JP2003270496A - Optical transmitting / receiving module, mounting method thereof, and optical transmitting / receiving device - Google Patents

Abstract

(57) [Problem] To achieve optical coupling between a light emitting element and a light receiving element and an optical fiber by only one adjustment (alignment) using one condensing lens, and it is easy to reduce the size. Provided are an optical transceiver module, a method for mounting the same, and an optical transceiver. SOLUTION: When transmitting and receiving light transmitted bidirectionally through an optical fiber 109, a first protrusion 101b and a second protrusion 101c are formed, respectively, protruding from a base along a light traveling path. 1 is a notch 104
a, the second protrusion has a first flat surface 102, and the first protrusion has a second flat surface 106 at the bottom of the notch.
A three-dimensional circuit board 101A having a first slope 104 on a side facing the second protrusion, a light emitting element 103 for transmission mounted on a first plane, and a light emitting element 103 mounted on a second plane. A light receiving element 107 for reception, an optical film member 105 mounted on the first slope, and a condenser lens 108 provided on a light traveling path between the optical fiber and the three-dimensional circuit board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transceiver module (optical subscriber line terminating device) which is connected to an optical fiber transmission line to transmit and receive an optical signal, a mounting method thereof, and an optical transceiver device.

[0002]

2. Description of the Related Art In an optical transmission system, when bidirectional transmission is performed using a single optical fiber, transmission light emitted from a light emitting element is coupled to the optical fiber and emitted from the optical fiber. It is necessary to couple the received light to the light receiving element, and various methods have been proposed for the coupling method.

FIG. 16 is a schematic configuration diagram of an optical transmission / reception module in a conventional optical signal transmission system disclosed in Japanese Patent Laid-Open No. 2000-180671. In the figure, on the optical axis of the tip surface of the ferrule 41 containing the optical fiber 42,
A prism type wavelength multiplexing / demultiplexing coupler 43 that allows light of the first wavelength λ1 to pass through in the optical axis direction and reflects light of the second wavelength λ2 in the direction perpendicular to the optical axis is fixed, and at the same time, in the optical axis direction. Further, the light emitting element 22 and the light receiving element 31 are respectively arranged in the direction perpendicular to the optical axis, and these are fixedly supported by the single case member 11, and the wavelength multiplexing / demultiplexing coupler 43, the light emitting element 22, and the light receiving element 31 are also provided. A single lens 13, 33 is arranged on each optical axis between and. The transmission light of wavelength λ1 from the light emitting element 22 passes through the wavelength multiplexing / demultiplexing coupler 43 as it is in the optical axis direction and is transmitted to the optical fiber 42. On the other hand, the received light of wavelength λ2 from the optical fiber 42 is reflected by the wavelength multiplexing / demultiplexing coupler 43 in the direction perpendicular to the optical axis, and the light receiving element 3
Received at 1.

[0004]

In the above-mentioned conventional optical transceiver module, the light emitting element 22 and the optical fiber 4 are used.
2 and the light receiving element 31
In order to optically couple the optical fiber 42 and the optical fiber 42 with high accuracy, 2
It is necessary to finely adjust the two lenses 13 and 33 and the ferrule 41, and in addition to the large number of adjustment points, the light emitting element 22
Since the light receiving element 31 and the light receiving element 31 are mounted in a cylindrical package and fixed by the case member 11, it is difficult to reduce the size of the module.

The present invention has been made in order to solve the above-mentioned problems of the conventional apparatus, and the optical coupling between the light emitting element and the light receiving element and the optical fiber is adjusted once by using one condenser lens ( It is an object of the present invention to provide an optical transmission / reception module that can be realized only by alignment) and can be easily miniaturized, a method for mounting the same, and an optical transmission / reception device.

[0006]

In order to achieve the above object, the invention according to claim 1 is characterized in that when transmitting and receiving light transmitted bidirectionally through an optical fiber at one end of the optical fiber, A first protrusion and a second protrusion protruding from the base are formed along the traveling path, the first protrusion has a notch that serves as a light traveling path, and the second protrusion is the first protrusion. And a first projection having a second flat surface on the bottom of the notch and a first sloped surface on the side facing the second projection, and the first flat surface. Of the light emitting element for transmission mounted on the top, the light receiving element for reception mounted on the second plane, the optical film member mounted on the first slope, the optical fiber and the three-dimensional circuit board. And a condensing lens provided in the light traveling path between them. With the above configuration,
The light emitting element, the light receiving element, and the optical film member can be miniaturized by integrating them on one three-dimensional circuit board, and the optical coupling between the light emitting element, the light receiving element and the optical fiber uses one condenser lens. It can be realized with only one adjustment (alignment).

According to a second aspect of the present invention, a half mirror is used as the optical film member, light emitted from the light emitting element passes through the half mirror at a constant rate, is condensed by a condenser lens and is incident on the optical fiber. The light emitted from the optical fiber is condensed by a condenser lens, reflected by a half mirror at a constant rate, and incident on a light receiving element. With such a configuration, it can be applied to a transceiver module for time-division communication with the same wavelength.

According to the third aspect of the invention, when the optical fibers bidirectionally transmit lights having different wavelengths, all the received light emitted from the optical fiber and condensed by the condenser lens is used as an optical film member. A wavelength filter is used which reflects the reflected light to enter the light receiving element, transmits all the transmitted light emitted from the light emitting element, collects the collected light with a condenser lens, and enters the optical fiber. With such a configuration, it is possible to reduce the loss of the light emitted from the light emitting element and the light incident to the light receiving element, and since the transmission wavelength and the reception wavelength are different, it is possible to apply to a transmitter / receiver module for wavelength multiplexing communication capable of transmitting and receiving at the same time.

According to a fourth aspect of the present invention, a frame-shaped protrusion that optically shields the periphery of the light receiving element from the other is provided, and the open end of the protrusion is covered with a wavelength filter that transmits only received light. . With this configuration, it is possible to block the leakage of the light emitted from the light emitting element into the light receiving element, and improve the optical crosstalk.

The invention according to claim 5 uses a light-receiving element having a high optical sensitivity only in the reception wavelength band. With this configuration, the light receiving sensitivity of the light receiving element with respect to the emitted light of the light emitting element can be suppressed, and the optical crosstalk can be improved.

According to a sixth aspect of the invention, there is provided an output monitor light receiving element mounted on the first back surface of the light emitting element for emitting the transmission light so as to be capable of receiving the rearward emitted light of the light emitting element. It is a thing. With this configuration, it is possible to further reduce the size of the optical transceiver module having the output monitor function.

In the invention according to claim 7, the three-dimensional circuit board is
The third protrusion is formed on the side farther from the optical fiber than the second protrusion, and the third protrusion is inclined by a predetermined angle with respect to the light emitting element with respect to the first plane. An output monitor light receiving element is provided which has an inclined surface and is mounted on the inclined surface so as to be able to receive the backward emission light of the light emitting element. With this configuration, it is possible to prevent the backward emission light of the light emitting element from being reflected by the end surface of the output monitoring light receiving element and returning to the light emitting element.

According to the invention of claim 8, the three-dimensional circuit board is
The third protrusion is provided on the back of the second protrusion,
Of the third projection is formed to be higher than the light traveling path by a predetermined dimension, and the third plane substantially parallel to the first plane and the central portion of the third projection on which the backward emission light of the light emitting element is irradiated. Has a notch, and has a third inclined surface that is inclined at an obtuse angle with respect to the first plane and has a reflective surface formed at the bottom of the notch,
The output monitor light-receiving element is mounted on the third plane so as to be able to receive the light emitted from the light-emitting element rearwardly reflected by the third inclined reflecting surface. With this configuration, the light emitting element, the light receiving element, and the output monitoring light receiving element are mounted in the same direction, so that the mounting can be simplified.

In the invention according to claim 9, the three-dimensional circuit board is
Formed on the side farther from the optical fiber than the second protrusion,
A fourth plane that is substantially parallel to the first plane and is formed lower than the first plane by a predetermined dimension, and a side farther from the optical fiber than the fourth plane, and faces the light emitting element. And a wall portion having a reflecting surface that is inclined at an acute angle with respect to the first plane, and the rear emission light of the light emitting element can be received on the fourth plane to receive the light reflected by the reflecting surface. A light receiving element for monitoring is mounted. With this configuration, the light emitting element, the light receiving element, and the output monitoring light receiving element have the same mounting direction, and the light receiving surfaces of the two light receiving elements have the same mounting direction. Therefore, the mounting is common and simplified. can do.

According to a tenth aspect of the present invention, the three-dimensional circuit board is formed on the side farther from the optical fiber than the light emitting element,
A light emitting element is provided with a wall portion having an opening that allows rear emission light to pass therethrough, and an output monitor light receiving element is mounted on the rear surface of the wall portion so as to be able to receive rear emission light that passes through the opening. With this configuration, the distance between the light emitting element and the light receiving element for output monitoring can be shortened, and the entire module can be downsized.

In the invention according to claim 11, when transmitting and receiving light transmitted bidirectionally in the optical fiber at one end of the optical fiber, the light is projected from the base along the traveling path of the transmitted and received light, A first protrusion is formed on the side closer to the fiber, and a second protrusion is formed on the side farther from the optical fiber, and the arm has an inverted "L" shape composed of a leg and an arm. A metal substrate having legs coupled to the rear end of the second protrusion toward the fiber side is provided, and the arm of the metal substrate has a predetermined distance between the first and second protrusions with respect to the light traveling path. Has a first plane formed to have a height higher than that of the first projection, the first protrusion has a notch serving as a light traveling path, and is substantially parallel to the first plane at the bottom of the notch, and , A second plane formed lower than the first plane, and a second plane on the side facing the second protrusion. The angled in an acute angle to the surface 1
A three-dimensional circuit board having a sloping surface, a light emitting element for transmission mounted on a light traveling path below the first plane, a light receiving element for reception mounted on a second plane, and a sloping surface. Mounted on the optical film member, a condenser lens provided in the light traveling path between the optical fiber and the three-dimensional circuit board, and mounted on the second protrusion to enable reception of backward emission light of the light emitting element. And a light receiving element for output monitoring mounted on. With such a configuration, it is possible to efficiently dissipate heat from the light emitting element and reduce electrical crosstalk between the wirings of the light emitting element and the light receiving element.

According to a twelfth aspect of the present invention, a condenser lens is fixed to the end face of the three-dimensional circuit board on the optical fiber side. With this structure, a support for the condenser lens is not required, and the structure can be simplified.

According to a thirteenth aspect of the present invention, among the light emitting element, the light receiving element, the optical film member and the output monitoring light receiving element, at least the light emitting element, the light receiving element and the optical film member are mounted on the three-dimensional circuit board with a package, A condenser lens is provided in the opening window on the optical fiber side of the package. With this configuration, the package to be sealed can also have the function of the fixture for the condenser lens.

According to a fourteenth aspect of the invention, in mounting the above-mentioned optical transceiver module, at least the light emitting element and the light receiving element among the light emitting element, the light receiving element and the output monitoring light receiving element are mounted on the three-dimensional circuit board. First step of electrical connection, second step of mounting optical film and condenser lens, light emitting element is made to emit light, and the position of the optical fiber is finely adjusted so as to maximize the coupling efficiency to the optical fiber. Then, the third step of fixing is performed in order.
By adopting the above method, the coupling of the light emitting element and the light receiving element to the optical fiber can be realized only by the optical adjustment between the lens and the optical fiber.

According to a fifteenth aspect of the present invention, there is provided an optical transmitter / receiver including one or a plurality of any one of the optical transmitter / receiver modules described above. With such a configuration, the optical transmitter / receiver can be downsized, and a multiport optical transmitter / receiver in which the optical transmitter / receiver module is integrated can be realized.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the preferred embodiments shown in the drawings. FIG. 1 is a side view of a first embodiment of an optical transmitter / receiver module according to the present invention, and FIG. 2 is a perspective view of a three-dimensional circuit board on which a semiconductor element for optical transmitter / receiver constituting this embodiment is mounted. FIG. 3 is a plan view in which a half mirror as an optical film member is mounted on this three-dimensional circuit board.

Here, the three-dimensional circuit board 101A is composed of a non-metal substrate such as a resin molded by a mold, and has a first protrusion 101b and a second protrusion 101b which partially protrude from a base 101a having a substantially flat bottom surface. Projections 101c are formed. Of these, a light emitting element (L for transmission) on the top surface of the second protrusion 101 c, that is, on the first plane 102.
D) 103 is mounted, and the first protrusion 101b formed on the light emitting side of the light emitting element 103 is inclined upward with an acute angle with respect to the optical axis of the light emitting element 103, and emits light. First slope 1 formed facing the element 103
04, and a half mirror (WDM) 105 as an optical film member is mounted on the first slope 104.

Further, the first sloped surface 104 is formed on the first
The protrusion 101b is notched at the center in the width direction, and is formed at the bottom of the notch 104a at a position lower than the first plane 102 and substantially parallel to the first plane 102. A second flat surface 106 (which makes an acute angle with the first inclined surface 104) is formed, and a light receiving element (PD) 107 for reception is mounted on the flat surface 106. Therefore, a part of the light emitted from the light emitting element 103 can pass through the half mirror 105 and travel therethrough, and the condenser lens 108 and the optical fiber 109 are arranged in that order in front of it.

The mounting procedure of the optical transceiver module configured as described above will be described below. Three-dimensional circuit board 1
The light emitting element 103 and the light receiving element 107 are aligned with 01 so that the transmitted and received light can be transmitted through the half mirror, reflected, and coupled to the optical fiber, and are respectively placed on the first plane 102 and the second plane 106. After mounting, make electrical connection to receive and supply power. Next, the half mirror 105 is mounted on the first slope 104, and further,
The condenser lens 108 is mounted on a holder (not shown) fixed to the three-dimensional circuit board 101. Finally optical fiber 1
09 is mounted on a holder (not shown) capable of fine adjustment, so that the light emitting element 103 and the light receiving element 107 are optically coupled.

This optical coupling will be described in detail. First, the light emitting element 103 is caused to emit light, and the optical fiber 10
The emitted light from the optical fiber 10 is monitored and the position of the optical fiber with respect to the three-dimensional circuit board 101 is finely adjusted while the optical fiber 10
Fix at the point where the output of 9 becomes the largest. here,
Since the light emitting element and the light receiving element are mounted so as to pass through the positions where the optical axes of the light emitting element 103 and the light receiving element 107 intersect and are symmetrical with respect to the plane of the half mirror, the optical coupling between the light receiving element 107 and the optical fiber 109 is performed. The physical combination can be realized at the same time.
The mounting method described above can be similarly applied to other embodiments described below.

Next, the operation of this optical transceiver module will be described. First, the light emitted from the light emitting element 103 is transmitted through the half mirror 105 at a certain ratio, and the remaining light is reflected upward in the drawing. The light transmitted through the half mirror 105 is condensed by the condenser lens 108, and the optical fiber 1
09 and transmitted. On the other hand, the received light transmitted through the transmission path is condensed by the condenser lens 108, reflected by the half mirror 105 at a predetermined ratio, and received by the light receiving element 107.
And the rest of the light is transmitted. Note that transmission and reception are temporally divided and alternately performed.

As described above, the first flat surface 102 is formed on the top of one of the two protrusions, and the first inclined surface 104 is formed inside the other protrusion arranged in parallel with the protrusion. A central portion in the width direction of the projection on which the first slope 104 is formed is notched, and the bottom surface of the notch is the second plane 1 which is substantially parallel to the first plane 102.
The three-dimensional circuit board 101 which has become 06, the light emitting element 103,
By positioning and mounting the light receiving element 107 and the half mirror 105 with a predetermined accuracy, the optical transceiver module can be integrated and downsized, and the optical fiber 1
09, the light-receiving element 107, the condenser lens 108, and the optical fiber 109 can be coupled at the same time by adjusting the optical axes of the light-emitting element 103, the condenser lens 108, and the optical fiber 109 only once. It is simplified.

FIG. 4 is a side view showing the configuration of the second embodiment of the optical transceiver module according to the present invention, which is the same as the first embodiment described with reference to FIGS. 1 to 3 in the figure. The same elements are denoted by the same reference numerals and the description thereof will be omitted. In the second embodiment, instead of the half mirror 105 constituting the first embodiment, a first optical film member is used.
The configuration is the same as that of the first embodiment except that the wavelength filter 110 is mounted. The second embodiment is applied to a system in which the transmission wavelength of light emitted from the light emitting element 103 and the reception wavelength received by the light receiving element 107 are different, and the wavelength filter 110 transmits all transmission wavelengths. , Has the property of totally reflecting the reception wavelength.

Next, the operation of the second embodiment shown in FIG. 4 will be described. First, the light emitted from the light emitting element 103 is completely transmitted through the wavelength filter 110. The transmitted light is condensed by the condenser lens 108, is coupled to the optical fiber 109, and is transmitted. On the other hand, the received light transmitted through the transmission path is condensed by the condenser lens 108, is totally reflected by the wavelength filter 110, and is incident on the light receiving element 107. As described above, by using the wavelength filter and making the transmission wavelength and the reception wavelength different from each other, it is possible to reduce the loss of the emitted light of the light emitting element 103 and the incident light of the light receiving element 107. It can be applied to a transmitting / receiving module for multiplex communication.

FIG. 5 is a side view showing the structure of the third embodiment of the optical transmitter / receiver module according to the present invention by partially using a cross section, and in the drawing, the second embodiment described with reference to FIG. The same elements as those in the embodiment are denoted by the same reference numerals and the description thereof will be omitted. In the second embodiment, the light receiving element 107
The second plane 106 of the three-dimensional circuit board 101B on which the
A frame-shaped protrusion 111 that optically shields the periphery of the light-receiving element 107 from the other is provided on the upper portion, and the open end of this protrusion 111 is substantially parallel to the light-receiving surface of the light-receiving element and covers the open end. The configuration is different from that of FIG. 4 in that the second wavelength filter 112 is mounted, and the other configurations are the same as those of FIG. The second wavelength filter 112 has a characteristic of totally reflecting the transmission light of the wavelength emitted from the light emitting element 103 and totally transmitting the reception light of the wavelength received from the optical fiber 109, which is not shown in FIG. .

The third embodiment performs almost the same transmission / reception operation as the second embodiment, but the newly provided second wavelength filter 112 reflects the stray light from the light emitting element 103. This prevents the stray light from accidentally entering the light receiving element 107, and only the received light enters the light receiving element 107. As described above, the frame-shaped projection 111 that optically shields the periphery of the light receiving element 107 from the other is provided, and the light incident surface of the projection 111 is covered with the second wavelength filter 112, thereby reducing optical crosstalk. can do.

FIG. 6 is a side view showing the configuration of the fourth embodiment of the optical transceiver module according to the present invention, which is the same as the first embodiment described with reference to FIGS. 1 to 3 in the figure. The same elements are denoted by the same reference numerals and the description thereof will be omitted. The three-dimensional circuit board 101C according to the fourth embodiment outputs on the first plane 102 on which the light emitting element 103 is mounted, to the side opposite to the direction in which the light emitting element 103 emits the transmitted light, that is, to the rear side. The configuration is different from that of the first embodiment in that the monitor light-receiving element 113 is mounted, and the other configurations are the same as those of the first embodiment. In this case, the output monitoring light receiving element 113 utilizes that the light emitting element 103 emits light not only in the outgoing direction of the transmitted light but also in the rear direction.
The output monitor light receiving element here is capable of receiving light from the side surface, and the output monitor light receiving element 113 receives light emitted from the rear side.

With respect to the operation of the fourth embodiment shown in FIG. 6, the part of the configuration different from that of the first embodiment will be described. The light emitting element 103 also emits light to the rear with respect to the outgoing direction of the transmitted light, but the output current of the output monitor light receiving element 113 that has received the backward emitted light is monitored in advance so that this output current becomes constant. By controlling the bias current of the light emitting element 103, the output light level can be controlled to be constant. As described above, the three-dimensional circuit board 1
The light emitting element 103 for transmission and the light receiving element 10 on 01C.
By mounting the light receiving element 113 for the output monitor in addition to 7, and the half mirror 105 or the first wavelength filter 110, the optical transceiver module can be further integrated and the mounting can be simplified.

FIG. 7 is a side view showing the configuration of the fifth embodiment of the optical transceiver module according to the present invention. In the figure, the same elements as those of the fourth embodiment described with reference to FIG. 6 are shown. Are assigned the same reference numerals and explanations thereof are omitted. The three-dimensional circuit board 101D according to the fifth embodiment includes the light emitting element 10
A third protrusion 101d having a second inclined surface 114 facing the light emitting element 103 and inclined upward by a predetermined angle in the opposite direction to the direction in which 3 transmits the transmitted light is also provided. The light receiving element 113 for output monitoring on the slope 114 of the
Is implemented. As a result, the light receiving surface of the output monitoring light receiving element 113 is inclined with respect to the backward emission light of the light emitting element 103, which is different from the fourth embodiment. The light receiving element 1 for output monitoring
Reference numeral 13 is a standard one having a light receiving surface on its surface.

The fifth embodiment shown in FIG. 7 operates in the same manner as the fourth embodiment shown in FIG. 6, except that a light emitting element is provided with respect to the light receiving surface of the light receiving element 113 for output monitoring. 10
Since the rearward outgoing light of No. 3 obliquely enters, it is possible to prevent the reflected light from the light receiving surface of the output monitoring light receiving element 113 from entering the light emitting element 103. As described above, the second slope 11 located behind the surface on which the light emitting element is mounted
By mounting the output monitor light-receiving element 113 in FIG. 4, a standard light-receiving element capable of surface incidence can be used, and the influence of reflected light on the light-receiving surface of the output monitor light-receiving element on the light-emitting element 103. Can be reduced.

FIG. 8 is a side view showing the configuration of the sixth embodiment of the optical transceiver module according to the present invention, and FIG. 9 is a perspective view of this embodiment. In each figure, the same elements as those of the fourth embodiment shown in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. In the three-dimensional circuit board 101E that constitutes this embodiment, a protrusion 101e whose top is higher than that of the first flat surface 102 is formed at the rear portion of the light emitting element 103 with respect to the optical signal emission direction. 101e
A third plane 11 parallel to the first plane 102 at the top of the
5 is formed, and the widthwise intermediate portion of the protruding portion 101e is cut out so as to face the light emitting element 103 on the bottom surface thereof and tilt upward by a predetermined angle (obtuse angle with respect to the first plane 102). A third slope 116 having an angle is formed. A reflective surface is formed on the third slope 116, and the output monitor light-receiving element 11 is formed on the third plane 115.
3 is different from the configuration shown in FIG. Therefore, the backward emission light of the light emitting element 103 is reflected by the reflection surface formed on the third inclined surface 116, and the reflected light enters from the back surface of the output monitoring light receiving element 113.

With this configuration, the backward emission light of the light emitting element 103 is reflected by the reflecting surface of the third inclined surface 116 and is incident on the output monitoring light receiving element 113. Therefore, as the output monitoring light receiving element 113, Since a standard light receiving element capable of entering light from both the front surface and the back surface can be used, and the mounting direction of the output monitoring light receiving element 113 is the same as the light receiving element 107, the mounting process can be simplified. You can

FIG. 10 is a side view showing the configuration of the seventh embodiment of the optical transceiver module according to the present invention.
The same elements as those in the fourth embodiment shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. In the three-dimensional circuit board 101F that constitutes this embodiment, the rear portion of the light emitting element 103 with respect to the optical signal emission direction is recessed to form a fourth flat surface 117 that is substantially parallel to the first flat surface 102 at the bottom thereof. Further, the wall portion 118 is extended to the upper side of the drawing behind the recess, and the upper wall surface 119 facing the light emitting element 103 is inclined obliquely downward to form a reflection surface on the wall surface 119. . Then, the output monitor light receiving element 113 is mounted on the fourth plane 117, and the light emitting element 10
The inclination angle of the wall surface 119 is determined so that the backward emitted light of No. 3 is reflected by the wall surface 119 and travels toward the output monitor light receiving element 113.

With this structure, the rear emission light of the light emitting element 103 is reflected by the reflection film of the wall surface 119 and is received by the output monitoring light receiving element 113.
As a result, a standard light receiving element that allows light to enter from the surface can be used as the output monitoring light receiving element 113, and the mounting direction of the output monitoring light receiving element 113 is the same direction as the light emitting elements 103 and 107. Therefore, the mounting process can be simplified.

FIG. 11 is a side view showing the configuration of the eighth embodiment of the optical transceiver module according to the present invention.
The same elements as those in the fourth embodiment shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. The three-dimensional circuit board 101G that constitutes this embodiment is provided with a wall portion 118 projecting upward in the drawing at a rear portion of the light emitting element 103 with respect to the optical signal emitting direction and at a portion facing the light emitting element 103. An opening 120 is provided. The output monitor light receiving element 113 is mounted on the side opposite to the side facing the light emitting element 103, that is, on the outside of the opening 120 with its light receiving surface aligned.

With this structure, the rear emission light of the light emitting element 103 reaches the light receiving surface of the output monitoring light receiving element 113 through the opening 120, and the output monitoring light receiving element 113 receives the rear emission light. That means
As a result, the mounting space for the output monitor light-receiving element 113 can be reduced, so that the module can be downsized.

FIG. 12 is a side view showing the configuration of the ninth embodiment of the optical transceiver module according to the present invention.
The same elements as those of the fifth embodiment shown in FIG. 7 are designated by the same reference numerals, and the description thereof will be omitted. The three-dimensional circuit board 101H that constitutes this embodiment is configured by removing the protrusions on which the light emitting elements 103 are mounted in the three-dimensional circuit board 101 shown in FIG. 7, and instead using the leg portions 121a and the arm portions 121b. Attaching an inverted "L" -shaped metal substrate 121, and connecting its legs 121a to the rear end of the three-dimensional circuit board body,
The arm portion 121b is fixed toward the front. 7 is different from FIG. 7 in that the heat sink 122 is mounted on the bottom surface of the tip of the arm 121b of the metal substrate 121, and the light emitting element 103 is mounted on the lower surface of the heat sink 122. The light emitting element 103 is mounted at the same position as in FIG.

The transmission and reception of the optical signal and the reception of the backward outgoing light in the ninth embodiment configured as described above are the same as those in the fifth embodiment shown in FIG. The ninth embodiment is a metal substrate 121.
In addition, since the light emitting element 103 is mounted via the heat sink 122, the heat radiation efficiency of the light emitting element 103 can be improved, and thus the reliability of operation can be improved, and the mounting substrate for the light emitting element and the light receiving element are separately provided. By doing so, electrical crosstalk between the wirings of the light emitting element and the light receiving element can be reduced.

Incidentally, the mounting procedure of this embodiment will be described below. First, the three-dimensional circuit board 1
Reference numeral 01 denotes a light receiving element 107 and an output monitoring light receiving element 113.
Position and mount, then make electrical connection. Next, the first wavelength filter 110 is mounted flat on the first slope 104. On the other hand, the light emitting element 103 is positioned and mounted on the heat sink 122 mounted on the metal substrate 121, and is electrically connected so that power can be supplied. After that, the three-dimensional circuit board body and the metal substrate 121 are integrally coupled. The method of fixing the condenser lens 108 and the optical fiber 109 is the same as that of the first embodiment.

Although the ninth embodiment shown in FIG. 12 is a modification of the fifth embodiment shown in FIG. 7, the fourth, sixth to eighth embodiments described above are not applicable. By deforming and mounting the light emitting element 103 on the metal substrate 121 via the heat sink 122, the heat dissipation efficiency of the light emitting element 103 is enhanced as in the case described above, and thus the reliability of operation is improved. It is also possible to obtain the effect of reducing the electrical crosstalk between the wirings of the light emitting element and the light receiving element by separating the mounting substrate of the light emitting element and the light receiving element.

FIG. 13 is a side view showing the configuration of the tenth embodiment of the optical transceiver module according to the present invention. In the figure, the same elements as those of the fifth embodiment shown in FIG. 7 are the same. And the description thereof will be omitted. In the three-dimensional circuit board 101I that constitutes this embodiment, the front end surface 123 of the light emitting element 103 on the outgoing light side is substantially perpendicular to the bottom surface, and is also perpendicular to the optical axis of the outgoing light. Further, the projected portion 101b on the outgoing light side is notched in the central portion in the width direction with the optical axis being divided. Then, in the central portion of the notch of the front end surface 123, a recess is formed to fit the surface shape of the condenser lens 108, and the condenser lens 108 is fixed to the recess with an adhesive. In this way, the condenser lens 10 is provided on the tip surface 123 of the light emitting element 103 on the outgoing light side.
By fixing 8 to each other, it is not necessary to separately provide a holder for the condenser lens 108, so that the structure can be simplified.

The tenth embodiment shown in FIG. 13 is a modification of the fifth embodiment shown in FIG. By appropriately selecting the focal length of the optical lens 108, the same effect as in the above case can be obtained if the optical lens 108 is fixed to the tip surface of the three-dimensional circuit board according to another embodiment. In addition, in the tenth embodiment shown in FIG. 13, the condenser lens 108 is fixed to the front end surface of the three-dimensional circuit board 101 using an adhesive, but the condenser lens 108 is fixed to the recess by another method. May be.

FIG. 14 is a side view showing the structure of an eleventh embodiment of an optical transceiver module according to the present invention with a part thereof broken away. This is an integrated assembly of the condenser lenses 108 shown separately in the first to ninth embodiments. Here, the three-dimensional circuit board 1 shown in FIG.
01 is housed and stored in a package 124 having input / output pins, and this package 124 is also used to improve moisture resistance.
The light-tight sealing is performed by using the condenser lens 10 in the opening window of the package 124 located in the emission direction of the light emitting element 103.
Install 8. However, the position of the condenser lens 108 is the first
It is necessary to predetermine the height of the package so as to be the same as that in the above embodiment. In this way, by installing the condenser lens in the opening window located in the emitting direction of the light emitting element of the package storing the three-dimensional circuit board, the package for hermetic sealing also functions as a holder for the condenser lens. Therefore, the configuration can be simplified.
It should be noted that the three-dimensional circuit board according to another embodiment can be housed in the package 124, and the same effect as the above case can be obtained.

FIG. 15 is a perspective view showing the configuration of an embodiment of an optical transmitter / receiver according to the present invention. Although this embodiment can use any of the optical transceiver modules of the first to eleventh embodiments, in particular, the optical transceiver module 125 according to the eleventh embodiment shown in FIG. 14 is used. The case is shown. Here, one or more optical transmitting / receiving modules 125 are mounted on the main resin substrate 126 of the optical transmitting device, and are housed in the optical transmitting / receiving device housing 127. An optical fiber connector plug 128 having a function of an optical input / output port is attached to the front panel of the housing 127.

As described above, by accommodating the optical transmitter / receiver module having the three-dimensional circuit board in the optical transmitter / receiver housing, the optical transmitter / receiver can be miniaturized. A transceiver device can be realized.

[0051]

As described above, according to the present invention,
At least one of a light emitting element, a light receiving element, an optical film member, a light receiving element for output monitoring, and a condenser lens on the three-dimensional circuit board,
Since the light emitting element, the light receiving element and the optical film member are integrally housed, the optical coupling between the light emitting element, the light receiving element and the optical fiber can be realized by only one adjustment using one condenser lens. The effect of facilitating miniaturization is obtained.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of an optical transceiver module according to the present invention.

FIG. 2 is a perspective view of a three-dimensional circuit board on which a semiconductor element for optical transmission / reception, which constitutes the first embodiment shown in FIG. 1, is mounted.

FIG. 3 is a plan view in which a half mirror as an optical film member is mounted on the three-dimensional circuit board of the first embodiment shown in FIG.

FIG. 4 is a side view showing the configuration of the second embodiment of the optical transceiver module according to the present invention.

FIG. 5 is a side view showing a configuration of a third embodiment of the optical transceiver module according to the present invention partially with a cross section.

FIG. 6 is a side view showing a configuration of a fourth embodiment of an optical transceiver module according to the present invention.

FIG. 7 is a side view showing the configuration of the fifth embodiment of the optical transceiver module according to the present invention.

FIG. 8 is a side view showing the configuration of the sixth embodiment of the optical transceiver module according to the present invention.

9 is a perspective view of the sixth embodiment shown in FIG.

FIG. 10 is a side view showing the configuration of the seventh embodiment of the optical transceiver module according to the present invention.

FIG. 11 is a side view showing the configuration of the eighth embodiment of the optical transceiver module according to the present invention.

FIG. 12 is a side view showing the configuration of the ninth embodiment of the optical transceiver module according to the present invention.

FIG. 13 is a side view showing the configuration of the tenth embodiment of the optical transceiver module according to the present invention.

FIG. 14 is a side view showing the configuration of an eleventh embodiment of an optical transceiver module according to the present invention with a part thereof cut away.

FIG. 15 is a perspective view showing a configuration of an embodiment of an optical transceiver according to the present invention.

FIG. 16 is a schematic configuration diagram of an optical transceiver module in a conventional optical signal transmission system.

[Explanation of symbols]

101A-101I Three-dimensional circuit board 102 First plane 103 Light emitting element for transmission 104 First slope 105 Half mirror (optical film member) 106 Second plane 107 light receiving element 108 Condensing lens 109 optical fiber 110 First wavelength filter 111 protrusion 112 Second wavelength filter 113 Light receiving element for output monitor 114 Second slope 115 Third plane 116 Third slope 117 Fourth plane 118 wall 119 wall surface 120 openings 121 Metal substrate 122 heat sink 123 Front end surface of three-dimensional circuit board 124 Hermetically sealed package 125 Optical transceiver module 126 Main resin substrate 127 Optical transmitter / receiver housing lug 128 optical fiber connector

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI Theme Coat (reference) H04B 10/13 10/135 10/14 (72) Inventor Nitoro Togo Tsunashima Tohoku, Kohoku Ward, Yokohama City, Kanagawa Prefecture 3-3-1 Matsushita Communication Industrial Co., Ltd. (72) Inventor Hiroaki Asano 4-3-1, Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd. F-term (reference) 2H037 BA03 BA12 CA10 CA37 DA02 DA06 DA18 5F073 AB27 AB28 AB29 BA02 EA26 EA27 FA02 FA11 FA23 5F088 AA01 BA15 BA16 BA18 BB01 EA09 EA11 JA03 JA12 JA13 JA14 5F089 AA01 AC01 AC10 CA15 CA20 5K102 AA15 AA31 AL12 MA01 MA02 MC01 RB02

Claims (15)

[Claims] 1. Light transmitted bidirectionally through an optical fiber,
In an optical transceiver module that transmits and receives at one end of the optical fiber, each protrudes from a base along a traveling path of light to be transmitted and received, and a first protrusion is provided on a side closer to the optical fiber, and a first protrusion is provided on a side far from the optical fiber. A second protrusion is formed, the first protrusion has a notch serving as a light traveling path, and the second protrusion is formed lower than the light traveling path by a predetermined dimension. A second flat surface having a first flat surface, the first protruding portion being substantially parallel to the first flat surface at the bottom of the notch, and being lower than the first flat surface.
And a three-dimensional circuit board having a first inclined surface having an acute angle with the second plane on the side facing the second protrusion, and a three-dimensional circuit board mounted on the first plane for transmission. A light emitting element, a receiving light receiving element mounted on the second plane, an optical film member mounted on the first slope, and a light beam between the optical fiber and the three-dimensional circuit board. An optical transceiver module, comprising: a condenser lens provided on a traveling path. 2. The optical film member is composed of a half mirror, and light emitted from the light emitting element passes through the half mirror at a constant rate, is condensed by the condenser lens, and enters the optical fiber. The light transmitting / receiving module according to claim 1, wherein the light emitted from the optical fiber is condensed by the condenser lens, reflected by the half mirror at a constant rate, and incident on the light receiving element. 3. When the optical fiber bidirectionally transmits lights having different wavelengths, the optical film member totally reflects the received light emitted from the optical fiber and condensed by the condenser lens. 2. A wavelength filter that causes the transmission light emitted from the light emitting element to be incident on the light receiving element and totally transmitted, is condensed by the condenser lens, and is incident on the optical fiber. Optical transceiver module. 4. A frame-shaped protrusion that optically shields the periphery of the light receiving element from the other is provided, and the open end of the protrusion is covered with a wavelength filter that transmits only received light. 3. The optical transceiver module according to item 3. 5. The light receiving element has a light receiving sensitivity having wavelength dependency, has a high light receiving sensitivity for the received light, and has a lower light receiving sensitivity for other wavelengths, and at least a transmitting light. The optical transceiver module according to claim 3, which has a remarkably low light receiving sensitivity with respect to the wavelength of light. 6. A light-receiving element for output monitoring, which is mounted so as to be able to receive rear-emitted light of the light-emitting element, on the first plane behind the light-emitting element that emits transmitted light. The optical transceiver module according to any one of claims 1 to 5, which is characterized in that. 7. The three-dimensional circuit board includes a third protrusion portion formed on a side farther from the optical fiber than the second protrusion portion, the third protrusion portion facing the light emitting element. And an output monitor light receiving element mounted on the slope so as to be able to receive the backward emission light of the light emitting element. The optical transceiver module according to any one of claims 1 to 5. 8. The three-dimensional circuit board includes a third protrusion formed on a side farther from the optical fiber than the second protrusion, and the third protrusion is more than a light traveling path. A third plane, which is formed to be high by a predetermined dimension and is substantially parallel to the first plane, and a central portion of the third protrusion, which is irradiated with the backward emission light of the light emitting element, are notched, and the notch is formed. Has a third slope inclined at an obtuse angle with respect to the first plane and having a reflection surface formed on the bottom thereof, and the rear emission light of the light emitting element is on the third plane. 6. A light receiving element for output monitoring, which is mounted so as to be able to receive the light reflected by the third reflecting surface of the inclined surface.
The optical transceiver module according to any one of 1. 9. The three-dimensional circuit board is formed on a side farther from the optical fiber than the second protrusion is, and
And a fourth plane that is substantially parallel to the first plane and is formed lower than the first plane by a predetermined dimension, and is formed on a side farther from the optical fiber than the fourth plane, And a wall portion having a reflecting surface facing the first plane and inclined at an acute angle with respect to the first plane, and on the fourth plane,
The light transmitting / receiving module according to claim 1, wherein an output monitor light receiving element is mounted so as to be able to receive the light emitted from the light emitting element from the rear surface and reflected by the reflecting surface. . 10. The three-dimensional circuit board includes a wall portion that is formed on a side farther from the optical fiber than the light emitting element, and has an opening that allows rearward emission light of the light emitting element to pass therethrough,
The light transmitting / receiving module according to claim 1, wherein a light receiving element for output monitoring is mounted on the rear surface of the wall portion so as to be able to receive the rearward emission light passing through the opening. 11. In an optical transceiver module for transmitting and receiving light transmitted bidirectionally through an optical fiber at one end of the optical fiber, the optical transmitting and receiving module projects from the base along a traveling path of the light to be transmitted and received to the optical fiber. A first protrusion is formed on the near side, and a second protrusion is formed on the side far from the optical fiber, and
An inverted “L” -shaped body composed of a leg portion and an arm portion is formed, and a metal substrate to which the leg portion is coupled is attached to the rear end portion of the second protrusion with the arm portion facing the optical fiber side. However, the arm portion of the metal substrate has a first flat surface formed between the first and second protrusions by a predetermined dimension higher than a light traveling path, and the first protrusion is a light source. A second plane that has a notch that serves as a traveling path of the second plane, that is substantially parallel to the first plane at the bottom of the notch, and that is formed lower than the first plane; And a three-dimensional circuit board having a first inclined surface having an acute angle with respect to the second plane on the side facing the second protrusion, and mounted on the light traveling path under the first plane. A light emitting element for transmission, a light receiving element for reception mounted on the second plane, and an optical film member mounted on the inclined surface. A condenser lens provided in a light advancing path between the optical fiber and the three-dimensional circuit board; and a second projection, which is mounted so as to be able to receive rear emission light of the light emitting element. An optical transmitter-receiver module comprising a light-receiving element for output monitoring. 12. The optical transceiver module according to claim 1, wherein the condenser lens is fixed to an end face of the three-dimensional circuit board on the optical fiber side. 13. Among the light emitting device, the light receiving device, the optical film member, and the light receiving device for output monitoring, at least the three-dimensional circuit board on which the light emitting device, the light receiving device, and the optical film member are mounted is covered with a package, The optical transceiver module according to claim 1, wherein the condenser lens is provided in an opening window on the optical fiber side. 14. The method for mounting an optical transceiver module according to claim 1, wherein at least the light emitting element and the light receiving element among the light emitting element, the light receiving element, and the output monitoring light receiving element are provided on the three-dimensional circuit board. A first step of mounting and electrical connection; a second step of mounting the optical film and the condenser lens; causing the light emitting element to emit light so that the coupling efficiency with the optical fiber is maximized. And a third step of finely adjusting and fixing the position of the optical fiber, the steps being performed in order. 15. The method according to any one of claims 1 to 13.
An optical transmitter / receiver device comprising one or a plurality of the optical transmitter / receiver modules described in 1.