JPH02143207A - Optoelectronic device with optical coupler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optoelectronic device that performs optical coupling, and in particular to an optoelectronic device to which a plug holding an optical component serving as an optical transmission medium such as an optical fiber or a lens is connected. The present invention relates to an optoelectronic device with an optical coupler that includes a sleeve.

[Prior Art] A semiconductor laser device 1, a light emitting diode device, and a photodiode device are used as a light source and a light receiver for optical fiber communication. To connect optoelectronic devices such as the semiconductor laser device 5, light emitting diode device, and photodiode device to the optical fiber (optical fiber cable),
Generally, an optical coupler such as a receptacle and an optical connector (optical connector plug) that are paired with each other is used. For example, the optical connector plug (hereinafter simply referred to as plug) is described throughout the JIS standard JIS-C5970.
j to. ) A receptacle (optical coupler) is known that achieves optical coupling with an optical element by inserting an optical fiber, and the shaft diameter of the plug that holds the optical fiber is, for example, 2.
The length is 499 mm, and the tolerance is ±0.0005 mm. Further, the inner diameter of the sleeve (circular tube) of the receptacle into which the plug is inserted is 2.5 mm in diameter, and the tolerance thereof is 0 to +0.003 mm. This results in
The plug is held with little movement relative to the sleeve.

[Problems to be Solved by the Invention] As described above, in the conventional optical coupler structure, the fit between the plug and the sleeve is appropriately selected to prevent the plug from moving relative to the sleeve. However, the fit between the plug, or shaft, and the sleeve, or hole, is such that the maximum dimension of the shaft is smaller than the minimum dimension of the hole, so-called a loose fit, but when the inner diameter of the sleeve is the largest and the outer diameter of the plug is the smallest In this case, a gap of 4 μm occurs. As described above, a gap may occur between the sleeve and the plug depending on the combination of the sleeve and the plug. If a gap occurs, the plug can move in a direction perpendicular to the optical axis. Therefore, in the case of an optical coupling system that requires high-precision (3) positioning of several μm or less, such as optical coupling between a laser diode and an optical connector with a built-in single-mode fiber, each time the plug is turned, due to the existence of the gap, The inventor has revealed that the optical coupling state changes, the optical coupling efficiency fluctuates, and the optical output (fiber optical output) taken out by the optical connector fluctuates.

An object of the present invention is to provide an optoelectronic device with optical coupling, which eliminates the gap at the fitting part between the optical collector plug and the inner diameter of the sleeve of the receptacle, and which can always obtain a stable optical coupling system when attaching and detaching the optical connector plug. The purpose is to capture and provide equipment.

The above and other objects and novel features of the present invention include:
It will become clear from the description of this specification and the accompanying drawings.

[i! T! Means to solve the problem]

A brief summary of typical inventions disclosed in this application is as follows.

That is, in the optoelectronic device with optical coupling of the present invention,
The receptacle has a receptacle to which the optical connector is attached, and the receptacle is provided with a tubular sleeve into which the plug of the optical connector is inserted.This sleeve is made of an elastic metal, and its inner end is The plug gradually becomes thinner so that the inner diameter of the tip portion is smaller than the outer diameter of the plug. Further, the inner end of this sleeve is provided with four slints at 90-degree intervals along the axial direction from its tip. The narrow inner end of the sleeve constitutes a locking portion, and the plug inserted into the sleeve is elastically tightened and fixed.

[Effect]

According to the means described in E, in the optoelectronic device with optical coupling of the present invention, in the receptacle and the optical connector as the optical coupling body, the inner end portion of the sleeve of the receptacle is narrowly sandwiched and has a plurality of slits. When the plug of the optical connector is inserted into this sleeve, the locking part elastically tightens the plug and fixes the plug without any gaps. can do. Therefore, in the optoelectronic device with optical coupling of the present invention, after the optical coupling between the plug that guides the optical fiber and the optical element attached to the receptacle side is established, the optical connector is loosened or tightened to remove the plug. Even if this is done, the plug will not move in the direction perpendicular to the optical axis because there is no gap between the fixed part of the sleeve and the plug, and the optical coupling state between the optical element and the optical fiber of the plug will always remain in the initial setting. can be maintained and high-precision optical coupling can be guaranteed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an optoelectronic device with a receptacle and an optical connector plug according to an embodiment of the present invention, FIG. 2 is a sectional view showing an optoelectronic device with a receptacle equipped with an optical connector plug, and FIG. Similarly, FIG. 4 is a sectional view showing the sleeve of the receptor, and a left side view.

Before explaining the features of the present invention, the main parts of the optoelectronic device with an optical coupler to which the present invention is applied will be explained.

As shown in FIG. 1, the receptacle-equipped optoelectronic device 1 includes an optoelectronic device 2 and a receptacle 3 to which an optical connector (not shown) is attached. The optoelectronic device 2 is attached to a cylindrical body 5 welded to the bottom of the receptacle main body 4 of the receptacle 3.
The parts are fixed by welding. This photoelectronic bag 〃2 has a structure in which leads 7 serving as external terminals are protruded from the bottom of the package 6, and an optical element is provided inside the package 6. Light is exchanged with the outside through a transparent window with plates and lenses fitted airtight. The optical element includes a laser diode, a light emitting diode, or a light receiving element as a light emitting element. In this embodiment, it is assumed that the package 6 contains a laser diode element.

The receptacle 3 consists of a receptacle main body 4, a receptacle housing 8 screwed onto the receptacle main body 4, and a cylindrical sleeve 9 fixed to the +tilδ receptacle housing. The receptacle main body 4 has a cylindrical structure with a bottom, a disk portion at the bottom serves as a stop portion 1O, and a male thread 12 is provided on the outer peripheral surface of the cylindrical portion 11. Also,
The center portion of the stop portion 10 of the receptacle body 4 corresponds to the extension line of the optical axis of the photoelectronic bag; η2. A light transmission hole I3 for transmitting and receiving light is provided in the center of the stop portion 10.

The receptor housing 8 is provided with a female thread 14 on the inner peripheral surface of its inner end, and is adapted to be screwed into the auxiliary thread 12. Further, a fixing portion 15 consisting of a protrusion having a predetermined height is provided on the inner circumferential surface of the central portion of the receptor housing 8 along the inner circumferential surface.

This fixing portion I5 presses a collar 16 provided on the outer periphery of the sleeve 9 against the cylindrical portion 11 of the receptacle body 4 when tightening the receptacle housing 8 to the receptacle body 4. Further, on the outer peripheral surface of the outer end of the receptor housing 8, a male screw 17 is provided for screwing an optical connector (not shown).

The sleeve 9 is made of a cylindrical body as shown in FIGS. 3 and 4, and the collar 16 is provided on the outer periphery closer to the inner end as described above. Also, this R1.
The cylindrical portion on the inner end side of the receptacle body 4
The outer end of the cylindrical portion 11 is inserted into the inner periphery of the fixed portion 15 of the receptor housing 8 .

This sleeve 9, as shown in FIG.
When the inner end portion is inserted into the cylindrical portion 11 of the receptacle main body 4 and the receptacle housing 8 is screwed into the receptacle main body 4, the collar 16 is connected to the end surface of the cylindrical portion 11 and the fixing portion 15 as described above. It is fixed by being held between them.

On the other hand, as shown in FIG. 2, a plug (optical connector plug) 20 is inserted into the fixed sleeve 9, and is fixed by screwing an optical connector (not shown) into the receptacle housing 8. The plug 20 is a shaft body having a structure in which an optical fiber 21 is inserted and held along its center.

By the way, this is one of the features of the present invention, and even if there are variations in the inner diameter dimension of the sleeve 9 and the outer dimension of the plug 20, the sleeve 9 will always keep the plug 20 aligned with the optical axis 18.
The structure is such that the plug 20 can be fixed so that it does not move in the direction perpendicular to the direction. That is, the sleeve 9
As shown in the figure and FIG.
6 is provided. The inner end side of this collar 16, that is, the left end side as shown in FIG.
A slot 22 is provided along the axial direction from the tip. As shown in FIG. 4, the slits 22 are provided in a cross shape, in other words, at intervals of 90 degrees. The portion divided by these slits 22 constitutes a locking portion 23. Further, the outer end side of the flange 16 of this sleeve 9, that is, the right end side in FIG. 3, has a constant inner diameter and outer diameter. This inner diameter is larger than the outer diameter d of the plug 20, as shown in FIG. On the contrary,
The inner diameter D2 of the tip portion of the locking portion 23 is the same as that of the plug 2.
It is the same as or smaller than the outer diameter d of 0.

Therefore, when the plug 20 is inserted into the sleeve 9 fixed to the receptacle main body 4 and the receptacle housing 8 as shown in FIG. It is retained without being retained. That is, if the outer diameter of the plug 20 and the inner diameter of the locking portion 23 of the sleeve 9 are the same, the gap will be zero at the fitting portion between the two. In addition, the locking portion 2 of the plug 20 and the sleeve 9
In the fitting of machining dimension 3, the inner diameter D of the locking part 23
If Z is the maximum and the outer diameter d of the plug 20 is the minimum and the dimensions of both are the same, then in other combinations of the two, the relationship always holds <d. Therefore, in such a case, since the locking portion 23 is made of metal, it acts elastically to tighten and hold the plug 20. The plug 20
Even if the plug 20 is repeatedly inserted into and removed from the sleeve 9, more precisely, the locking portion 23, the plug 20 always remains securely fixed without moving in the direction perpendicular to the optical axis 18.

The method for forming the locking portion 23 is as follows: (1) After finishing the inner diameter of the sleeve 9 made of a circular metal tube to be slightly larger than the outer diameter d of the plug 20, the inner end portion of the sleeve 9 is formed. After making the slit 22, the sleeve 9
Bend the inner end of the plug 20 inward to obtain the inner diameter D of the tip of the plug 20!
is the same as or smaller than the outer diameter d of the slit 22. (2) A slit 22 is formed at one end of the metal circular tube whose inner diameter is smaller than the diameter d of the plug 20.
There is a method in which the inner diameter of the circular tube except for the one end is made equal to or slightly larger than the outer diameter d of the plug 20.

Note that the materials 4 for each of the metal parts of the optoelectronic device 1 with a receptacle are not particularly specified, but -
The highly precisely adjusted optical coupling state is adjusted to 1 by the influence of heat.
In order to avoid any loss of energy, it is necessary that each component that affects the optical coupling state has a linear expansion coefficient of one or a similar one.

Such a receptacle-equipped optoelectronic device 1 can be manufactured using the following method 1.
You can assemble it with your head. That is, the optoelectronic device 2 is inserted into the cylindrical body 5 which is not fixed to the receptacle body 4 and is fixed by welding. Meanwhile, the inner side of the sleeve 9 is inserted into the receptacle body 4, and then the receptacle housing 8 is screwed into the receptacle body 4. Thereby, the sleeve 9 is fixed to the receptacle main body 4 and the receptacle housing 8.

Next, the plug 20 is inserted into the sleeve 9.

The tip of the plug 20 is connected to the stop portion 10 of the receptacle body 4.
It comes into contact with and stops. The plug 20 is held without movement as a result of the elastic action of the locking portion 23 of the sleeve 9 in the direction of the optical axis 18. Therefore, by screwing and fixing an optical connector (not shown) to the receptacle housing 8, , the plug 20 is fixed to the receptacle 3 without coming off.

Next, the tip of the cylindrical body 5 to which the photoelectronic bag 12 is attached is abutted against the flat surface of the receptacle body 4 on the opposite side and fixed to the receptacle body 4 by welding. Prior to this fixation, a predetermined voltage is applied to the optoelectronic device 2. As a result, the photoelectronic bag 2 emits laser light from a transparent window (not shown) in the ceiling of the package 6. Therefore, this laser beam is taken into the optical fiber 21 held by the plug 20, and the V of the optical fiber 21 is
The laser light output (fiber light output) emitted from fa is detected, and the optoelectronic device 2 is controlled to move to the position where the fiber light output is maximized. The cylindrical body 5 is welded to the septacle main body 4 at the position where the fiber light output is greatest. This first photoelectron! According to the relative positioning of the built-in optical element, that is, the laser diode, and the plug 20 output, even if the optical connector is loosened, the plug 20 is removed, and the plug 20 is reinstalled. As described above, as a result of the locking part 23 of the sleeve 9 elastically tightening and fixing the inner part of the plug 20, no gap is generated in the fixed part, and the plug 20 is not moved in the direction perpendicular to the optical axis. It stops moving. Further, since this optoelectronic device with an optical coupler can always hold the plug 20 in the same state, it is possible to always fix the plug 20 as initially set, and the optical coupling state does not change. Therefore, the fiber optical output of the optoelectronic device with optical coupling is always set high.

According to such an embodiment, the following effects can be obtained.

(1) In the optoelectronic device with a receptacle of the present invention,
When the plug of an optical connector is inserted into the sleeve of the receptor, the locking part of the sleeve acts to elastically tighten the plug, so that the plug always moves in a direction perpendicular to the optical axis even if it is repeatedly inserted and removed. This has the effect of being retained without any problems.

(2) According to the above (1), in the optoelectronic device with optical coupling of the present invention, the optical fiber held by the plug is located at the center of the plug, and as a result, the plug inserted into the sleeve and the optoelectronic device If the sleeve is set to a high optical coupling state and fixed, even if the plug is repeatedly inserted and removed, the effect is that the sleeve can maintain the high optical coupling state with the optoelectronic device as originally set. It will be done.

(3) According to (2) above, the photocoupler ?=J optoelectronic device of the present invention can always obtain a high optical coupling state even if the plug is repeatedly inserted and removed, and has the effect of having a high IS gradient. is obtained.

(4) In the optoelectronic device with optical coupling of the present invention, the sleeve into which the plug is inserted has a structure in which the inner end gradually narrows, and the plug is elastically held in the sleeve by simply inserting it. Therefore, it is possible to easily attach and detach the plug, thereby increasing workability.

(5) The optoelectronic mW with optical coupler of the present invention has a structure in which the inner end of the sleeve into which the plug is inserted gradually narrows, and the plug is elastically held in the sleeve by simply inserting it. Therefore, the manufacturing cost can be reduced.

(6) According to the above (1) to (5), according to the present invention, a synergistic effect is obtained in that a receptacle-equipped optoelectronic device with high reliability of optical coupling can be provided at a low cost.

Although the invention made by the present inventor has been specifically explained above based on Examples, it goes without saying that the present invention is not limited to the above Examples and can be modified in various ways without departing from the gist thereof. For example, as shown in FIG. 5 and FIG.
In other words, these protrusions 30 elastically tighten and fix the plug 20, so that the plug 20 does not move in the direction perpendicular to the optical axis 18.

Therefore, in an optoelectronic device with optical coupling incorporating the sleeve 9 having such a protrusion 30, the plug 2
Even if zero desorption is repeated, high optical coupling efficiency can always be maintained. Note that in this structure, the protrusion 30
Even if three or more are provided at intervals of 120 degrees and 1.1 degrees, the same effect as that of the above embodiment can be obtained.

The above explanation mainly applies the invention made by the present inventor to the manufacturing technology of an optoelectronic device with optical coupling, which uses a laser diode as a light emitting source for optical communication, which is the field of application that became the FM. Although the case has been described, the present invention is not limited thereto, and can be applied to the manufacturing technology of a receptacle-equipped optoelectronic device that includes a optoelectronic device in which a light emitting diode element that emits light and a light receiving element that receives light are built in a pan cage.

〔Effect of the invention〕

The effects obtained by typical inventions disclosed in this application are explained in Section +6 as follows.

In the optoelectronic device with an optical coupler of the present invention, in the receptacle as the optical coupler and the optical connector, the inner end portion of the sleeve of the receptacle is narrowly sandwiched and partitioned by a plurality of slits to act elastically. When the plug of the optical connector is inserted into this sleeve, the locking part elastically tightens the plug, so that the plug is rotated in a direction perpendicular to the optical axis. CJ is gone. Therefore, after the optical coupling between the plug that guides the optical fiber and the optical element attached to the receptacle side has been established, even if the optical connector is loosened or tightened to connect and remove the plug, the plug will always remain in a state with no play. is fixed, the optical coupling state between the optical element and the optical fiber held by the plug can always maintain the initial setting state, and highly accurate optical coupling can be performed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an optoelectronic device with a receptacle and an optical connector plug according to an embodiment of the present invention, FIG. 2 is a sectional view showing an optoelectronic device with a receptacle equipped with an optical connector plug, and FIG. Similarly, FIG. 4 is a sectional view showing the sleeve of the receptacle, and FIG. 4 is a left side view. FIG. 5 is a sectional view showing a sleeve of a receptacle according to another embodiment of the present invention, and FIG. 6 is a left side view thereof. l...optoelectronic device with receptacle, 2. optoelectronic device,
3... Receptaru, 4... Receptaru body, 5
...Cylinder, 6...Package, 7...Lead, 8
...Receptor housing, 9...Sleeve, 1
0... Stop part, 11... Cylindrical part, ]2... Male thread, 13... Light transmission hole, 14... Female thread, 15... Fixing part, 16... Flange, 17... Navy blue screw, 18... Optical axis, 20... Plug, 21... Optical fiber, 22...
...Slit, 23...Locking part, 30...Protrusion, 3
1...Locking part. Fig. 1 Fig. 3 Fig. 4 Fig. 2 Fig. 5 Fig. 6 Fig. 21-Yafu 1 Iha' 22-Slip, outside 23-Special 2 upper part

Claims (1)

[Scope of Claims] 1. An optoelectronic device with an optical coupler having a tubular sleeve into which a plug holding an optical component serving as an optical transmission medium is inserted, the sleeve fixing the plug without any gaps. 1. An optoelectronic device with a photocoupler, characterized in that it has a locking portion. 2. The outer diameter of the sleeve gradually decreases as the inner end approaches the tip, and the inner end is provided with at least one slit extending in the axial direction to provide elasticity against the plug. 2. The optoelectronic device with an optical coupler according to claim 1, further comprising a locking portion that comes into contact with the optical coupler. 3. A protrusion is provided on the inner peripheral surface of the sleeve, and the protrusion serves as a locking portion to elastically contact the plug. The optoelectronic device with a photocoupler according to item 1.