WO2020181969A1 - Module optique - Google Patents

Module optique Download PDF

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Publication number
WO2020181969A1
WO2020181969A1 PCT/CN2020/075973 CN2020075973W WO2020181969A1 WO 2020181969 A1 WO2020181969 A1 WO 2020181969A1 CN 2020075973 W CN2020075973 W CN 2020075973W WO 2020181969 A1 WO2020181969 A1 WO 2020181969A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
filter
lens assembly
optical
fixing seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/075973
Other languages
English (en)
Chinese (zh)
Inventor
刘旭霞
钟岩
邵乾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Broadband Multimedia Technology Co Ltd
Original Assignee
Hisense Broadband Multimedia Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910189746.4A external-priority patent/CN111694108A/zh
Priority claimed from CN201910187738.6A external-priority patent/CN111694107A/zh
Priority claimed from CN201920323416.5U external-priority patent/CN209707741U/zh
Application filed by Hisense Broadband Multimedia Technology Co Ltd filed Critical Hisense Broadband Multimedia Technology Co Ltd
Publication of WO2020181969A1 publication Critical patent/WO2020181969A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements

Definitions

  • This application relates to the field of optical communication technology, and in particular to an optical module.
  • the lens assembly in the optical module is integrally formed by injection molding.
  • the light emitting chip laser chip
  • the light receiving chip on the printed circuit board
  • cover the lens assembly on the printed circuit board which is simple
  • the coupling of the lens assembly and the laser chip, the light receiving chip and other electrical devices is realized, the operation is convenient and the cost can be reduced.
  • the filter of the optical module is mounted on the optical transmission path inside the lens assembly.
  • the present application provides an optical module, and a filter is arranged on a lens assembly to form a light transmission path.
  • optical module including:
  • the lens assembly is covered on the laser chip and the light receiving chip, and includes a light reflecting surface, a supporting inclined surface, and a concave surface recessed relative to the supporting inclined surface;
  • the filter is arranged on the supporting slope, and the gap between the concave surface and the filter is filled with glue;
  • the light reflection surface can reflect the light from the laser chip; the filter can transmit the light reflected by the light reflection surface; the filter can reflect the light from the outside of the optical module to the light receiving chip.
  • Fig. 1 is a schematic diagram showing the overall structure of a packaged optical module according to an exemplary embodiment of this specification.
  • Fig. 2 is a schematic diagram showing the overall disassembly of the optical module according to an exemplary embodiment of this specification.
  • Fig. 3 is a partial split schematic diagram of the optical module according to an exemplary embodiment of the present specification.
  • Fig. 4 is a partial perspective view of a lens assembly in an optical module according to an exemplary embodiment of this specification.
  • Fig. 5 is a side plan view of the lens assembly 6 according to an exemplary embodiment of this specification.
  • Fig. 6 is a side plan view of the optical filter when the filter is fixed in the lens assembly according to an exemplary embodiment of the specification.
  • Fig. 7 is a cross-sectional view of the lens assembly according to an exemplary embodiment of the specification.
  • FIG. 8 is an enlarged schematic diagram of another partial structure of the lens assembly in the embodiment of the specification.
  • FIG. 9 is a schematic diagram of the structure of the optical fiber end fixing seat and the optical fiber external plug in the application after being connected.
  • FIG. 10 is a schematic diagram of the exploded structure of the optical fiber end fixing seat and the optical fiber external plug in this application.
  • FIG. 11 is a schematic diagram of the structure of the optical fiber end fixing seat connected to the optical fiber external plug through the optical fiber in this application.
  • Fig. 12 is another angle view of the optical fiber end fixing seat and the optical fiber external plug in Fig. 10.
  • Fig. 13 is a perspective view of an embodiment of an optical fiber end fixing seat of the present application.
  • Fig. 14 is an enlarged view of A in Fig. 13.
  • Fig. 15 is a schematic diagram of the positional relationship between the fiber end fixing seat and the laser cutter of the present application.
  • FIG. 16 is a schematic diagram of the surface structure of the optical fiber end fixing seat in FIG. 13.
  • Fig. 17 is another angle view of the optical fiber end fixing seat in Fig. 16.
  • FIG. 18 is a schematic structural diagram of another embodiment of the fiber end fixing seat of this application.
  • Fig. 1 is a schematic diagram of the overall structure of the optical module after being packaged.
  • the optical module includes a circuit board 1 inside, and the circuit board is used to realize the conversion of electrical signals to light beams or the conversion of external light beams to electrical signals.
  • the optical module is assembled by the lower housing 3 and the upper housing 4 by buckling and packaging each other.
  • the optical module sends the light beam generated by the operation of the internal circuit board 1 to an external optical fiber and/or receives the light beam in the external optical fiber, and converts the light beam into an electrical signal through the circuit board.
  • Fig. 2 is a schematic diagram showing the overall disassembly of the optical module according to an exemplary embodiment of this specification.
  • the optical module includes a circuit board 1, a light receiving chip 7 and a laser chip 8, wherein the laser chip 8 and the light receiving chip 7 are arranged in line along the optical fiber direction on the On the surface of the circuit board, the light receiving chip 7 is used to receive the light beam transmitted by the external optical fiber and convert it into an electrical signal, and the laser chip 8 is used to convert the electrical signal into a light beam and transmit it to the external optical fiber;
  • the optical module is also It includes a lens assembly 6, which is covered on the laser chip 8 and the light receiving chip 7, and is used to change the propagation direction of the light beam;
  • the optical module also includes the filter 9, the The filter 9 is fixed in the lens assembly 6 and is used to cooperate with the lens assembly 6 to separate the light beam emitted by the laser chip 8 from the light beam received from the outside.
  • the optical module further includes an optical fiber ribbon 13, one end of the optical fiber ribbon 13
  • Fig. 3 is a partial split schematic diagram of the optical module according to an exemplary embodiment of the present specification.
  • the circuit board 1 also includes a first driving chip 71 on the side of the light receiving chip 7, and the first driving chip 71 is used to drive the light receiving chip 7 to be received by the outside. The received light beam is converted into an electrical signal; the circuit board 1 also includes a second drive chip 81 on the side of the laser chip 8, and the second drive chip 81 is used to drive the laser chip 8 to internally The signal is converted into a light beam sent to the outside.
  • the light receiving chip 7 and the laser chip 8 are lined up along the optical fiber direction, and the lens assembly is covered on the laser chip and the light receiving chip.
  • the light beam emitted by the laser chip 8 is incident perpendicularly to the lens assembly 6, and the light receiving chip 7 receives the light beam emitted by the lens assembly 6 vertically.
  • the optical path of the light beam emitted by the external optical fiber and/or the light beam emitted by the external optical fiber to the light receiving chip in the lens assembly is along the direction of the optical fiber, and the light receiving chip 7 and the laser chip 8 are aligned along the optical fiber direction. It can be seen that the optical path of the light beam emitted by the laser chip 8 to the external optical fiber in the lens assembly 6 and the optical path of the light beam emitted by the external optical fiber to the light receiving chip 7 in the lens assembly 6 overlap, and they are all along Fiber direction.
  • the light beam emitted by the external optical fiber to the light receiving chip 7 is reflected by the reflective surface of the filter, and then vertically directed toward the light receiving chip 7, and the light beam emitted by the laser chip 8 is transmitted by the filter in the lens assembly.
  • the other side of the optical fiber is injected, and the filter is emitted to the external optical fiber.
  • the light receiving chip 7 and the laser chip 8 arranged in line along the optical fiber direction on the circuit board 1 are a group, and multiple groups of light receiving chips arranged in line along the optical fiber direction can be arranged side by side on the circuit board 1. 7 and laser chip 8.
  • the lens assembly 6 is connected with an optical fiber ribbon 13, the light beam emitted by the laser chip 8 is sent to the optical fiber ribbon 13 through the lens assembly, and the optical fiber ribbon 13 sends the light beam to be sent to the light receiving chip 7 through the lens assembly.
  • Fig. 4 is a partial perspective view of a lens assembly in an optical module according to an exemplary embodiment of this specification.
  • the lens assembly 6 includes a light reflecting surface 601 and a supporting inclined surface 602.
  • the light reflecting surface 601 is arranged above the laser chip, and the propagation direction of the light beam emitted by the laser chip is changed from perpendicular to the optical fiber. The direction is converted to the same direction as the fiber direction.
  • the supporting inclined surface 602 is arranged above the light receiving chip, and the light beam in the external optical fiber is reflected by the reflecting surface of the filter on the supporting inclined surface to vertically enter the light receiving chip.
  • the lens assembly further includes a concave cavity 604 located in the middle of the supporting slope, and a cavity 605 between the supporting slope and the light reflecting surface 601 (because FIG. 4 is a perspective view, the The specific arrangement of the recessed cavity and the cavity can be seen in Figure 5).
  • the supporting inclined surface is close to the external optical fiber relative to the light reflection surface, that is, the recessed cavity 604 is close to the external optical fiber relative to the cavity 605. Since the light reflecting surface 601 in the lens assembly is arranged directly above the laser chip 8, the laser chip 8 is driven to emit a light beam perpendicular to the optical fiber direction, and the light beam hits the light reflecting surface 601 perpendicularly.
  • the propagation direction of the reflected light beam is converted to be consistent with the direction of the optical fiber.
  • the reflected light beam first hits the cavity 605, and then hits the filter on the support slope, passing through all After the filter, the light beam enters the recessed cavity, and finally enters the external optical fiber.
  • the recessed cavity 604 is used to provide an interface between the air and the filter to meet the refractive index requirement of light reflection.
  • the optical fiber When there is a light beam transmitted to the light receiving chip 7 in the external optical fiber, the optical fiber emits the light beam into the recessed cavity, because the supporting slope 602 in the lens assembly is arranged on the front side of the light receiving chip.
  • the surface where the filter is in contact with the support slope 602 is the reflective surface of the filter, that is, the reflective surface of the filter is located directly above the light receiving chip 7, and the optical fiber faces the recessed cavity 604
  • the light beam emitted in the filter is directed to the reflecting surface of the filter, and after reflection, the direction of the light beam is changed from being consistent with the direction of the optical fiber to being perpendicular to the light receiving chip 7, and finally, the reflected light beam is emitted perpendicularly
  • the light receiving chip 7 is driven to work, and converts the received light beam into an electrical signal.
  • the filter is disposed on the supporting slope, and the light reflecting surface 601 is parallel to the supporting slope 602, that is, the light reflecting surface 601 is parallel to a surface of the filter.
  • a supporting bottom surface 603 is also provided in the lens assembly.
  • the supporting slope 602 intersects the supporting bottom surface 603 to form a card slot, and the filter is mounted Set in the card slot.
  • the inclination angle of the supporting inclined surface 602 is a clockwise inclined angle of 45 degrees.
  • the angle formed by the intersection of the supporting inclined surface 602 and the supporting bottom surface 603 is 90 degrees.
  • the filter is fixed, it is locked in the slot formed by the intersection of the support slope and the support bottom surface, so the angle formed by the intersection of the support slope and the support bottom surface matches the structure of the filter.
  • the filter is a rectangular parallelepiped or a cube in a square structure, so when the filter is placed obliquely in the slot, the angle of the slot is 90 degrees.
  • the angle formed by the intersection of the supporting surface and the supporting surface can also be set according to the actual structure of the filter.
  • FIG. 5 is a side plan view of the lens assembly 6 in the embodiment of this specification. It can be seen from FIG. 5 that the filter 9 can be placed on the support slope 602, and snapped into the slot formed by the support slope 602 and the support bottom surface 603; the filter is fixed on the support After the inclined surface 602 is on, there is a cavity 605 between one side of the supporting inclined surface 602 and the light reflecting surface 601. When the light beam emitted by the laser chip is reflected by the light reflecting surface 601, it enters the cavity along the direction of the optical fiber.
  • the incident light beam of the laser chip passes through the filter 9 and then is emitted to the recessed cavity 604
  • the external optical fiber, or the light beam sent by the external optical fiber passes through the recessed cavity 604, is directed to the reflective surface of the filter, is reflected by the reflective surface of the filter, and is emitted to the light receiving chip.
  • the function of the recessed cavity 604 is to form an interface between the air and the filter to meet the refractive index requirement of light reflection.
  • the lens assembly 6 further includes a concave surface 606 that is concave relative to the supporting inclined surface, and the gap between the concave surface and the filter is filled with glue .
  • the surfaces on both sides of the supporting slope are gradually recessed, respectively forming concave surfaces 606 lower than the supporting slope; that is, the supporting slope relative to the concave surface is An inclined surface protruding upward, the supporting inclined surface may be parallel to the concave surface.
  • the filter 9 when the filter 9 is fixed, the filter is first placed in the slot formed by the intersection of the support slope and the support bottom surface, and then the recessed surface 606 and the filter 9
  • the adhesive glue is filled in between, and after the adhesive glue is solidified, the filter is fixed by the adhesive glue, and the concave surface 606 is used to accommodate the adhesive glue for fixing the filter.
  • the filter is arranged on the support slope, the area of the filter is larger than the area range of the support slope, and a part of the area of the filter exceeds the range of the support slope; specifically, the edge of the support slope is sunk to form a concave surface, the filter The part of the sheet beyond the support slope is located above the recessed surface.
  • a gap is formed between the portion of the filter that exceeds the support slope and the recessed surface. Glue is dispensed in this gap. In this way, the glue adheres to the filter through the recessed surface.
  • the support slope is a different surface, that is, it avoids dispensing glue on the support slope, and dispensing glue on the concave surface, so that the adhesive glue is completely filled between the concave surface 606 and the filter 9. Realize the fixation of the filter, so when the filter 9 is pressed on the supporting slope, there will be no impact on the light-transmitting surface of the filter caused by the glue squeezing to both sides, and there will be no influence due to the glue. The unevenness causes the tilt angle of the filter to change.
  • FIG. 7 is a cross-sectional view of the lens assembly in the embodiment of this specification.
  • the lens assembly 6 has an inclined light reflection surface 601 and a supporting inclined surface 602; Wherein, the supporting inclined surface is parallel to the light reflecting surface, and the inclined angle of the supporting inclined surface is a clockwise inclined angle of 45 degrees.
  • There is a recessed cavity 604 on one side of the supporting inclined surface the specific function of which has been described in detail above and will not be repeated here. Based on Figure 7, when the laser chip emits the light beam and the light receiving chip receives the light beam, the specific light paths in the lens assembly are as follows:
  • the light beam emitted by the laser chip is reflected by the light reflection surface 601, passes through the cavity 605, passes through the filter 9, and then enters the external optical fiber through the recessed cavity 604.
  • the light receiving chip When the light receiving chip receives the light beam, the light beam emitted by the external optical fiber passes through the recessed cavity 604, is reflected by the reflective surface of the filter 9, and then vertically enters the light receiving chip.
  • the supporting inclined surface 602 in the lens assembly borders the concave surface 606, and glue is filled between the concave surface and the filter.
  • the lens assembly 6 further includes a dispensing groove 607 adjacent to the concave surface 606, and the dispensing groove 607 is used for accommodating a dispensing needle .
  • a dispensing syringe is used to inject adhesive glue between the concave surface and the filter, and the dispensing needle used in this syringe is generally small and easy to lose.
  • the dispensing slot 607 is designed , To store the corresponding dispensing needle and package it inside the lens assembly to prevent the loss of the dispensing needle.
  • the dispensing needle is directly taken out of the dispensing groove for use, Has better convenience in use.
  • a shallow groove 608 is also provided above the lens assembly 6.
  • a cover plate can be placed in the shallow groove 608, and the optical path components such as the filter in the lens assembly are covered by the cover plate.
  • adhesive glue can be applied to the periphery of the shallow groove 608, and then the cover plate is placed in the shallow groove 608 and passed through the adhesive glue Adhere to the shallow groove.
  • concave glue grooves 609 are respectively set around the shallow groove 608 to accommodate the bonding of the adhesive cover. glue.
  • FIG. 8 is an enlarged schematic diagram of another partial structure of the lens assembly in the embodiment of the specification.
  • the structure of the light reflecting surface 601, the supporting bottom surface 603, the recessed cavity 604, the dispensing groove 607, the shallow groove 608, and the glue groove 609 recessed around the shallow groove in FIG. The functions have been described in detail above, so I won't repeat them here.
  • a plurality of internal through holes are provided between the supporting inclined surface 602 and the recessed surface 606, and the glue dispensing needle passes the adhesive through the internal through holes from the recessed surface. 606 is injected into the support slope surface.
  • the supporting inclined surface 602 is provided with a plurality of first holes 611
  • the concave surface 606 is provided with a plurality of second holes 610
  • the first holes 611 and the second holes 610 correspond one-to-one.
  • And is internally connected.
  • the adhesive glue on the surface of the hole contacts and then adheres; at the same time, after the adhesive between the first hole and the second hole is gelled and fixed, then glue is further filled between the concave surface and the filter to ensure In order to further bond the filter and the adhesive glue, through the above method, the fixing of the filter is more reliable, and the inclination angle of the filter is not affected, and the glue that may be caused by directly applying glue on the support slope is avoided Contamination filters and other optical components flow out.
  • the lens assembly has an integral structure formed by injection molding.
  • the material used in the lens assembly is polyetherimide.
  • PEI polyetherimide
  • the lens assembly has the best high temperature resistance and dimensional stability.
  • Lens components molded from this kind of material also have high temperature resistance and stability, as well as chemical resistance, flame retardancy, electrical properties, high strength, high rigidity, etc.
  • a vent hole is also provided in the lens assembly. Due to the design requirements of the optical path elements in the lens assembly and the corresponding optical path, there are multiple hollow cavities in the lens assembly for providing transmission paths for light.
  • the lens assembly is fixed on the printed circuit board, because the lens assembly is set as a closed space, if the air in the cavity is easy to expand, the air pressure in the space will increase, which will change the fixed position of the optical path components such as filters , Resulting in changes in the optical transmission path, affecting the accuracy of photoelectric signal conversion. Therefore, the lens assembly is provided with an exhaust hole for exhausting the air in the cavity. After the air is exhausted, the exhaust hole is blocked to complete the sealing of the lens assembly.
  • the above embodiments describe the structural limitation relationship between the optical filter in the optical module and the supporting slope for fixing the optical filter, but the number of optical filters in the optical module is not limited.
  • the optical module There can be multiple obliquely placed filters and corresponding supporting slopes. The positional relationship of multiple filters can be juxtaposed with each other or other arrangement order. The arrangement order is not limited, and can be based on actual needs. set up.
  • FIG. 9 is a schematic diagram of the structure of the optical fiber end fixing seat and the optical fiber external plug in the application after being connected.
  • the fiber end fixing seat 11 is connected to the lens assembly 6, and one end of the optical fiber ribbon 13 is inserted into the fiber end fixing seat 11 and fixed by the fiber end fixing seat 11, so that one end of the optical fiber ribbon 13 and The lens components 6 can transmit optical signals stably, and the other end of the optical fiber ribbon 13 is inserted into the optical fiber external plug 14 and fixed by the optical fiber external plug 14.
  • the optical fiber external plug 14 is inserted into the connector 2 and combined to form a universal interface for connecting with an external optical fiber.
  • FIG. 10 is a schematic diagram of the exploded structure of the optical fiber end fixing seat and the optical fiber external plug in this application
  • FIG. 11 is a structural diagram of the optical fiber end fixing seat after being connected to the optical fiber external plug in this application.
  • the optical fiber end fixing seat 11 faces the end surface 111 of the lens assembly 6 with an optical fiber hole 1113, and an optical fiber ribbon 13 is inserted into the optical fiber hole 1113, and the optical fiber ribbon 13 extends out of the fiber end to be fixed. ⁇ 11’s end surface 111.
  • Fig. 12 is another angle view of the optical fiber end fixing seat and the optical fiber external plug in Fig. 10. As shown in FIG. 11 and FIG. 12, the end face of the lens assembly 6 butted with the fiber end fixing seat 11 is also provided with a light transmission hole 123.
  • two positioning holes 1114 can be opened on the end surface 111 of the fiber end fixing seat 11, and positioning posts 122 are provided at positions corresponding to the two mounting holes 114 of the lens assembly 6, and the two positioning posts 122 are inserted into the corresponding positioning holes.
  • the optical fiber ribbon 13 and the lens assembly 6 are positioned and connected.
  • a positioning groove 1122 can also be provided on the side of the optical fiber end fixing seat 11, and the lens assembly is provided with a supporting plate 612 (as shown in FIG. 5).
  • the positioning groove 1122 is used to cooperate with the supporting plate 612 on the lens assembly to
  • the fiber end fixing seat 11 is fixed on the lens assembly 6 (as shown in FIG. 3).
  • the fiber end fixing seat 11 and the lens assembly 6 and the PCB board 15 can also be connected by pasting or screw fixing to further improve the positioning effect of the fiber end fixing seat 11.
  • the top surface 112 of the fiber end fixing seat 11 is also provided with a dispensing hole 1112 communicating with the fiber hole 1113.
  • a dispensing hole 1112 communicating with the fiber hole 1113.
  • FIG. 13 is a perspective view of an embodiment of an optical fiber end fixing seat of this application;
  • FIG. 14 is an enlarged view of A in FIG. 13.
  • the optical fiber hole 1113 may include a first hole section 11131, a transition section 11132, and a second hole section 1115c that are sequentially connected in a direction away from the end face 111.
  • the diameter of the hole section 11131 is smaller than the diameter of the second hole section 11133, and the diameter of the first hole section 11131 is substantially the same as the diameter of the exposed part of the optical fiber ribbon 13, so as to accommodate the exposed part of the optical fiber ribbon 13 and have the end of the optical fiber ribbon 13 Good limiting effect;
  • the diameter of the second hole section 11133 is greater than or equal to the diameter of the protective layer of the optical fiber ribbon 13 to accommodate the protective layer of the optical fiber ribbon 13;
  • the inner diameter of the transition section 11132 is along the first The direction of the hole section 11131 to the second hole section 11133 is gradually expanded, so that the inner surface of the transition section 11132 can play a guiding role, so that the end of the optical fiber ribbon 13 can be quickly and accurately inserted into the first hole section 11131.
  • the second hole section 11133 and the dispensing hole 1121 cross, so that after the optical fiber ribbon 13 passes through the second hole section 11133, a part of the optical fiber ribbon 13 is located in the dispensing hole 1121 and is fixed by the glue hole 1121.
  • An entrance 113 for inserting the optical fiber ribbon 13 is also opened at the end of the fiber end fixing seat 11 away from the end face 111.
  • the entrance 113 is connected with the plurality of second hole sections 11133, and the plurality of optical fiber ribbons 13 entering the entrance 113 will be inserted Into different fiber holes 1113 and extend from different positions of the end surface 111, so that the optical signal in the fiber ribbon 13 is transmitted to the light transmission hole 123 of the lens assembly 6 through the end surface 111 of the fiber end fixing seat 11, or, The optical signal emitted by the laser chip into the lens assembly 6 enters the optical fiber ribbon 13 through the end face 111 of the optical fiber end fixing seat 11.
  • Fig. 15 is a schematic diagram of the positional relationship between the fiber end fixing seat and the laser cutter of the present application.
  • the optical fiber ribbon 13 is usually passed through the fiber hole 1111 in the optical fiber end fixing seat 11, and the end of the optical fiber ribbon 13 is protruded from the optical fiber end. After fixing the end surface 111 of the fixing seat 11, as shown in FIG.
  • the optical fiber ribbon 13 protruding from the end surface 111 can be cut by the laser cutter 20 to shape the end surface of the optical fiber ribbon 13 so that the The optical signal can be transmitted into the lens assembly 6 through the end face 111 of the fiber end fixing seat 11, or the optical signal emitted by the laser chip into the lens assembly 6 passes through the end face 111 of the fiber end fixing seat 11 and enters the optical fiber ribbon 13 Inside.
  • the laser cutter 20 is used to cut the optical fiber ribbon 13 protruding from the end face 111, which can also shorten the length of the optical fiber ribbon 13 protruding from the end face 111.
  • the laser 21 generated by the laser cutter 20 has a certain divergence angle.
  • the laser cutter 20 When the laser cutter 20 is used to cut the portion of the optical fiber ribbon 13 protruding from the end surface 111 of the fiber end fixing seat 11, the laser cutter 20 generates The laser 21 may interfere with the end face 111 of the optical fiber end holder 11, causing the end face 111 of the optical fiber end holder 11 to be burned and produce fine chips. These fine chips will easily affect the already-cut fiber ribbon after being diffused into the air.
  • the end surface of the optical fiber 13 is contaminated, so that the end surface of the optical fiber ribbon 13 needs to be cleaned with an air gun and alcohol cotton. As a result, the cleaning time of the optical fiber end fixing seat 11 is lengthened, and the production efficiency of the optical module 10 is reduced.
  • this application proposes an optical fiber end fixing seat.
  • FIG. 16 is a schematic diagram of the surface structure of the optical fiber end fixing seat in FIG. 13;
  • FIG. 17 is another angle view of the optical fiber end fixing seat in FIG. 16.
  • the optical fiber end fixing seat 11 has an end surface 111 facing the lens assembly 6, and an optical fiber hole 1113 is opened on the end surface 111.
  • the optical fiber hole 1113 is used for the optical fiber ribbon 13 to pass through to allow the optical fiber
  • the strap 13 can extend out of the end surface 111 of the fiber end fixing seat 11.
  • a recess 1111 may be formed on the edge of the end surface 111 of the optical fiber end fixing seat 11.
  • the recessed portion 1111 is inwardly recessed from the end surface 111 of the fiber end fixing seat 11, a certain distance is maintained between the bottom surface of the recessed portion 1111 and the laser 21, and will not be burned by the laser 21, so it will not The generation of fine debris contaminates the end face of the optical fiber ribbon 13, which makes the cleaning of the end of the optical fiber ribbon 13 more convenient, thereby reducing the cleaning time of the end face of the optical fiber ribbon 13 and improving the production efficiency of the optical module 10.
  • the fiber holes are arranged laterally on the end surface, and the lateral size of the multiple fiber holes connected together is less than or equal to the lateral size of the recessed surface; because the fiber extends from the fiber hole
  • the end face of the fiber end fixing seat is provided with a recess in the laser path. If each fiber is cut, the optical path after laser cutting each fiber needs to be provided with a recess; Therefore, the lateral size of the recess must be greater than or equal to the size of the multiple fiber holes connected together to ensure that each fiber will not be cut to the end surface when cutting each fiber.
  • the lateral dimension of the recessed portion 1111 may be smaller than the lateral dimension of the end surface 111 of the fiber end fixing seat 11, or the lateral dimension of the recessed portion 1111 and the end surface 111 of the fiber end fixing seat 11
  • the lateral dimensions are equal, that is, the lateral ends of the recess 1111 directly extend to the opposite sides of the fiber end fixing seat 11.
  • the recessed portion 1111 can be extended from the edge of the end surface 111 of the fiber end fixing seat 11 toward the fiber hole 1113 to increase the area of the recessed portion 1111 as much as possible, so that the end surface of the fiber end fixing seat 11 is burned by the laser 21 The possibility is lower, thereby further improving the production efficiency of the optical module 10.
  • the recessed portion 1111 may be rectangular, trapezoidal, etc., which may be specifically determined according to the structure of the fiber end fixing seat 11 and the arrangement of the fiber holes 1113.
  • the number of fiber holes 1113 in the fiber end fixing seat 11 is multiple, and the multiple fiber holes 1113 are arranged in a "one" shape, the recessed portion 1111 is rectangular, and the recessed portion 1111 The side close to the plurality of fiber holes 1113 extends along the arrangement direction of the plurality of fiber holes 1113.
  • the depth of the recessed portion 1111 from the end surface 111 can be greater than or equal to 0.02 mm to ensure that when the laser cutter 20 cuts the optical fiber ribbon 13, there is a gap between the bottom surface of the recessed portion 1111 and the laser 21 There is sufficient clearance so that the end surface 111 of the optical fiber end fixing seat 11 will not be burned.
  • the depth of the recessed portion 1111 from the end surface 111 can be less than or equal to 2 mm, so as to avoid the depth of the recessed portion 1111 being too deep and affecting the strength of the fiber end fixing seat 11, or to prevent the fiber end fixing seat 11 from being too deep.
  • the other structure of the impact can be less than or equal to 2 mm, so as to avoid the depth of the recessed portion 1111 being too deep and affecting the strength of the fiber end fixing seat 11, or to prevent the fiber end fixing seat 11 from being too deep.
  • the specific depth of the recess 1111 may be 0.1 mm, 0.5 mm, 1 mm, etc., which may be specifically determined according to the structure of the fiber end fixing seat, which is not limited here.
  • the bottom surface of the recess 1111 can be a flat surface, an inclined surface, a curved surface, or an uneven surface, etc.
  • the recess 1111 can be opposed to the laser 21
  • the minimum depth of the part is greater than or equal to 0.02 mm to ensure that the part with the minimum groove depth at the bottom of the recess 1111 will not be burned by the laser 21.
  • the end surface 111 of the fiber end fixing seat 11 has a forming surface 1112, and the fiber hole 1113 opened on the end surface 111 of the fiber end fixing seat 11 is located on the forming surface On 1112, the optical fiber ribbon 13 passes through the optical fiber hole 1113 and then extends out of the forming surface 1112.
  • the forming surface is opposite to the recessed portion, and the relative form is further explained by a manufacturing process; in the process of forming the recessed portion, the end surface of the fiber end fixing seat is a flat surface as a whole, and recessed portions are provided on the edge of the end surface, and the recessed portions are opposite The flat surface and the depressed part, and the surface of the undepressed part outside the depressed part area is the forming surface.
  • the number of the recesses 1111 can be two, and the two recesses 1111 are distributed on opposite sides of the forming surface 1112. Therefore, when the laser cutter 20 emits the laser 21 along the arrangement direction of the two recesses 1111 to cut the optical fiber ribbon 13, the parts of the end surface 111 on both sides of the forming surface 1111 will not be burned.
  • the burn condition of the end surface 111 of the fiber end fixing seat 11 by the laser cutter 20 during the cutting of the optical fiber ribbon 13 it is possible to form only a recess on the end surface 111, and let the recess be located on the forming surface along the laser 21 One side of the launch direction.
  • a depression can be provided only on the upper side of the forming surface; when the end surface 111 of the optical fiber end fixing seat 11 is mainly the forming surface When the underside is burned, the depression may be provided only on the underside of the forming surface.
  • the width of the forming surface 1112 in the arrangement direction of the two recesses 1111 may be greater than or equal to 0.25 mm, so that the fiber end fixing seat 11 has a higher height at the fiber hole 1113.
  • Strength when the optical fiber ribbon 13 passes through the through hole, it has a better limiting effect on the optical fiber ribbon 13, avoiding large deformation of the optical fiber end fixing seat 11 after being subjected to external force, resulting in a large optical fiber ribbon 13 The displacement, thereby affecting the signal transmission.
  • the width of the forming surface 1112 in the arrangement direction of the two recessed portions 1111 may be less than or equal to 1.5 mm to prevent the forming surface 1112 from being too wide to cause the laser 21 to burn the forming surface 1112.
  • the width of the forming surface 1112 in the arrangement direction of the two recesses 1111 may be 0.4 mm, 0.5 mm, 1 mm, etc., which may be specifically determined according to the structure of the optical fiber end fixing seat 11.
  • the forming surface 1112 may be arranged in a rectangular shape, a plurality of fiber holes 1113 are arranged in sequence along the length direction of the forming surface 1112, and the fiber holes 1113 are located in the middle of the forming surface 1112 in the width direction, so as to form
  • the width of the surface 1112 is as small as possible, and at the same time, it has a better limiting effect on the optical fiber ribbon 13.
  • the two recesses 1111 can be symmetrically arranged on both sides of the forming surface 1112, or can be asymmetrically arranged, which can be specifically determined according to the structure of the fiber end fixing seat 11 .
  • the top surface 112 of the fiber end fixing seat 11 is provided with a glue hole 1121.
  • the glue hole 1121 will reduce the strength of the upper part of the fiber end fixing seat 11, in order to improve the fiber end fixing seat 11.
  • the strength of the upper part can increase the thickness of the upper part of the optical fiber end fixing seat 11.
  • the width of the upper recess 1111 will be greater than the width of the lower recess 1111.
  • the thickness of the upper part and the lower part of the fiber end fixing seat 11 can also be increased at the same time to improve the overall strength of the fiber end fixing seat 11.
  • the forming surface 1112 can be located between the two positioning holes 1114, and the recesses 1111 can be distributed on the side of the line connecting the two positioning holes 1114 to avoid interference between the recesses 1111 and the positioning holes 1114.
  • the structure of the optical fiber end fixing seat 11 is more reasonable.
  • the two recesses 1111 may be distributed on both sides of the line connecting the two positioning holes 1114.
  • the two recessed portions 1111 can also be distributed on both sides of the forming surface 1112 along the connecting direction of the two positioning holes 1114.
  • the positioning holes 1114 can be directly opened on the recessed portion 1111.
  • the plurality of fiber holes 1113 when a plurality of fiber holes 1113 are opened on the forming surface 1112, the plurality of fiber holes 1113 can be arranged in the connecting direction of the two positioning holes 1114, and the recessed portion 1111 can be arranged along the plurality of fiber holes.
  • the arrangement direction of 1113 extends.
  • the end surface 111a of the fiber end fixing seat 11a has a forming surface 1112a, and the fiber hole 1113a formed on the end surface 111a of the fiber end fixing seat 11a is located on the forming surface 1112a.
  • the bottom surface of the recessed portion 1111a and the forming surface 1112a can be adjacent to each other and arranged at an included angle, so that the processing of the recessed portion 1111a is more convenient.
  • the recessed portion 1111a is adjacent to the forming surface 1112a, there is no dead corner for cleaning. Therefore, the cleaning of the end surface 111a of the fiber end fixing seat 11a is more convenient.
  • the structure of the forming surface 1112a, and the number, structure and distribution of the fiber holes 1113a on the forming surface 1112a are basically the same as the structure of the forming surface 1112, and the number, structure and distribution of the fiber holes 1113 on the forming surface 1112. .
  • the number of the recessed portion 1111a may be one or two, and the positional relationship between the recessed portion 1111a and the forming surface 1112a can refer to the positional relationship between the recessed portion 1111 and the forming surface 1112 described above, which will not be repeated this time.
  • the angle formed by the bottom surface of the recessed portion 1111a and the forming surface 1112a may be less than or equal to 178°, so as to ensure that when the laser cutter 20 cuts the optical fiber ribbon 13, the bottom surface of the recessed portion 1111a There is a sufficient gap with the laser 21 so that the end face 111a of the fiber end fixing seat 11a will not be burned.
  • the angle formed by the bottom surface of the recessed portion 1111a and the forming surface 1112a can be greater than or equal to 110°, so as to avoid the inclination angle of the bottom surface of the recessed portion 111a being too large, resulting in a decrease in the strength of the fiber end fixing seat 11, or the Other structures on the end fixing seat 11 cause influence.
  • the fiber end fixing seat 11a may also include positioning holes 1114a and dispensing holes 1121a.
  • the shape, size and position of the positioning holes 1114a and dispensing holes 1121a are consistent with the positioning on the fiber end fixing seat 11.
  • the shape, size, and position of the hole 1114 and the dispensing hole 1121 are basically the same, and will not be repeated here.
  • connection mode of the optical fiber external plug 14 and the optical fiber ribbon 13 is basically the same as the connection mode of the optical fiber end fixing seat 11 and the optical fiber ribbon 13. Therefore, a recessed portion can also be provided on the end surface of the optical fiber external plug 14 to When the laser cutter cuts the optical fiber ribbon 13 protruding from the end face of the optical fiber external plug 14 for cutting, it avoids the laser to prevent the end face of the optical fiber external plug 14 from being burned by the laser.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un module optique, comprenant : une carte de circuit imprimé (1), un ensemble lentille (6), une puce laser (8), une puce de réception de lumière (7) et un filtre optique (9). La puce laser (8) et la puce de réception de lumière (7) sont disposées sur une surface de la carte de circuit imprimé (1) ; l'ensemble lentille (6) est recouvert sur la puce laser (8) et la puce de réception de lumière (7) ; et l'ensemble lentille (6) comprend une surface de réflexion de lumière (601), une surface inclinée de support (602) et une surface évidée (606) en retrait par rapport à deux côtés de la surface inclinée de support (602) ; le filtre optique (9) est disposé sur la surface inclinée de support (602), et de la colle est remplie entre la surface en retrait (606) et le filtre optique (9). De cette manière, lors de la fixation du filtre optique (9), tant que l'espace entre la surface évidée (606) et le filtre optique (9) est rempli de colle, les problèmes dans lesquels la colle s'écoule librement et la surface de transmission de lumière du filtre optique (9) est également collée sont évités.
PCT/CN2020/075973 2019-03-13 2020-02-20 Module optique Ceased WO2020181969A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201910189746.4A CN111694108A (zh) 2019-03-13 2019-03-13 一种光模块
CN201910187738.6 2019-03-13
CN201920323416.5 2019-03-13
CN201910189746.4 2019-03-13
CN201910187738.6A CN111694107A (zh) 2019-03-13 2019-03-13 一种光模块
CN201920323416.5U CN209707741U (zh) 2019-03-13 2019-03-13 一种光模块

Publications (1)

Publication Number Publication Date
WO2020181969A1 true WO2020181969A1 (fr) 2020-09-17

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Application Number Title Priority Date Filing Date
PCT/CN2020/075973 Ceased WO2020181969A1 (fr) 2019-03-13 2020-02-20 Module optique

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WO (1) WO2020181969A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12158610B2 (en) 2019-10-25 2024-12-03 Commscope Technologies Llc Integrated optical wavelength division multiplexing devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751373B2 (en) * 2001-04-10 2004-06-15 Gazillion Bits, Inc. Wavelength division multiplexing with narrow band reflective filters
CN204536604U (zh) * 2015-03-24 2015-08-05 深圳市易飞扬通信技术有限公司 光学耦合器件及光模块
CN106646779A (zh) * 2017-01-03 2017-05-10 青岛海信宽带多媒体技术有限公司 一种光模块
CN108776373A (zh) * 2018-06-21 2018-11-09 青岛海信宽带多媒体技术有限公司 光模块
CN106950658B (zh) * 2017-04-26 2019-01-18 华为技术有限公司 光收发组件

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751373B2 (en) * 2001-04-10 2004-06-15 Gazillion Bits, Inc. Wavelength division multiplexing with narrow band reflective filters
CN204536604U (zh) * 2015-03-24 2015-08-05 深圳市易飞扬通信技术有限公司 光学耦合器件及光模块
CN106646779A (zh) * 2017-01-03 2017-05-10 青岛海信宽带多媒体技术有限公司 一种光模块
CN106950658B (zh) * 2017-04-26 2019-01-18 华为技术有限公司 光收发组件
CN108776373A (zh) * 2018-06-21 2018-11-09 青岛海信宽带多媒体技术有限公司 光模块

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12158610B2 (en) 2019-10-25 2024-12-03 Commscope Technologies Llc Integrated optical wavelength division multiplexing devices

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