WO2020181969A1 - 光模块 - Google Patents

光模块 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)
French (fr)
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 CN201920323416.5U external-priority patent/CN209707741U/zh
Priority claimed from CN201910187738.6A external-priority patent/CN111694107A/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/zh
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.

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Abstract

一种光模块，包括：电路板（1）、透镜组件（6）、激光芯片（8）、光接收芯片（7）以及滤光片（9）；激光芯片（8）以及光接收芯片（7）设置在电路板（1）表面；透镜组件（6）罩设在激光芯片（8）以及光接收芯片（7）上；透镜组件（6）包括光反射面（601）、支撑斜面（602）以及相对支撑斜面（602）两侧凹陷的凹陷面（606），滤光片（9）设置在支撑斜面（602）上，凹陷面（606）与滤光片（9）之间由胶水填充；如此，在固定滤光片（9）时，在凹陷面（606）与滤光片（9）之间填充胶水即可，避免了胶水任意流动以及滤光片（9）通光表面也粘上胶水的问题。

Description

光模块
本申请要求在2019年03月13日提交中国专利局、申请号为201910187738.6、发明名称为“一种光模块”，以及在2019年03月13日提交中国专利局、申请号为201910189746.4、发明名称为“一种光模块”，以及在2019年03月13日提交中国专利局、申请号为201920323416.5、实用新型名称为“一种光模块”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光通信技术领域，尤其涉及一种光模块。
背景技术
在光模块中的透镜组件是一体注塑成型的，安装时，将光发射芯片(激光芯片)和光接收芯片安装在印刷电路板上，再将透镜组件罩设在该印刷电路板上，即可简单实现透镜组件与激光芯片、光接收芯片等电器件的耦合，操作方便并能够降低成本。还有，光模块的滤光片是贴装在透镜组件内部的光传输路径上。
发明内容
本申请提供一种光模块，在透镜组件上设置滤光片，以形成光传输路径。
本申请提供一种光模块，包括：
电路板，其表面设置有激光芯片及光接收芯片；
透镜组件，罩设在激光芯片以及光接收芯片上，包括光反射面、支撑斜面以及相对支撑斜面凹陷的凹陷面；
滤光片，设置在支撑斜面上，凹陷面与滤光片之间由胶水填充；
其中，光反射面可将来自激光芯片的光反射；滤光片可将光反射面反射的光透射；滤光片可将来自光模块外部的光反射向光接收芯片。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本说明书根据一示例性实施例示出的一种光模块封装好后的整体结构示意图。
图2是本说明书根据一示例性实施例示出的光模块的整体拆分示意图。
图3是本说明书根据一示例性实施例示出的光模块的局部拆分示意图。
图4为本说明书根据一示例性实施例示出的光模块中透镜组件的局部透视图。
图5为本说明书根据一示例性实施例示出的所述透镜组件6的侧俯视图。
图6为本说明书根据一示例性实施例示出的所述滤光片固定在所述透镜组件内时的侧俯视图。
图7为本说明书根据一示例性实施例示出的所述透镜组件的剖视图。
图8为本说明书实施例中所述透镜组件中另一种局部结构的放大示意图。
图9为本申请中光纤端部固定座及光纤外接插头连接后结构示意图。
图10为本申请中光纤端部固定座及光纤外接插头的分解结构示意图。
图11为本申请中光纤端部固定座通过光纤与光纤外接插头连接后的结构示意图。
图12为图10中光纤端部固定座及光纤外接插头的另一角度视图。
图13为本申请光纤端部固定座一实施例的透视图。
图14为图13中A处的放大图。
图15为本申请光纤端部固定座与激光切割器的位置关系示意图。
图16为图13中光纤端部固定座的表面结构示意图。
图17为图16中光纤端部固定座的另一角度视图。
图18为本申请光纤端部固定座另一实施例的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。
图1是所述光模块封装好后的整体结构示意图。由图1所示，所述光模块内部包括有电路板1，所述电路板用于实现电信号向光束的转换或外部光束向电信号的转换。所述光模块一侧有连接器2，用于连接外部的光纤。所述光模块从外部看由下壳体3与上壳体4相互扣合封装成一体。所述光模块将内部电路板1 工作触发产生的光束发送给外部的光纤和/或接收外部的光纤内的光束，并通过电路板将该光束转换成电信号。
图2是本说明书根据一示例性实施例示出的光模块的整体拆分示意图。由图2所示，所述光模块包括有电路板1，光接收芯片7以及激光芯片8，其中，所述激光芯片8以及所述光接收芯片7沿着光纤方向一字排列设置在所述电路板表面，所述光接收芯片7用于接收外部光纤传送过来的光束并将其转换为电信号，所述激光芯片8用于将电信号转换成光束传送给外部光纤；所述光模块还包括透镜组件6，所述透镜组件6罩设在所述激光芯片8以及所述光接收芯片7上，用于改变光束的传播方向；所述光模块还包括所述滤光片9，所述滤光片9固定在所述透镜组件6内，用于与所述透镜组件6配合，将所述激光芯片8发射出去的光束与外部接收到的光束分开。所述光模块还包括光纤带13，所述光纤带13一端连接至透镜组件6，另一端连接至所述连接器2。所述连接器2包括有固定所述光纤带的光纤外接插头。
图3是本说明书根据一示例性实施例示出的光模块的局部拆分示意图。由图3所示，所述电路板1上还包括有位于所述光接收芯片7一侧的第一驱动芯片71，所述第一驱动芯片71用于驱动所述光接收芯片7将由外部接收到的光束转换成电信号；所述电路板1上还包括有位于所述激光芯片8一侧的第二驱动芯片81，所述第二驱动芯片81用于驱动所述激光芯片8将内部电信号转换成发送给外部的光束。所述光接收芯片7与所述激光芯片8沿光纤方向一字排列，所述透镜组件罩设在所述激光芯片以及所述光接收芯片上。工作时，所述激光芯片8发射的光束垂直入射至所述透镜组件6，所述光接收芯片7垂直接收到由所述透镜组件6发出的光束，由于透镜组件内，所述激光芯片8向外部光纤发 射的光束和/或外部光纤向所述光接收芯片发射的光束在透镜组件内的光路都是沿着光纤的方向，而所述光接收芯片7与所述激光芯片8沿光纤方向一字排列，可知所述激光芯片8向外部光纤发射的光束在透镜组件6内的光路与外部光纤向所述光接收芯片7发射的光束在在透镜组件6内的光路存在重合，都是沿着光纤方向。
基于上述得到的：激光芯片8向外部光纤发射的光束在透镜组件6内的光路与外部光纤向所述光接收芯片7发射的光束在在透镜组件6内的光路存在重合，为了保证将所述激光芯片8发射的光束与所述光接收芯片7接收的光束分离，将一滤光片9固定在所述透镜组件内。所述外部光纤向所述光接收芯片7发射的光束由滤光片的反射面反射后，垂直射向所述光接收芯片7，所述激光芯片8发射的光束在透镜组件内由滤光片的另一面射入，透过滤光片射出至外部光纤。
其中，所述电路板1上沿光纤方向一字排列的光接收芯片7以及激光芯片8为一组，在所述电路板1上可并排设置有多组沿光纤方向一字排列的光接收芯片7以及激光芯片8。
其中，所述透镜组件6连接有光纤带13，所述激光芯片8发射的光束经过透镜组件发送至光纤带13，所述光纤带13将待发送的光束经过透镜组件发送至光接收芯片7。
接下来，再对所述透镜组件的具体结构以及滤光片的固定作详细的描述。图4为本说明书根据一示例性实施例示出的光模块中透镜组件的局部透视图。如图4所示，所述透镜组件6包括有光反射面601、支撑斜面602，所述光反射面601布置在所述激光芯片的上方，将激光芯片发射的光束的传播方向由垂直 于光纤的方向转换为与光纤方向一致的方向。所述支撑斜面602布置在所述光接收芯片的上方，外部光纤内的光束通过支撑斜面上滤光片的反射面反射垂直射入所述光接收芯片。
图4中，所述透镜组件还包括位于所述支撑斜面中间的凹陷腔604,以及位于所述支撑斜面与所述光反射面601之间的空腔605(由于图4为透视图，所述凹陷腔以及空腔的具体设置可参见图5)。其中，所述支撑斜面相对于所述光反射面靠近外部的光纤，也就是说，所述凹陷腔604相对于空腔605靠近外部的光纤。由于透镜组件中的光反射面601布置在所述激光芯片8的正上方，所述激光芯片8受驱动工作，发射出垂直与光纤方向的光束，所述光束垂直射到所述光反射面601的表面，发生反射，反射后的光束的传播方向转换为与光纤方向一致，发生反射后的光束先射向空腔605，然后再射向位于所述支撑斜面上的滤光片，透过所述滤光片后，所述光束射入所述凹陷腔中，最终，入射至外部的光纤中。其中，所述凹陷腔604用于提供空气与滤光片之间的交界面，以满足光反射的折射率要求。
当外部的光纤中有传送给所述光接收芯片7的光束时，所述光纤将所述光束发射至所述凹陷腔中，由于透镜组件中的支撑斜面602布置在所述光接收芯片的正上方，且滤光片与所述支撑斜面602接触的面为滤光片的反射面，即所述滤光片的反射面位于所述光接收芯片7的正上方，光纤向所述凹陷腔604中发射的光束射向所述滤光片的反射面，经过反射，使得所述光束的方向由与光纤方向一致转换为垂直与所述光接收芯片7，最后，经过反射后的光束垂直的射向所述光接收芯片7，所述光接收芯片7受驱动工作，将接收到的光束转换成电信号。
所述滤光片设置在所述支撑斜面上，所述光反射面601与所述支撑斜面602平行，也即是所述光反射面601与滤光片一表面平行。为了防止滤光片由于重力作用沿着所述支撑斜面602下滑，在透镜组件内还设置了支撑底面603，所述支撑斜面602与所述支撑底面603相交形成卡槽，所述滤光片装设在所述卡槽内。在一个较佳的实施例中，所述支撑斜面602的倾斜角为顺时针倾斜45度角。
在一个实施例中，所述支撑斜面602与所述支撑底面603相交形成的夹角为90度。由于滤光片固定时，是卡合在所述支撑斜面与所述支撑底面相交形成的卡槽内，故支撑斜面与所述支撑底面相交形成的夹角与滤光片的结构相匹配。一般情况下，所述滤光片为长方体或正方体的方形结构，故滤光片倾斜放置在卡槽内时，所述卡槽的夹角为90度。当然，所述撑靠面与所述支撑面相交形成的夹角也可以根据滤光片的实际结构来进行设定。
图5为本说明书实施例中所述透镜组件6的侧俯视图。由图5可知，所述滤光片9可以放置在支撑斜面602上，卡合在所述支撑斜面602与所述支撑底面603形成的卡槽中；在所述滤光片固定在所述支撑斜面602上后，所述支撑斜面602一侧与所述光反射面601之间存在有空腔605，当激光芯片发出的光束经过光反射面601反射后，沿着光纤的方向入射至空腔605，然后再入射至滤光片的一侧表面；所述支撑斜面602另一侧存在凹陷腔604，所述激光芯片的入射光束透过所述滤光片9后，经过凹陷腔604发射至外部的光纤，或者，外部光纤发送来的光束穿过所述凹陷腔604，射向所述滤光片的反射面，经过滤光片的反射面反射，发射至所述光接收芯片。所述凹陷腔604的作用是形成空气与滤光片之间的交界面，满足光反射的折射率要求。
将所述滤光片9固定在所述支撑斜面602上后，为了保证滤光片不发生横 向的平移，需要用粘合胶将所述滤光片粘合在所述支撑斜面上，但在所述支撑斜面上涂胶时，由于支撑斜面倾斜，故其表面上的粘合胶由于重力向下流动，造成各处点胶不均，将所述滤光片压在所述支撑斜面上时，其表面多余的粘合胶会向两侧挤压出来，容易造成其他光学器件或滤光片表面也粘上胶水，同时，由于粘合胶向下流动，使得支撑斜面底部粘合胶多、顶部粘合胶少，造成固定在支撑斜面上的滤光片的倾斜角度发送变化，进而影响光路。
在一个实施例中，为解决上述问题，如图5所示，所述透镜组件6还包括相对所述支撑斜面凹陷的凹陷面606，所述凹陷面与所述滤光片之间由胶水填充。如图5或6所示，所述支撑斜面的两侧表面逐渐凹陷，分别形成低于所述支撑斜面的凹陷面606；也就是说，所述支撑斜面相对于所述凹陷面来说，为向上凸出的一倾斜面，所述支撑斜面可与所述凹陷面平行。
如图6所示，固定滤光片9时，先将滤光片放置在所述支撑斜面与所述支撑底面相交形成的卡槽中，然后在所述凹陷面606与所述滤光片9之间填充粘合胶，待粘合胶凝固后，即实现了通过粘合胶固定了所述滤光片，凹陷面606用于容纳固定滤光片的粘合胶。滤光片设置在支撑斜面上，滤光片的面积大于支撑斜面的面积范围，滤光片有部分面积区域超出支撑斜面的范围；具体地，在支撑斜面的边缘下陷形成凹陷面，该滤光片超出支撑斜面的部分位于凹陷面上方，该滤光片超出支撑斜面的部分与凹陷面之间形成空隙，在此空隙中点胶，如此，胶水通过凹陷面粘接滤光片，凹陷面与支撑斜面是不同的面，即避免了在所述支撑斜面上点胶，在所述凹陷面上点胶，使得粘合胶在凹陷面606与所述滤光片9之间完全填充，即可实现对所述滤光片的固定，故滤光片9压在支 撑斜面上时，不会存在因胶水向两侧挤压造成对滤光片的通光表面的影响，也不会存在因为胶水不均造成滤光片的倾斜角度发生变化。
在一个实施例中，图7为本说明书实施例中所述透镜组件的剖视图，如图7可清楚的看到，所述透镜组件6内具有一倾斜的光反射面601、以及支撑斜面602；其中，所述支撑斜面与所述光反射面平行，所述支撑斜面的倾斜角为顺时针倾斜45度角。在所述支撑斜面602以及所述光反射面601之间存在一个空腔605，经过光反射面反射的光束通过空腔605射至所述支撑斜面602上滤光片的表面。所述支撑斜面的一侧具有凹陷腔604，其具体作用前面已经详述，此处不再赘述。基于图7，下面再详细的描述下在激光芯片发射光束与光接收芯片接收光束时，透镜组件内具体光路分别为：
在激光芯片发射光束时，所述激光芯片发射的光束经过光反射面601反射、经过空腔605、透过滤光片9，再经过凹陷腔604进入外部光纤。
在光接收芯片接收光束时，所述外部光纤发射的光束经过凹陷腔604，由滤光片9的反射面反射后，垂直射入所述光接收芯片。
在本实施例中，如图7所示，所述透镜组件内的支撑斜面602与所述凹陷面606交界，在所述凹陷面与所述滤光片之间由胶水填充。为了方便向所述凹陷面与所述滤光片之间填充胶水，所述透镜组件6还包括与所述凹陷面606邻近的点胶槽607，所述点胶槽607用于容纳点胶针头。实际应用中，采用点胶用的注射器向所述凹陷面与所述滤光片之间注射粘合胶水，而该注射器采用的点胶针头一般较小，容易丢失，现设计该点胶槽607，来收纳对应的点胶针头，并将其封装在透镜组件内部，防止点胶针头的丢失，在进行滤光片9的固定时， 直接从所述点胶槽内取出点胶针头来使用，具有较好的使用便利性。
如图7所示，为了防止滤光片9落尘或者高低温时滤光片上凝霜露从而影响滤光片9的光学性能，在透镜组件6的上方还设置有一个浅槽608，所述浅槽608内可以放置一个盖板，通过盖板将透镜组件中的滤光片等光路元件遮盖住。
在一个实施例中，为保证滤光片处于一密封的空间内，可以在浅槽608的四周涂上粘合胶，然后将盖板盖设在所述浅槽608内，并通过粘合胶与所述浅槽粘接。其中，为了控制浅槽608内的胶水不会任意流动污染内部的滤光片等光路元件，在浅槽608内的四周分别设置了凹陷的胶槽609，用于容纳粘合盖板的粘合胶。
图8为本说明书实施例中所述透镜组件中另一种局部结构的放大示意图。在一个实施例中，如图8所示，图8中的光反射面601、支撑底面603、凹陷腔604，点胶槽607、浅槽608以及位于浅槽四周凹陷的胶槽609的结构以及功能在前面都已详细记述，此处不再赘述。在本实施例的透镜组件中，所述支撑斜面602与所述凹陷面606之间设置有多个内部通孔，所述点胶针头将粘合胶通过所述内部通孔由所述凹陷面606注入至所述支撑斜面表面。也就是说，所述支撑斜面602上设置有多个第一孔611，而所述凹陷面606上设置有多个第二孔610，而所述第一孔611与第二孔610一一对应，且是内部贯通。在固定滤光片9时，首先将滤光片放在所述卡槽内，然后，点胶针头对准所述凹陷面606上的第二孔分别注射粘合胶，粘合胶通过内部通道由第二孔流至第一孔的表面，而第一孔的表面与所述支撑斜面平齐，将滤光片放置在所述支撑斜面上时，滤光片表面将会与所述第一孔表面的粘合胶接触进而粘合；同时，待第一孔与第二 孔之间的粘合胶凝结固定后，再向所述凹陷面与所述滤光片之间进一步填充胶水，保证了滤光片与粘合胶的进一步粘接，通过上述方式，使得滤光片的固定更加牢靠，且不影响滤光片的倾斜角度，以及避免了在支撑斜面上直接涂胶可能造成的胶水流出污染滤光片等光学元件。
在一个实施例中，所述透镜组件具有注塑而成的一体式结构。其中，透镜组件采用的材料是聚醚酰亚胺，由于聚醚酰亚胺(Polyetherimide，简称PEI)是无定形聚醚酰亚胺所制造的超级工程塑料，具有最佳之耐高温及尺寸稳定性，以及抗化学性、阻燃、电气性、高强度、高刚性等等，采用该种材料注塑而成的透镜组件也具有较高的耐高温以及稳定性。
在一个实施例中，在透镜组件中还设置有排气孔。由于透镜组件中光路元件以及对应的光路径设计需要，透镜组件中存在多个中空的空腔，用于为光线提供传输路径。将透镜组件固定在印刷电路板上时，由于透镜组件内设置为密闭空间，若空腔内的空气容易膨胀，导致空间内气压增大，将会使得滤光片等光路元件的固定位置发生变化，从而导致光传输路径改变，影响光电信号转换的准确性。故透镜组件上设置有排气孔，用于将空腔内的空气排出，将空气排出后，再将所述排气孔封堵，完成透镜组件的密封。
上述实施例，描述了光模块中滤光片与用于固定所述滤光片的支撑斜面的结构限定关系，而对所述光模块中滤光片的数目并未做限定，所述光模块中可以有多个倾斜放置的滤光片以及对应的支撑斜面，多个滤光片的位置关系可以是相互并列，也可以是其他的排列顺序，其排列顺序也不做限定，可以根据实际需要设定。
图9为本申请中光纤端部固定座及光纤外接插头连接后结构示意图。如图9所示，光纤端部固定座11与透镜组件6连接，光纤带13的一端插入到光纤端部固定座11内并被光纤端部固定座11固定，以使光纤带13的一端与透镜组件6之间能够稳定的进行光信号的传输，光纤带13的另一端插入到光纤外接插头14内并被光纤外接插头14固定。
光纤外接插头14插入连接器2中，组合形成与外部光纤连接的通用型接口。
图10为本申请中光纤端部固定座及光纤外接插头的分解结构示意图；图11为本申请中光纤端部固定座通过光纤与光纤外接插头连接后的结构示意图。如图10及图11所示，光纤端部固定座11面向透镜组件6的端面111开设有光纤孔1113，该光纤孔1113内穿设有光纤带13，该光纤带13伸出光纤端部固定座11的端面111。
图12为图10中光纤端部固定座及光纤外接插头的另一角度视图。如图11及图12所示，透镜组件6与光纤端部固定座11对接的端面还开设有透光孔123。
其中，可以在光纤端部固定座11的端面111上开设两个定位孔1114，在透镜组件6对应两个安装孔114的位置设置定位柱122，通过将两个定位柱122插入到对应的定位孔1114内，以将光纤带13与透镜组件6定位连接。
在光纤端部固定座11的侧面还可以开设定位槽1122，透镜组件设置有托板612(如图5所示)，该定位槽1122用于与透镜组件上的托板612相配合，以将光纤端部固定座11固定在透镜组件上6(如图3所示)。当然，光纤端部固定座11和透镜组件6、PCB板15之间也可以通过粘贴、螺钉固定方式连接，以进一步提高对光纤端部固定座11的定位效果。
在光纤端部固定座11的顶面112还开设有与光纤孔1113连通的点胶孔1112， 当光纤带13穿过光纤端部固定座11内的通孔伸出于光纤端部固定座11的端面111后，对点胶孔1112进行注胶，当注入到点胶孔1112内的胶凝固后即可将光纤带13与光纤端部固定座11固定连接。
图13为本申请光纤端部固定座一实施例的透视图；图14为图13中A处的放大图。如图13及图14所示，如图13及图14所示，光纤孔1113可以包括沿远离端面111的方向依次连通的第一孔段11131、过度段11132和第二孔段1115c，第一孔段11131的直径小于第二孔段11133的直径，且第一孔段11131的直径与光纤带13裸露部分的直径基本相同，以容纳光纤带13的裸露部分并对光纤带13的端部具有较好的限位效果；第二孔段11133的直径大于或等于光纤带13包裹有保护层的部分的直径，用于容纳光纤带13包裹有保护层的部分；过度段11132的内径沿第一孔段11131至第二孔段11133的方向渐扩设置，由此，过度段11132的内表面能够起到导向的作用，使光纤带13的端部快速准确插入到第一孔段11131内。
其中，第二孔段11133与点胶孔1121存在交叉，以使光纤带13穿过第二孔段11133后，一部分光纤带13位于点胶孔1121内并被点胶孔1121内胶固定。在光纤端部固定座11背离端面111的一端还开设有供光纤带13插入的入口113，该入口113与多个第二孔段11133连通，进入到入口113内的多根光纤带13会插入到不同的光纤孔1113内并从端面111的不同位置伸出，以使光纤带13内的光信号通过光纤端部固定座11的端面111传输至透镜组件6的透光孔123内，或者，使激光芯片发射至透镜组件6内的光信号通过光纤端部固定座11的端面111进入到光纤带13内。
图15为本申请光纤端部固定座与激光切割器的位置关系示意图。为了提高 光纤带13与光纤端部固定座11的连接效率，通常会将光纤带13穿过光纤端部固定座11内的光纤孔1111，并使光纤带13的端部伸出于光纤端部固定座11的端面111，之后，如图15所示，可以通过激光切割器20对伸出于端面111的光纤带13进行切割，以对光纤带13的端面进行整形，使光纤带13内的光信号能够通过光纤端部固定座11的端面111传输至透镜组件6内，或者，使激光芯片发射至透镜组件6内的光信号通过光纤端部固定座11的端面111并进入到光纤带13内。而且，由于光纤带13的直径较细(一般只有125um)，通过激光切割器20对伸出于端面111的光纤带13进行切割，还能够缩短光纤带13伸出于端面111的长度，避免在使用光纤端部固定座11，或者，对光纤端部固定座11的端面111进行清洁的过程中，光纤带13在外力的作用下断裂而导致光线接头11或光纤组件报废。
但是，激光切割器20产生的激光21具有一定的发散角度，在使用激光切割器20对光纤带13伸出于光纤端部固定座11的端面111的部分进行切割时，激光切割器20产生的激光21可能会与光纤端部固定座11的端面111相干涉而导致光纤端部固定座11的端面111被烧伤并产生细屑，这些细屑扩散到空气中后容易对已经切割完毕的光纤带13的端面造成污染，使得需要另外再使用风枪及酒精棉对光纤带13的端面进行清理，由此光纤端部固定座11的清理时间加长，进而导致光模块10的生产效率降低。
为了解决上述问题，本申请提出一种光纤端部固定座。
图16为图13中光纤端部固定座的表面结构示意图；图17为图16中光纤端部固定座的另一角度视图。如图16及图17所示，光纤端部固定座11具有面向透镜组件6的端面111，在端面111上开设有光纤孔1113，该光纤孔1113用 于供光纤带13穿过，以使光纤带13伸出能够伸出光纤端部固定座11的端面111。
其中，可以在光纤端部固定座11的端面111的边缘形成凹陷部1111。
由图15可知，因激光光束成发散状态，当激光切割完光纤后，继续传播的激光具有更大的发散，与端面发生干涉时，端面的边缘是必然会被切割的部分，也是端面上被切割最严重的部分，在端面的边缘设置凹陷部可以避让激光；由此，当激光切割器20产生的激光21对光纤带13进行切割时，可以使激光切割器20产生的激光21与凹陷部1111相对，由于凹陷部1111自光纤端部固定座11的端面111向内凹陷部，因此，凹陷部1111的底面与激光21之间保持一定的间距，不会被激光21烧伤，故而也不会产生细屑而污染光纤带13的端面，使光纤带13端部的清理更加方便，从而减少光纤带13的端面的清理时间，提高光模块10的生产效率。
在本申请的某些实施例中，光纤孔为多个，光纤孔横向排列在端面上，多个光纤孔连在一起的横向尺寸小于等于凹陷部面的横向尺寸；由于光纤从光纤孔中伸入，以供激光切割，所以光纤端部固定座的端面在激光通过路径上设置凹陷部，若每一根光纤均被切割，则激光切割每一根光纤后的光路均需要设置凹陷部；集合起来，凹陷部的横向尺寸要大于等于多个光纤孔连接在一起的尺寸，才能保证切割每一根光纤时均不会切割到端面。
在本申请的某些实施例中，凹陷部1111的横向尺寸可以小于光纤端部固定座11的端面111的横向尺寸，或者，凹陷部1111的横向尺寸与光纤端部固定座11的端面111的横向尺寸相等，也即凹陷部1111的横向两端直接延伸至光纤端部固定座11的相对两侧边。
其中，可以使凹陷部1111自光纤端部固定座11的端面111的边缘朝向光 纤孔1113延伸，以尽可能的增大凹陷部1111的面积，使光纤端部固定座11的端面被激光21烧伤的可能性更低，从而进一步提高光模块10的生产效率。
其中，凹陷部1111可以为矩形、梯形等等，具体可根据光纤端部固定座11的结构以及光纤孔1113的排列方式而定。例如图16及图17所示，光纤端部固定座11内的光纤孔1113数量为多个，且多个光纤孔1113呈“一”字型排列设置，凹陷部1111呈矩形，且凹陷部1111靠近多个光纤孔1113的一侧沿多个光纤孔1113的排列方向延伸。
在一实施例中，可以使凹陷部1111自端面111凹陷部的深度大于或等于0.02mm，以保证激光切割器20在对光纤带13进行切割时，凹陷部1111的底面与激光21之间具有足够的间隙，使光纤端部固定座11的端面111不会被烧伤。
另外，还可以使凹陷部1111自端面111凹陷部的深度小于或等于2mm，以避免凹陷部1111的深度过深而影响光纤端部固定座11的强度，或者，对光纤端部固定座11上的其它结构造成影响。
其中，凹陷部1111的具体深度可以为0.1mm、0.5mm、1mm等等，具体可根据光纤端部固定座的结构而定，此处不作限制。
需要说明的是，凹陷部1111的底面可以为平面、斜面、曲面或凹凸不平的表面等等，当凹陷部1111的底面为斜面、曲面或凹凸不平的表面，可以使凹陷部1111与激光21相对部分最小的深度大于或等于0.02mm，以保证凹陷部1111底部槽深最小的部位不会被激光21烧伤。
在一实施例中，如图16及图17所示，光纤端部固定座11的端面111上具有形成面1112，在光纤端部固定座11的端面111上开设的光纤孔1113位于该 形成面1112上，光纤带13穿过光纤孔1113后伸出形成面1112。
形成面与凹陷部相对，该相对形态由一种制作过程进一步阐述；在形成凹陷部的过程中，光纤端部固定座的端面整体为平整的表面，在端面的边缘设置凹陷部，凹陷部相对平整的表面而凹陷部，在凹陷部区域之外未凹陷部的表面为形成面。凹陷部1111的数量可以为两个，且两个凹陷部1111分布在形成面1112的相对两侧。由此，激光切割器20沿两个凹陷部1111的排列方向发射激光21以对光纤带13进行切割时，端面111位于形成面1111两侧的部分均不会被烧伤。当然，根据激光切割器20在切割光纤带13过程中对光纤端部固定座11的端面111的烧伤情况，可以只在端面111上形成一个凹陷部，并让该凹陷部位于形成面沿激光21发射方向的一侧。例如：当光纤端部固定座11的端面111主要是形成面的上侧被烧伤时，可以只在形成面的上侧设置凹陷部；当光纤端部固定座11的端面111主要是形成面的下侧被烧伤时，可以只在形成面的下侧设置凹陷部。
在本申请的某些实施例中，可以使形成面1112在两个凹陷部1111的排列方向上的宽度大于或等于0.25mm，以使光纤端部固定座11在光纤孔1113处具有较高的强度，当光纤带13穿过通孔后，对光纤带13有较好的限位效果，避免出现光纤端部固定座11受到外力的作用后产生较大的变形，导致光纤带13产生较大的位移，从而影响信号的传输。
另外，还可以使形成面1112在两个凹陷部1111的排列方向上的宽度小于或等于1.5mm，以防止形成面1112的宽度过宽而出现激光21烧伤形成面1112的问题。
其中，形成面1112在两个凹陷部1111的排列方向上的宽度具体可以为 0.4mm、0.5mm、1mm等等，具体可根据光纤端部固定座11的结构而定。
在本申请的某些实施例中，形成面1112可以呈矩形设置，多个光纤孔1113沿形成面1112的长度方向依次排列，且光纤孔1113位于形成面1112沿宽度方向的中部，以使形成面1112宽度尽可能小的同时，对光纤带13具有较好的限位效果。
本申请中，当凹陷部1111的数量为两个时，两个凹陷部1111可以在形成面1112的两侧对称设置，也可以非对称设置，具体可根据光纤端部固定座11的结构而定。
例如图17所示，光纤端部固定座11的顶面112上开设有点胶孔1121，该点胶孔1121会导致光纤端部固定座11上部的强度降低，为了提高光纤端部固定座11上部的强度，可以增加光纤端部固定座11上部的厚度。此时，上方的凹陷部1111的宽度会大于下方凹陷部1111的宽度。当然也可以同时增大光纤端部固定座11上部和下部的厚度，以提高光纤端部固定座11的整体强度。
在一实施例中，可以使形成面1112位于两个定位孔1114之间，并使凹陷部1111分布在两个定位孔1114连线的一侧，以避免凹陷部1111与定位孔1114相干涉，使光纤端部固定座11的结构更加合理。
其中，当凹陷部1111的数量为两个时，两个凹陷部1111可以分布在两个定位孔1114连线的两侧。
当然，两个凹陷部1111也可以分布在形成面1112沿两个定位孔1114的连线方向的两侧，此时，定位孔1114可以直接开设于凹陷部1111上。
在一实施例中，当形成面1112上开设有多个光纤孔1113时，可以使多个光纤孔1113排列在两个定位孔1114的连线方向上，并使凹陷部1111沿多个光 纤孔1113的排列方向延伸。
在另一些实施例中，如图18所示，光纤端部固定座11a的端面111a上具有形成面1112a，光纤端部固定座11a在端面111a上形成的光纤孔1113a位于该形成面1112a上。可以使凹陷部1111a的底面与形成面1112a邻接并呈夹角设置，以使凹陷部1111a的加工更加方便。而且，由于凹陷部1111a与形成面1112a邻接，无清洁死角，因此，光纤端部固定座11a的端面111a清理更加方便。
其中，形成面1112a的结构，以及形成面1112a上的光纤孔1113a的数量、结构和分布关系与上述形成面1112的结构，以及形成面1112上的光纤孔1113的数量、结构和分布关系基本相同。
另外，凹陷部1111a的数量可以为一个或两个，凹陷部1111a和形成面1112a的位置关系可以参照上述凹陷部1111和形成面1112的位置关系，此次不再赘述。
在本申请的某些实施例中，可以使凹陷部1111a的底面与形成面1112a形成的角度小于或等于178°，以保证激光切割器20在对光纤带13进行切割时，凹陷部1111a的底面与激光21之间具有足够的间隙，使光纤端部固定座11a的端面111a不会被烧伤。
另外，还可以使凹陷部1111a的底面与形成面1112a形成的角度大于或等于110°，以避免凹陷部111a的底面倾斜角度过大而导致光纤端部固定座11的强度降低，或者，对光纤端部固定座11上的其它结构造成影响。
如图18所示，光纤端部固定座11a也可以包括定位孔1114a和点胶孔1121a，该定位孔1114a和点胶孔1121a的形状、尺寸和位置等与光纤端部固定座11上 的定位孔1114和点胶孔1121的形状、尺寸和位置基本相同，此处不再赘述。
需要说明的是，光纤外接插头14与光纤带13连接的方式与光纤端部固定座11与光纤带13的连接方式基本相同，因此，也可以在光纤外接插头14的端面设置凹陷部，以在激光切割器切割伸出于光纤外接插头14端面的光纤带13进行切割时，对激光进行避让，防止光纤外接插头14的端面被激光烧伤。
上述对本说明书特定实施例进行了描述。其它实施例在所附权利要求书的范围内。本领域技术人员在考虑说明书及实践这里申请的发明后，将容易想到本说明书的其它实施方案。本说明书旨在涵盖本说明书的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本说明书的一般性原理并包括本说明书未申请的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本说明书的真正范围和精神由下面的权利要求指出。
应当理解的是，本说明书并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本说明书的范围仅由所附的权利要求来限制。
以上所述仅为本说明书的较佳实施例而已，并不用以限制本说明书，凡在本说明书的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本说明书保护的范围之内。

Claims (10)

  1. 一种光模块，其特征在于，包括：
    电路板，其表面设置有激光芯片及光接收芯片；
    透镜组件，罩设在所述激光芯片以及所述光接收芯片上，具有反射面、支撑斜面以及相对所述支撑斜面凹陷的凹陷面；
    滤光片，设置在所述支撑斜面上，所述凹陷面与所述滤光片之间由胶水填充；其中，所述光反射面可将来自所述激光芯片的光反射；所述滤光片可将所述光反射面反射的光透射；所述滤光片可将来自所述光模块外部的光反射向所述光接收芯片。
  2. 根据权利要求1所述的一种光模块，其特征在于，所述支撑斜面中间具有凹陷腔，所述激光芯片发出的光束透过所述滤光片后，射入所述凹陷腔中。
  3. 根据权利要求1所述的一种光模块，其特征在于，所述透镜组件还包括支撑底面，所述支撑斜面与所述支撑底面相交形成卡槽，所述滤光片装设在所述卡槽内。
  4. 根据权利要求1所述的一种光模块，其特征在于，所述透镜组件还包括点胶槽，所述点胶槽用于向所述凹陷面点胶。
  5. 根据权利要求1所述的一种光模块，其特征在于，还包括密封盖板，所述透镜组件表面具有凹槽，所述光反射面、所述支撑斜面、所述凹陷面以及所述滤光片设置在所述凹槽中，所述密封盖板密封所述凹槽。
  6. 根据权利要求1所述的一种光模块，其特征在于，还包括
    光纤端部固定座，其与所述透镜组件连接，其面向所述透镜组件的端面开设有光纤孔，所述光纤孔内穿设有光纤，所述光纤伸出所述端面；
    所述反射面可在所述光纤与所述激光芯片之间建立光反射连接，所述光纤端部固定座上围绕所述光纤孔的位置形成有凹陷部，所述凹陷部的深度大于或等于0.02mm，且小于或等于2mm。
  7. 如权利要求6所述的光模块，其特征在于，所述凹陷部自所述端面的边缘朝向所述光纤孔延伸，所述端面上具有形成面，所述光纤孔位于所述形成面上，所述凹陷部的底面与所述形成面邻接并呈夹角设置，所述凹陷部的底面与所述形成面形成的角度小于或等于178°，且大于或等于110°。
  8. 如权利要求6所述的光模块，其特征在于，所述光纤孔横向排列在所述端面上，所述光纤孔的横向尺寸小于等于所述凹陷部的横向尺寸，所述光纤孔的数量为多个，多个所述光纤孔排列在两个所述定位孔的连线方向上，所述凹陷部沿多个所述光纤孔的排列方向延伸。
  9. 如权利要求7所述的光模块，其特征在于，所述形成面在两个所述凹陷部的排列方向上的宽度大于或等于0.25mm，且小于或等于1.5mm。
  10. 如权利要求7所述的光模块，其特征在于，所述端面上开设有两个定位孔，所述形成面位于两个所述定位孔之间，两个所述凹陷部分布在两个所述定位孔连线的两侧。
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