JP2018044989A - Optical module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical module in which an elastic force pressing an optical fiber holding member on a light transmissive member while fixing a light transmissive member to a substrate by bonding does not act on a bonding portion between the light transmissive member and the substrate as a shear force.SOLUTION: A photoelectric conversion connector 1 comprises: a substrate 3; a light emitting element 41 and a light receiving element 42 mounted on the substrate 3; a lens block 5 fixed to the substrate 3 by bonding and used as the optical path of an optical signal converted into an electrical signal by the light emitting element 41 and the light receiving element 42; an MT ferrule 6 elastically pressed against the lens block 5 and holding the end portion of an optical fiber 11 transmitting the optical signal; and an MT clip 7 for supporting the MT ferrule 6 on the lens block 5. The MT clip 7 includes a receiving part 70 for receiving a pressing reaction force pressing the MT ferrule 6 and a locking part 72 locked in the lens block 5.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an optical module that converts an optical signal into an electric signal and outputs the electric signal, or converts an electric signal into an optical signal and outputs the optical signal.

  2. Description of the Related Art Conventionally, an optical module that includes a photoelectric conversion element that is provided at an end of an optical fiber and converts an optical signal and an electrical signal using the optical fiber as a transmission medium is known. In such an optical module, there is an optical module in which an optical fiber holding member that holds an optical fiber is elastically pressed against a lens block that optically couples the optical fiber and the photoelectric conversion element (see, for example, Patent Document 1). .

  The optical module described in Patent Document 1 is mounted with an optical fiber holding member (optical connector), a photoelectric conversion element (optical element), and a photoelectric conversion element provided at the tip of an optical fiber cable having a plurality of optical fibers. , A translucent member (lens block) for optically coupling the optical fiber and the photoelectric conversion element, a lens frame for holding the translucent member on the substrate, and an optical fiber holding member as the translucent member And an U-shaped optical connector frame that receives a reaction force of the pressing force by the elastic member.

  The lens frame has a plurality of legs that are fitted into lens frame fixing holes formed in the substrate, and is positioned and fixed to the substrate. The translucent member is bonded and fixed to the lens frame. The optical connector frame includes two side ribs that sandwich the optical fiber holding member, and a rear rib that connects one end portions of the side ribs, and an engagement hole formed in the substrate at the tip of each side rib. A protrusion is provided that engages with. The elastic member is disposed between the rear rib of the optical connector frame and the optical fiber holding member.

JP 2011-141443 A

  By the way, downsizing of optical modules is also required due to recent downsizing and high density of information processing apparatuses. As a measure for downsizing the optical module configured as described above, it is conceivable to eliminate the lens frame and directly bond the translucent member to the substrate. However, when the translucent member is bonded to the substrate, the pressing force by the elastic member acts as a shearing force on the bonded portion between the translucent member and the substrate, and the translucent member may peel from the substrate.

  Therefore, the present invention is a light in which the elastic force pressing the optical fiber holding member against the translucent member does not act as a shearing force on the bonded portion between the translucent member and the substrate while fixing the translucent member to the substrate by bonding. The purpose is to provide modules.

  In order to solve the above problems, the present invention provides a substrate, a photoelectric conversion element mounted on the substrate, an optical signal that is fixed to the substrate by adhesion, and is converted into an electric signal by the photoelectric conversion element. A translucent member serving as an optical path; an optical fiber holding member that is elastically pressed against the translucent member and that holds an end of the optical fiber through which the optical signal propagates; and A support member that supports the optical member, and the support member includes a receiving portion that receives a pressing reaction force that presses the optical fiber holding member, and a locking portion that is locked to the translucent member. Provide an optical module.

  According to the optical module of the present invention, the elastic force that presses the optical fiber holding member against the translucent member while the translucent member is fixed to the substrate by bonding is shearing force on the bonded portion between the translucent member and the substrate. It can be configured not to act as. For this reason, it is possible to reduce the cost by downsizing the optical module and reducing the number of components.

It is an external view which shows the external appearance of the photoelectric conversion connector which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the inside of a photoelectric conversion connector. (A) And (b) is sectional drawing which shows the AA line cross section and BB line cross section of FIG. (A) is a perspective view which shows an optical subassembly, (b) is a disassembled perspective view of an optical subassembly. (A) is the perspective view which looked at the optical subassembly from the direction different from Fig.4 (a), (b) is the disassembled perspective view of the optical subassembly seen from the same direction. It is a 6-face drawing of a lens block. (A) is a perspective view which shows the MT clip which concerns on 2nd Embodiment. (B) is a block diagram showing a state in which the MT ferrule is pressed against the lens block by the MT clip. (C) is explanatory drawing which shows the shape before and behind elastic deformation of MT clip.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the present embodiment, a case where the optical module of the present invention is embodied as a photoelectric conversion connector having a photoelectric conversion function will be described.

  FIG. 1 is an external view showing the external appearance of the photoelectric conversion connector according to the present embodiment. FIG. 2 is a perspective view showing the inside of the photoelectric conversion connector. 3A and 3B are cross-sectional views showing a cross section taken along line AA and BB in FIG.

  This photoelectric conversion connector 1 is provided at an end of an optical cable 10 in which a plurality of optical fibers 11 are accommodated in a sheath 12, and is used by fitting into a connector socket provided in a connection target device such as a server or a storage. Is done.

  The photoelectric conversion connector 1 is connected to a connector case 2 as a housing made up of a first case member 21 and a second case member 22, a ratchet 23 slidably held with respect to the connector case 2, and the ratchet 23. And a pulled pull tab 24. The first case member 21 and the second case member 22 are made of a metal such as a zinc alloy, for example. The connector case 2 is attached to and detached from the connector socket along the longitudinal direction.

  On both side surfaces of the connector case 2, recesses 20 are provided for engaging engagement pieces for preventing unintentional removal of the photoelectric conversion connector 1 from the connector socket. When pulling out the photoelectric conversion connector 1 from the connector socket, the pull tab 24 is pulled to slide the ratchet 23, and the concave portion 20 is engaged with the engagement piece by the curved portion 231 provided at the tip of the ratchet 23. To release.

  As shown in FIGS. 2 and 3, the photoelectric conversion connector 1 includes a substrate 3, a light emitting element 41 and a light receiving element 42 mounted on the substrate 3, a driver IC 43 electrically connected to the light emitting element 41, and a light receiving function. Amplifying IC 44 (see FIG. 2) electrically connected to element 42, lens block 5 as a translucent member fixed to substrate 3 by adhesion, and a plurality of lights derived from sheath 12 of optical cable 10 An MT (Multi Termination) ferrule 6 as an optical fiber holding member that holds the end of the fiber 11, an MT clip 7 as a support member that supports the MT ferrule 6 with respect to the lens block 5, and a coil spring as an elastic member 8.

  The substrate 3 is a printed circuit board in which an unillustrated wiring pattern made of copper foil is formed on a plate-like base material 30 made of a dielectric such as glass epoxy. The substrate 3 is accommodated in the connector case 2 and one end portion in the fitting direction with the connector socket is exposed from the connector case 2, and a plurality of electrodes 32 are provided in the exposed portion. When the photoelectric conversion connector 1 is fitted in the connector socket, the plurality of electrodes 32 come into contact with electrodes on the connector socket side (not shown).

  The light emitting element 41 is composed of, for example, a VCSEL (Vertical Cavity Surface Emitting LASER), converts an input electric signal into an optical signal, and outputs the optical signal. The light receiving element 42 is formed of a photodiode, for example, and converts an incident optical signal into an electric signal and outputs the electric signal. Each of the light emitting element 41 and the light receiving element 42 is an embodiment of the photoelectric conversion element of the present invention. The driver IC 43 drives the light emitting element 41 based on a signal input from the connection target device via the electrode 32. The amplification IC 44 amplifies the electric signal output from the light receiving element 42 and outputs the amplified signal from the electrode 32 to the connection target device. The light emitting element 41, the light receiving element 42, the driver IC 43, and the amplification IC 44 are mounted on one surface of the substrate 3. Hereinafter, this one surface is referred to as a mounting surface 3a.

  The lens block 5 is bonded to the mounting surface 3 a of the substrate 3 with an adhesive G (see FIG. 3B), and optically couples the plurality of optical fibers 11 to the light emitting element 41 and the light receiving element 42. In the present embodiment, eight optical fibers 11 are accommodated in the sheath 12 of the optical cable 10, of which four optical fibers 11 are optically coupled to the light emitting element 41, and the other four optical fibers 11 are connected. Optically coupled to the light receiving element 42. The lens block 5 serves as an optical path for an optical signal converted into an electric signal by the light emitting element 41 and an optical signal converted into an electric signal by the light receiving element 42. These optical signals propagate through the optical fiber 11. In FIG. 3A, the optical path L of the optical signal emitted from the light emitting element 41 in the lens block 5 is illustrated by a two-dot chain line.

  The MT ferrule 6 is elastically pressed against the lens block 5 by the restoring force of the coil spring 8. Thereby, relative positioning with the lens block 5 of the front end surface of the optical fiber 11 hold | maintained at MT ferrule 6 is made with high precision.

  Next, the configuration of the optical subassembly A including the lens block 5, the MT ferrule 6, the MT clip 7, and the coil spring 8 will be described in detail with reference to FIGS.

  4A is a perspective view showing the optical subassembly A, and FIG. 4B is an exploded perspective view of the optical subassembly A. FIG. 5A is a perspective view of the optical subassembly A viewed from a direction different from that in FIG. 4A, and FIG. 5B is an exploded perspective view of the optical subassembly A viewed from the same direction. . FIG. 6 is a hexahedral view of the lens block 5.

  Hereinafter, the direction parallel to the longitudinal direction of the connector case 2 will be described as the X direction, the direction perpendicular to the X direction and parallel to the substrate 3 as the Y direction, and the direction perpendicular to the substrate 3 as the Z direction.

  The lens block 5 is made of, for example, a translucent resin material, and includes a main body 50, a pair of legs 51 protruding from the main body 50 toward the substrate 3 in the Z direction, and the main body 50 along the X direction. And a pair of cylindrical shaft portions 52 projecting toward the MT ferrule 6 side.

  In the lens block 5, the distal end surfaces of the pair of leg portions 51 are bonded to the mounting surface 3 a of the substrate 3, and a space is formed between the main body portion 50 and the mounting surface 3 a of the substrate 3. The light emitting element 41, the light receiving element 42, the driver IC 43, and the amplification IC 44 are arranged between the main body 50 of the lens block 5 and the mounting surface 3 a of the substrate 3.

  A plurality of first lens portions 501 are formed on the surface of the main body 50 facing the MT ferrule 6, and a plurality of second lens portions 502 are formed on the surface facing the substrate 3. In the present embodiment, eight first lens portions 501 and eight second lens portions 502 are formed in the main body portion 50. The first lens unit 501 and the second lens unit 502 are convex lenses.

  The surface of the main body 50 facing the MT ferrule 6 includes a contact surface 50a with which the MT ferrule 6 contacts, and a bottom surface 500a of the recess 500 that is recessed from the contact surface 50a in the X direction. 501 is formed on the bottom surface 500 a of the recess 500.

  Of the eight second lens portions 502, the four second lens portions 502 face the light emitting element 41 in the Z direction, and the other four second lens portions 502 face the light receiving element 42 in the Z direction. Face each other.

  The main body 50 reflects light incident from the first lens unit 501 to the second lens unit 502, and reflects light incident from the second lens unit 502 to the first lens unit 501. A mirror portion 503 is formed. The inner surface of the mirror portion 503 is formed as a reflecting surface 503a that internally reflects light. The angles formed by the reflecting surface 503a with the X direction and the Z direction are 45 °, respectively.

  The main body 50 also includes a pair of recesses 504 that respectively lock a pair of locking portions 72 of the MT clip 7 described later, and a pair of arms 71 that respectively accommodate a part of the pair of arm portions 71 of the MT clip 7. A receiving groove 505 is formed. The pair of receiving grooves 505 are formed at corners between the surface of the main body 50 opposite to the substrate 3 and both side surfaces in the Y direction, and extend in the X direction. The recess 504 and the accommodation groove 505 communicate with each other.

  The MT ferrule 6 is made of resin and is formed by, for example, injection molding. The MT ferrule 6 has a rectangular first insertion hole 61 through which a bundle of a plurality of optical fibers 11 is inserted, and a plurality (12 in this embodiment) of second insertions through which each of the optical fibers 11 is inserted. A hole 62 is formed. One optical fiber 11 is inserted through each of the second insertion holes 62. As shown in FIG. 3A, the optical fiber 11 is arranged in the second insertion hole 62 so that the tip surface 11 a thereof coincides with the facing surface 6 a facing the lens block 5.

  The distal end surface 11a of the optical fiber 11 and the first lens unit 501 face each other in the X direction with an interval corresponding to the focal length of the first lens unit 501. In addition, the light emitting unit of the light emitting element 41 and the light receiving unit of the light receiving element 42 and the second lens unit 502 face each other in the Z direction with an interval corresponding to the focal length of the second lens unit 502. As a result, the light that has entered the first lens unit 501 from the distal end surface 11 a of the optical fiber 11 is reflected by the reflecting surface 503 a and collected by the second lens unit 502 on the light receiving unit of the light receiving element 42. Further, the light emitted from the light emitting portion of the light emitting element 41 is reflected by the reflecting surface 503 a and is condensed on the distal end surface 11 a of the optical fiber 11 by the first lens portion 501.

  The MT ferrule 6 is formed with a pair of fitting holes 60 into which the pair of shaft portions 52 of the lens block 5 are fitted. In the lens block 5 and the MT ferrule 6, the relative position in the Y direction and the Z direction is defined by fitting the shaft portion 52 into the fitting hole 60. The relative position of the lens block 5 and the MT ferrule 6 in the X direction is defined by the contact surface 6 a of the MT ferrule 6 contacting the contact surface 50 a of the lens block 5. With this configuration, the MT ferrule 6 is positioned with high accuracy with respect to the lens block 5, and the optical fiber 11 and the light emitting element 41, and the optical fiber 11 and the light receiving element 42 are optically coupled.

  The MT clip 7 is formed by bending a plate-like metal such as stainless steel, for example, and receives a pressing reaction force 70 that presses the MT ferrule 6 against the lens block 5 and a pair of arms that sandwich the MT ferrule 6 in the Y direction. 71 and a pair of locking portions 72 locked to the lens block 5 are integrally provided. The receiving portion 70 extends in the Y direction, and a rectangular insertion hole 700 through which the bundle of optical fibers 11 is inserted is formed at the center thereof.

  The pair of arm portions 71 extend from both ends of the receiving portion 70 in the X direction and extend in a direction parallel to the mounting surface 3 a without contacting the substrate 3. When the pair of arm portions 71 are housed in the pair of housing grooves 505 of the lens block 5, the pair of arm portions 71 are placed on the Y direction side surfaces 5a to Y of the lens block 5 as shown in FIG. It has a thickness that does not protrude in the direction.

  The pair of locking portions 72 are provided at the tips of the pair of arm portions 71. In the present embodiment, the locking portion 72 is formed of a folded piece formed so as to be folded at an acute angle from the tip of the arm portion 71.

  The coil spring 8 is disposed between the receiving portion 70 of the MT clip 7 and the MT ferrule 6 in a compressed state in the axial direction (X direction). The coil spring 8 abuts on the end face 6b of the MT ferrule 6 opposite to the face 6a facing the lens block 5, and generates elastic force that elastically presses the MT ferrule 6 against the lens block 5 by its restoring force. To do.

  A bundle of a plurality of optical fibers 11 is inserted through the central portion of the coil spring 8. That is, the plurality of optical fibers 11 are inserted through the insertion hole 700 of the receiving portion 70 of the MT clip 7, the coil spring 8, and the first insertion hole 61 of the MT ferrule 6, It is inserted into each of the insertion holes 62.

  As shown in FIGS. 3A and 3B, the substrate 3 has a plurality of vias 33 penetrating between the mounting surface 3 a and the back surface 3 b on the back side of the mounting surface 3 a in the light emitting element 41 and the light receiving element 42. It is provided at the corresponding position. Specifically, when the substrate 3 is viewed from a direction perpendicular to the mounting surface 3 a, a plurality of vias 33 are provided in a portion covered with the light emitting element 41 and the light receiving element 42.

  In general, vias (also referred to as vias) on a printed circuit board are provided to electrically connect a wiring pattern on one surface of the printed circuit board to a wiring pattern on the other surface. The plurality of vias 33 are used for heat dissipation of the light emitting element 41 and the light receiving element 42. The via 33 penetrates the base material 30 of the substrate 3 in the thickness direction, and the land on the mounting surface 3a side and the land on the back surface 3b side are connected by a cylindrical conductive metal.

  On the substrate 3, a light-emitting element 41 that conducts heat through a plurality of vias 33 and a heat-dissipating layer 9 that dissipates heat from the light-receiving element 42 are disposed in contact with the back surface 3 b. The heat dissipation layer 9 is formed by laminating a metal layer 91 made of metal and a heat dissipation sheet 92 excellent in thermal conductivity and flexibility. As the metal of the metal layer 91, copper, aluminum, gold, or the like excellent in thermal conductivity can be suitably used. As the heat dissipation sheet 92, for example, a silicon-based material or an acrylic-based material can be used.

  In the present embodiment, the heat dissipation layer 9 is disposed between the back surface 3 b of the substrate 3 and the inner surface of the connector case 2. The metal layer 91 is in contact with the back surface 3 b of the substrate 3, and the heat dissipation sheet 92 is in contact with the inner surface 22 a of the second case member 22. Thereby, heat generated in the light emitting element 41 and the light receiving element 42 is thermally conducted to the connector case 2 through the plurality of vias 33, the metal layer 91 of the heat dissipation layer 9 and the heat dissipation sheet 92, and from the outer surface of the connector case 2. Heat is dissipated.

(Operation and effect of the first embodiment)
According to the embodiment described above, the following operations and effects can be obtained.

(1) The MT clip 7 includes a receiving portion 70 that receives a pressing reaction force that presses the MT ferrule 6 against the lens block 5 and a locking portion 72 that is locked to the lens block 5. Thus, both the acting force and the reaction force due to the MT ferrule 6 being pressed are transmitted to the lens block 5. Thereby, the restoring force of the coil spring 8 does not act as a force for moving the lens block 5 with respect to the substrate 3, and the adhesive surface with the substrate 3 does not receive a shearing force based on the restoring force of the coil spring 8. For this reason, for example, the lens block 5 can be fixed to the substrate 3 by adhesion without using a member for holding the lens block such as the lens frame described in Patent Document 1 on the substrate. The cost can be reduced by downsizing and reduction of the number of parts.

(2) Since the coil spring 8 is disposed between the receiving portion 70 of the MT clip 7 and the MT ferrule 6, even if there is a dimensional error in the lens block 5 or the MT ferrule 6, for example, the dimensional error is absorbed. Then, the MT ferrule 6 can be pressed against the lens block 5 with an appropriate pressing force, and the end surface 6b of the MT ferrule 6 and the contact surface 50a of the lens block 5 can be kept in contact with each other.

(3) Since the plurality of optical fibers 11 are inserted through the insertion holes 700 of the receiving portion 70 of the MT clip 7, for example, even if the photoelectric conversion connector 1 receives vibration in the Z direction, the MT clip 7 does not stop. Can be prevented from swinging in the Z direction around the center. That is, the vibration of the MT clip 7 can be suppressed by the plurality of optical fibers 11, thereby preventing the MT clip 7 from being detached from the lens block 5.

(4) The lens block 5 is formed with a recess 504 for locking the pair of locking portions 72 of the MT clip 7 and a storage groove 505 for storing a part of the pair of arm portions 71 of the MT clip 7. Therefore, the pair of arm portions 71 and the locking portions 72 are prevented from protruding from the both side surfaces 5 a of the lens block 5. Thereby, the photoelectric conversion connector 1 can be downsized.

(5) Since the heat generated in the light emitting element 41 and the light receiving element 42 is radiated to the heat dissipation layer 9 through the plurality of vias 33, overheating of the light emitting element 41 and the light receiving element 42 can be suppressed. 41 and the light receiving element 42 can be prevented from being damaged by heat. Further, since the heat radiation layer 9 is disposed between the back surface 3b of the substrate 3 and the inner surface of the connector case 2, the heat radiated to the heat radiation layer 9 is further thermally conducted to the connector case 2, and the light emitting element 41 and Overheating of the light receiving element 42 can be more reliably suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.

  FIG. 7A is a perspective view showing an MT clip 7A as a support member according to the present embodiment. FIG. 7B is a configuration diagram showing a state in which the MT ferrule 6 is pressed against the lens block 5 by the MT clip 7A. FIG.7 (c) is explanatory drawing which shows the shape before and behind elastic deformation of MT clip 7A. In FIG. 7C, the shape of the MT clip 7A in the natural state is indicated by a two-dot chain line, and the shape after elastic deformation attached to the lens block 5 and the MT ferrule 6 is indicated by a solid line.

  In the present embodiment, the shape of the MT clip 7A as a support member is different from that of the first embodiment, and the MT ferrule 6 is elastically pressed against the lens block 5 by the elastic force generated by the MT clip 7A. . The configurations of the lens block 5 and the MT ferrule 6 are the same as those in the first embodiment.

  The MT clip 7A includes a receiving portion 70 that receives a pressing reaction force that presses the MT ferrule 6, a pair of arm portions 71 that sandwich the MT ferrule 6, a locking portion 72 that is locked to the concave portion 504 of the lens block 5, and a receiving portion. A pair of flexible portions 73 respectively provided between the portion 70 and the pair of arm portions 71 are integrally provided. The flexible portion 73 is inclined with an obtuse angle so that the end portion on the arm portion 71 side is separated from the MT ferrule 6 in the X direction with respect to the receiving portion 70 extending in the Y direction.

  When the MT clip 7A is attached to the lens block 5 and the MT ferrule 6, the inclination angle of the pair of flexible portions 73 with respect to the receiving portion 70 changes, and the receiving portion 70 is separated from the locking portion 72. Then, due to the restoring force of the flexible portion 73, the receiving portion 70 comes into contact with the end face 6 b of the MT ferrule 6. The receiving portion 70 is formed with an insertion hole 700 through which a bundle of a plurality of optical fibers 11 is inserted.

(Operation and effect of the second embodiment)
According to the present embodiment, both the acting force caused by the MT ferrule 6 being pressed by the elastic deformation of the pair of flexible portions 73 of the MT clip 7 </ b> A and the reaction force are transmitted to the lens block 5. Thereby, the restoring force of the elastically deformed MT clip 7A does not act as a force for moving the lens block 5 with respect to the substrate 3, and the adhesive surface between the lens block 5 and the substrate 3 does not receive a shearing force. Therefore, similarly to the first embodiment, the lens block 5 can be fixed to the substrate 3 by adhesion, and the photoelectric conversion connector 1 can be reduced in size and cost can be reduced by reducing the number of components. Further, since the coil spring 8 according to the first embodiment is not necessary, the cost can be further reduced by reducing the number of parts.

(Summary of embodiment)
Next, the technical idea grasped from the embodiment described above will be described with reference to the reference numerals in the embodiment. However, each reference numeral in the following description does not limit the constituent elements in the claims to members or the like specifically shown in the embodiment.

[1] A substrate (3), a photoelectric conversion element (light emitting element 41 and light receiving element 42) mounted on the substrate (3), and fixed to the substrate (3) by adhesion, and the photoelectric conversion element (41, 42) a translucent member (lens block 5) serving as an optical path of an optical signal converted into an electrical signal, and an optical fiber (e.g., elastically pressed against the translucent member (5) to propagate the optical signal) 11) an optical fiber holding member (MT ferrule 6) for holding the end portion, and a support member (MT clips 7, 7A) for supporting the optical fiber holding member (6) with respect to the translucent member (5). The support member (7, 7A) includes a receiving portion (70) that receives a pressing reaction force that presses the optical fiber holding member (6), and a latch that is locked to the translucent member (5). Optical module (light) having stop (72) Conversion connector 1).

[2] The support member (7) has a pair of arm portions (71) that sandwich the optical fiber holding member (6), and the locking portion (71) is provided at each tip of the pair of arm portions (71). 72), and the translucent member (5) has a recess (504) for locking the locking portion (72), and the pair of arm portions (71) communicating with the recess (504). The optical module (1) according to the above [1], in which a housing groove (505) in which a part of the housing is housed is formed.

[3] Between the receiving part (70) of the support member (7) and the optical fiber holding member (6), the optical fiber holding member (6) is elastic to the translucent member (5). The optical module (1) according to the above [1] or [2], in which an elastic member (coil spring 8) that generates an elastic force to be pressed is disposed.

[4] The support member (7A) includes a pair of flexible portions (73) that can be elastically deformed between the receiving portion (70) and the pair of arm portions (71). The optical module (1) according to [2], wherein 70) is in contact with the optical fiber holding member (6) by the restoring force of the flexible portion (73).

[5] The receiving portion (70) of the support member (7, 7A) is formed with an insertion hole (700) through which the optical fiber (11) is inserted. The optical module (1) according to any one of the above.

[6] The translucent member (5) is bonded to the mounting surface (3a) of the substrate (3) on which the photoelectric conversion elements (41, 42) are mounted, and the substrate (3) Vias (33) penetrating between the mounting surface (3a) and the back surface (3b) on the back side of the mounting surface (3a) are provided at positions corresponding to the photoelectric conversion elements (41, 42). The heat dissipation layer (9) that dissipates heat of the photoelectric conversion element (41, 42) that conducts heat through 33) is disposed in contact with the back surface (3b) of the substrate (3). ] To [5] The optical module according to any one of [5].

[7] The substrate (3) is housed in a metal housing (connector case 2), and is between the back surface (3b) of the substrate (3) and the inner surface (22a) of the housing (2). The optical module (1) according to [6], wherein the heat dissipation layer (9) is disposed on the optical module.

(Appendix)
While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

1 ... Photoelectric conversion connector (optical module)
11: Optical fiber 2 ... Connector case (housing)
3 ... Substrate 33 ... Via 3a ... Mounting surface 41 ... Light emitting element (photoelectric conversion element)
42. Light receiving element (photoelectric conversion element)
5. Lens block (translucent member)
504 ... Recess 505 ... Housing groove 6 ... MT ferrule (optical fiber holding member)
7, 7A ... MT clip (support member)
70 ... receiving part 700 ... insertion hole 71 ... arm part 72 ... locking part 73 ... flexible part 8 ... coil spring (elastic member)
9 ... Heat dissipation layer

Claims (7)

A substrate,
A photoelectric conversion element mounted on the substrate;
A translucent member that is fixed to the substrate by adhesion and serves as an optical path of an optical signal that is converted into an electrical signal by the photoelectric conversion element;
An optical fiber holding member that is elastically pressed against the translucent member and holds an end of the optical fiber through which the optical signal propagates;
A support member for supporting the optical fiber holding member with respect to the translucent member,
The support member includes a receiving portion that receives a pressing reaction force that presses the optical fiber holding member, and a locking portion that is locked to the translucent member.
Optical module. The support member has a pair of arm portions sandwiching the optical fiber holding member, and the locking portion is provided at each tip of the pair of arm portions,
The translucent member is formed with a recess that locks the locking portion, and an accommodation groove that communicates with the recess and accommodates a part of the pair of arm portions.
The optical module according to claim 1. Between the receiving portion of the support member and the optical fiber holding member, an elastic member that generates an elastic force that elastically presses the optical fiber holding member against the translucent member is disposed.
The optical module according to claim 1 or 2. The support member has a pair of flexible portions that can be elastically deformed between the receiving portion and the pair of arm portions, and the receiving portion contacts the optical fiber holding member by a restoring force of the flexible portion. Touching,
The optical module according to claim 2. An insertion hole for inserting the optical fiber is formed in the receiving portion of the support member.
The optical module according to claim 1. The translucent member is bonded to the mounting surface of the substrate on which the photoelectric conversion element is mounted,
The substrate is provided with vias penetrating between the mounting surface and the back surface on the back side of the mounting surface at positions corresponding to the photoelectric conversion elements,
A heat dissipation layer that dissipates heat of the photoelectric conversion element that conducts heat through the via is disposed in contact with the back surface of the substrate;
The optical module according to claim 1. The substrate is housed in a metal housing,
The heat dissipation layer is disposed between the back surface of the substrate and the inner surface of the housing.
The optical module according to claim 6.

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