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JP2020134816A - Optical receptacle and optical module - Google Patents

Optical receptacle and optical module Download PDF

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JP2020134816A
JP2020134816A JP2019030364A JP2019030364A JP2020134816A JP 2020134816 A JP2020134816 A JP 2020134816A JP 2019030364 A JP2019030364 A JP 2019030364A JP 2019030364 A JP2019030364 A JP 2019030364A JP 2020134816 A JP2020134816 A JP 2020134816A
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optical
light receiving
light
incident
receiving element
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卓幸 助川
Takuyuki Sukegawa
卓幸 助川
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Enplas Corp
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Enplas Corp
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Priority to JP2019030364A priority Critical patent/JP2020134816A/en
Priority to PCT/JP2020/004343 priority patent/WO2020170821A1/en
Priority to TW109105161A priority patent/TW202109105A/en
Publication of JP2020134816A publication Critical patent/JP2020134816A/en
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Light Receiving Elements (AREA)

Abstract

To provide an optical receptacle capable of maintaining high optical coupling efficiency even when an optical transmission body with large cores is used.SOLUTION: An optical receptacle 140 for optically coupling an end face 162 of am optical transmission body 160 to an end face 123 of a light receiving element 122 when arranged between the optical transmission body 160 and the light receiving element 122, includes: a first optical surface 141 receiving light emitted from the end face 162 of the optical transmission body 160; a second optical surface 143 emitting the light entering the first optical surface 141 toward the light receiving element 122; and a reflection part 142 arranged so as to surround an optical axis between the first optical surface 141 and the second optical surface 143, and reflecting part of the light entering the first optical surface 141 toward the second optical surface 143.SELECTED DRAWING: Figure 1

Description

本発明は、光レセプタクルおよび光モジュールに関する。 The present invention relates to optical receptacles and optical modules.

従来、光ファイバーや光導波路などの光伝送体を用いた光通信には、発光素子を備えた送信用の光モジュールと、受光素子を備えた受信用の光モジュールとが使用されている。受信用の光モジュールは、光伝送体の端面から出射された通信情報を含む光を、受光素子の受光面に入射させるための光レセプタクルを有する（例えば、特許文献１参照）。 Conventionally, in optical communication using an optical transmitter such as an optical fiber or an optical waveguide, an optical module for transmission provided with a light emitting element and an optical module for reception provided with a light receiving element have been used. The optical module for reception has an optical receptacle for incident light including communication information emitted from an end surface of an optical transmitter onto a light receiving surface of a light receiving element (see, for example, Patent Document 1).

特許文献１には、フェルールに固定された光ファイバーと、ステムに固定された受光素子とを光学的に接続させるホルダを有する、レンズ一体型レセプタクルが記載されている。ホルダは、光ファイバーの端面から出射された光を入射させる入射面と、入射面で入射した光を受光素子の受光面に向かって出射させるレンズと、を有する。特許文献１に記載のレンズ一体型レセプタクルでは、光ファイバーの端面から出射した光は、入射面で入射し、レンズから出射されて受光素子に到達する。 Patent Document 1 describes a lens-integrated receptacle having a holder for optically connecting an optical fiber fixed to a ferrule and a light receiving element fixed to a stem. The holder has an incident surface for incident light emitted from the end surface of the optical fiber and a lens for emitting light incident on the incident surface toward the light receiving surface of the light receiving element. In the lens-integrated receptacle described in Patent Document 1, the light emitted from the end surface of the optical fiber is incident on the incident surface, emitted from the lens, and reaches the light receiving element.

特開２０１０−１０７６９２号公報JP-A-2010-107692

特許文献１に記載されたレンズ一体型レセプタクルでは、光ファイバーの端面から出射された光は、入射面で入射した後も拡がり続ける。したがって、例えば光ファイバーのコア径が大きい場合、コアの端面から出射された光の一部は、入射面で入射した後にレンズに到達することができず、受光素子に到達することもできない。このように、特許文献１に記載されたレンズ一体レセプタクルには、光伝送体のコアが大きい場合に、光伝送体の端面と受光素子との間の光結合効率が低下してしまうという問題がある。 In the lens-integrated receptacle described in Patent Document 1, the light emitted from the end surface of the optical fiber continues to spread even after being incident on the incident surface. Therefore, for example, when the core diameter of the optical fiber is large, a part of the light emitted from the end surface of the core cannot reach the lens after being incident on the incident surface, and cannot reach the light receiving element. As described above, the lens-integrated receptacle described in Patent Document 1 has a problem that the optical coupling efficiency between the end face of the optical transmitter and the light receiving element is lowered when the core of the optical transmitter is large. is there.

本発明の目的は、コアが大きな光伝送体を用いた場合であっても、高い光結合効率を維持できる光レセプタクルおよび光モジュールを提供することである。 An object of the present invention is to provide an optical receptacle and an optical module that can maintain high optical coupling efficiency even when an optical transmitter having a large core is used.

本発明に係る光レセプタクルは、光伝送体と、受光素子との間に配置されたときに、前記光伝送体の端面と前記受光素子の受光面とを光学的に結合するための光レセプタクルであって、前記光伝送体の端面から出射された光を入射させる第１光学面と、前記第１光学面で入射した光を、前記受光素子に向けて出射させる第２光学面と、前記第１光学面と前記第２光学面との間の光軸を取り囲むように配置されており、前記第１光学面で入射した光の一部を、前記第２光学面に向けて反射させる反射部と、を有する。 The optical receptacle according to the present invention is an optical receptacle for optically coupling an end surface of the optical transmitter and a light receiving surface of the light receiving element when arranged between the optical transmitter and the light receiving element. A first optical surface for incident light emitted from an end surface of the optical transmitter, a second optical surface for emitting light incident on the first optical surface toward the light receiving element, and the first optical surface. A reflecting unit that is arranged so as to surround an optical axis between the first optical surface and the second optical surface and reflects a part of the light incident on the first optical surface toward the second optical surface. And have.

本発明に係る光モジュールは、基板と、前記基板上に配置された受光素子とを有する光電変換装置と、本発明の光レセプタクルと、を有する。 The optical module according to the present invention includes a substrate, a photoelectric conversion device having a light receiving element arranged on the substrate, and an optical receptacle of the present invention.

本発明によれば、コアが大きな光伝送体を用いた場合であっても、高い光結合効率を維持できる光レセプタクルおよび光モジュールを提供できる。 According to the present invention, it is possible to provide an optical receptacle and an optical module that can maintain high optical coupling efficiency even when an optical transmitter having a large core is used.

図１Ａ、Ｂは、本発明の一実施の形態に係る光モジュールの構成を示す図である。1A and 1B are diagrams showing the configuration of an optical module according to an embodiment of the present invention. 図２Ａは、比較例に係る光モジュールの光路の一部を示す図であり、図２Ｂは、本実施の形態に係る光モジュールの光路の一部を示す図である。FIG. 2A is a diagram showing a part of the optical path of the optical module according to the comparative example, and FIG. 2B is a diagram showing a part of the optical path of the optical module according to the present embodiment.

以下、本発明の一実施の形態に係る光モジュールについて、添付した図面を参照して詳細に説明する。 Hereinafter, the optical module according to the embodiment of the present invention will be described in detail with reference to the attached drawings.

（光モジュールの構成）
図１Ａ、Ｂは、本発明の一実施の形態に係る光モジュール１００の構成を示す図である。図１Ａは、光モジュール１００の平面図であり、図１Ｂは、図１Ａに示されるＡ−Ａ線の断面図である。図１Ａ、Ｂでは、光伝送体１６０を破線で示している。 (Optical module configuration)
1A and 1B are diagrams showing the configuration of an optical module 100 according to an embodiment of the present invention. 1A is a plan view of the optical module 100, and FIG. 1B is a cross-sectional view taken along the line AA shown in FIG. 1A. In FIGS. 1A and 1B, the optical transmitter 160 is shown by a broken line.

図１Ａ、Ｂに示されるように、光モジュール１００は、受光素子１２２を含む基板実装型の光電変換装置１２０と、光レセプタクル１４０とを有する。光モジュール１００は、受信用の光モジュールであり、光レセプタクル１４０に光伝送体１６０が結合（以下、接続ともいう）されて使用される。 As shown in FIGS. 1A and 1B, the optical module 100 includes a substrate-mounted photoelectric conversion device 120 including a light receiving element 122 and an optical receptacle 140. The optical module 100 is an optical module for reception, and is used by coupling (hereinafter, also referred to as connection) an optical transmitter 160 to an optical receptacle 140.

光電変換装置１２０は、基板１２１と、受光素子１２２とを有する。 The photoelectric conversion device 120 includes a substrate 121 and a light receiving element 122.

基板１２１は、受光素子１２２を支持するとともに、光レセプタクル１４０に対して固定される。基板１２１は、例えば、ガラスコンポジット基板やガラスエポキシ基板、フレキブシル基板などである。基板１２１上には、受光素子１２２が配置されている。 The substrate 121 supports the light receiving element 122 and is fixed to the optical receptacle 140. The substrate 121 is, for example, a glass composite substrate, a glass epoxy substrate, a flexible sill substrate, or the like. A light receiving element 122 is arranged on the substrate 121.

受光素子１２２は、光伝送体１６０から出射された光を受光する。受光素子１２２は、例えば、フォトディテクターである。受光素子１２２の数は、特に限定されず、光レセプタクル１４０の構成に合わせて選択される。本実施の形態では、受光素子１２２の数は、１つである。 The light receiving element 122 receives the light emitted from the optical transmitter 160. The light receiving element 122 is, for example, a photo detector. The number of light receiving elements 122 is not particularly limited, and is selected according to the configuration of the optical receptacle 140. In the present embodiment, the number of light receiving elements 122 is one.

光レセプタクル１４０は、光電変換装置１２０の基板１２１上に配置されている。光レセプタクル１４０は、光電変換装置１２０と光伝送体１６０との間に配置された状態で、光伝送体１６０の端面１６２と、受光素子１２２の受光面１２３とを光学的に結合させる。本実施の形態では、光レセプタクル１４０は、１本の光伝送体１６０の端面１６２と、１つの受光素子１２２の受光面１２３とを光学的に結合させるが、光レセプタクル１４０は、複数の光伝送体１６０の端面１６２と、複数の受光素子１２２の受光面１２３とをそれぞれ光学的に結合させてもよい。光レセプタクル１４０の構成については、別途詳細に説明する。 The optical receptacle 140 is arranged on the substrate 121 of the photoelectric conversion device 120. The optical receptacle 140 optically couples the end surface 162 of the optical transmitter 160 and the light receiving surface 123 of the light receiving element 122 in a state of being arranged between the photoelectric conversion device 120 and the optical transmitter 160. In the present embodiment, the optical receptacle 140 optically couples the end surface 162 of one optical transmitter 160 and the light receiving surface 123 of one light receiving element 122, but the optical receptacle 140 optically transmits a plurality of optical transmissions. The end surface 162 of the body 160 and the light receiving surface 123 of the plurality of light receiving elements 122 may be optically coupled to each other. The configuration of the optical receptacle 140 will be described in detail separately.

光伝送体１６０の種類は、特に限定されない。光伝送体１６０の種類の例には、光ファイバー、光導波路が含まれる。本実施の形態では、光伝送体１６０は、プラスチック光ファイバー（ＰＯＦ）などのコア径が大きい光ファイバーである。光伝送体１６０の数は、特に限定されず、光レセプタクル１４０の構成に合わせて選択される。光伝送体１６０の数は、１つでもよいし、複数でもよい。本実施の形態では、光伝送体１６０の数は、１本である。 The type of the optical transmitter 160 is not particularly limited. Examples of the types of the optical transmitter 160 include optical fibers and optical waveguides. In the present embodiment, the optical transmitter 160 is an optical fiber having a large core diameter, such as a plastic optical fiber (POF). The number of optical transmitters 160 is not particularly limited and is selected according to the configuration of the optical receptacle 140. The number of optical transmitters 160 may be one or plural. In the present embodiment, the number of optical transmitters 160 is one.

（光レセプタクルの構成）
光レセプタクル１４０は、透光性を有し、光伝送体１６０の端面１６２から出射された光の少なくとも一部を、受光素子１２２の受光面１２３に向けて出射させる。光レセプタクル１４０は、入射面１４１と、反射面１４２と、出射面１４３とを有する。本実施の形態では、入射面１４１、反射面１４２および出射面１４３の数は、それぞれ１つであり、光レセプタクル１４０の形状は、回転対称（円対称）である。本実施の形態では、光伝送体１６０を位置決めするための位置決め部１４４と、基板１２１を固定するための基板固定部１４５とをさらに有する。 (Composition of optical receptacle)
The optical receptacle 140 has translucency, and emits at least a part of the light emitted from the end surface 162 of the optical transmitter 160 toward the light receiving surface 123 of the light receiving element 122. The optical receptacle 140 has an incident surface 141, a reflecting surface 142, and an emitting surface 143. In the present embodiment, the number of the entrance surface 141, the reflection surface 142, and the exit surface 143 is one, and the shape of the optical receptacle 140 is rotationally symmetric (circular symmetry). In the present embodiment, it further has a positioning portion 144 for positioning the optical transmitter 160 and a substrate fixing portion 145 for fixing the substrate 121.

光レセプタクル１４０は、光通信に用いられる波長の光に対して透光性を有する材料を用いて形成される。そのような材料の例には、ポリエーテルイミド（ＰＥＩ）や環状オレフィン樹脂などの透明な樹脂が含まれる。また、光レセプタクル１４０は、例えば、射出成形により製造される。 The optical receptacle 140 is formed by using a material having translucency with respect to light having a wavelength used for optical communication. Examples of such materials include transparent resins such as polyetherimide (PEI) and cyclic olefin resins. Further, the optical receptacle 140 is manufactured by injection molding, for example.

位置決め部１４４は、光レセプタクル１４０に対して、光伝送体１６０の端面１６２を位置決めする。位置決め部１４４の構成は、上記の機能を発揮できれば特に限定されない。本実施の形態では、位置決め部１４４は、円筒形状である。位置決め部１４４の開口部から光伝送体１６０を挿入することで、位置決め部１４４の内空部に光伝送体１６０の端部が配置される。位置決め部１４４の底部には、第１凹部１４６および第２凹部１４７が配置されている。 The positioning unit 144 positions the end face 162 of the optical transmitter 160 with respect to the optical receptacle 140. The configuration of the positioning unit 144 is not particularly limited as long as the above functions can be exhibited. In the present embodiment, the positioning portion 144 has a cylindrical shape. By inserting the optical transmission body 160 through the opening of the positioning unit 144, the end portion of the optical transmission body 160 is arranged in the inner space of the positioning unit 144. A first recess 146 and a second recess 147 are arranged at the bottom of the positioning portion 144.

入射面１４１は、光伝送体１６０の端面１６２から出射された光を光レセプタクル１４０の内部に入射させる光学面である。入射面１４１は、位置決め部１４４の底部に形成された第１凹部１４６の内面である。入射面１４１の形状は、特に限定されない。入射面１４１は、光伝送体１６０に向かって凸状の凸レンズ面でもよいし、光伝送体１６０に対して凹状の凹レンズ面でもよいし、平面であってもよい。本実施の形態では、入射面１４１は、平面である第１凹部１４６の底面と、底面および第１凹部１４６の開口縁を繋ぐ円筒形状の側面とを有する。入射面１４１の平面視形状は、特に限定されない。入射面１４１の平面視形状は、円形状でもよいし、多角形状でもよい。本実施の形態では、入射面１４１の平面視形状は、円形状である。 The incident surface 141 is an optical surface that causes the light emitted from the end surface 162 of the optical transmitter 160 to enter the inside of the optical receptacle 140. The incident surface 141 is the inner surface of the first recess 146 formed at the bottom of the positioning portion 144. The shape of the incident surface 141 is not particularly limited. The incident surface 141 may be a convex lens surface that is convex toward the optical transmitter 160, a concave lens surface that is concave with respect to the optical transmitter 160, or may be a flat surface. In the present embodiment, the incident surface 141 has a flat bottom surface of the first recess 146 and a cylindrical side surface connecting the bottom surface and the opening edge of the first recess 146. The plan view shape of the incident surface 141 is not particularly limited. The plan view shape of the incident surface 141 may be a circular shape or a polygonal shape. In the present embodiment, the plane view shape of the incident surface 141 is circular.

入射面１４１の大きさは、特に限定されないが、光伝送体１６０のコアの端面と同じかそれよりも大きいことが好ましい。本実施の形態では、入射面１４１の大きさは、光伝送体１６０のコアの端面よりも大きい。入射面１４１の中心軸ＣＡ１は、光伝送体１６０の端面１６２に対して垂直でもよいし、垂直でなくてもよいが、光伝送体１６０の端面１６２に対して垂直であることが好ましい。第１光学面１４１の中心軸ＣＡ１は、光伝送体１６０の端面１６２から出射された光の光軸ＯＡと一致することが好ましい。 The size of the incident surface 141 is not particularly limited, but is preferably the same as or larger than the end surface of the core of the optical transmitter 160. In the present embodiment, the size of the incident surface 141 is larger than the end surface of the core of the optical transmitter 160. The central axis CA1 of the incident surface 141 may or may not be perpendicular to the end surface 162 of the optical transmitter 160, but is preferably perpendicular to the end surface 162 of the optical transmitter 160. It is preferable that the central axis CA1 of the first optical surface 141 coincides with the optical axis OA of the light emitted from the end surface 162 of the optical transmitter 160.

第１凹部１４６の底部に入射面１４１を配置することで、光伝送体１６０のコアの端面と入射面１４１とを離間させることができ、光伝送体１６０のコアの端面および入射面１４１が傷つくことを抑制できる。光伝送体１６０の端面１６２と入射面１４１との間隔は、光レセプタクル１４０の倍率に応じて適宜設定される。 By arranging the incident surface 141 at the bottom of the first recess 146, the end surface of the core of the optical transmitter 160 and the incident surface 141 can be separated from each other, and the end surface of the core of the optical transmitter 160 and the incident surface 141 are damaged. Can be suppressed. The distance between the end surface 162 of the optical transmitter 160 and the incident surface 141 is appropriately set according to the magnification of the optical receptacle 140.

反射面１４２は、入射面１４１で入射した光のうち、一部の光（入射面１４１の中心軸ＣＡ１に対して大きな角度で進行する光）を出射面１４３に向けて反射させる。反射面１４２は、位置決め部１４４の底部において、入射面１４１と出射面１４３との間の光軸（光路）を取り囲むように形成された円環状の第２凹部１４７の内側面である。本実施の形態では、反射面１４２は、入射面１４１で入射した光のうち、入射面１４１の中心軸ＣＡ１に対して大きな角度で進行する光（このままでは出射面１４３に到達しない光）を出射面１４３に向けて全反射させるように設計されている。入射面１４１の中心軸ＣＡ１を含む断面にける反射面１４２の形状は、特に限定されない。当該断面における反射面１４２の形状は、直線状でもよいし、中心軸ＣＡ１に向かって凸の曲線状でもよいし、中心軸ＣＡ１に対して凹の曲線状でもよい。本実施の形態では、当該断面における反射面１４２の形状は、入射面１４１側から出射面１４３側に向かうにつれて中心軸ＣＡ１から離れる直線である。入射面１４１で入射した光のうち、一部の光（入射面１４１の中心軸ＣＡ１に対して小さな角度で進行する光）は、他の面を経由することなく出射面１４３に到達する。一方、入射面１４１で入射した光のうち、他の一部の光（入射面１４１の中心軸ＣＡ１に対して大きな角度で進行する光）は、反射面１４２で内部反射して、出射面１４３に向かうように制御される。 The reflecting surface 142 reflects a part of the light incident on the incident surface 141 (light traveling at a large angle with respect to the central axis CA1 of the incident surface 141) toward the exit surface 143. The reflecting surface 142 is an inner surface of an annular second recess 147 formed at the bottom of the positioning portion 144 so as to surround an optical axis (optical path) between the incident surface 141 and the exit surface 143. In the present embodiment, the reflecting surface 142 emits light that travels at a large angle with respect to the central axis CA1 of the incident surface 141 (light that does not reach the exit surface 143 as it is) among the light incident on the incident surface 141. It is designed to be totally reflected towards surface 143. The shape of the reflecting surface 142 on the cross section including the central axis CA1 of the incident surface 141 is not particularly limited. The shape of the reflecting surface 142 in the cross section may be a straight line, a curved line convex toward the central axis CA1, or a curved line concave with respect to the central axis CA1. In the present embodiment, the shape of the reflecting surface 142 in the cross section is a straight line that separates from the central axis CA1 from the incident surface 141 side toward the exit surface 143 side. Of the light incident on the incident surface 141, some of the light (light traveling at a small angle with respect to the central axis CA1 of the incident surface 141) reaches the exit surface 143 without passing through the other surface. On the other hand, among the light incident on the incident surface 141, some other light (light traveling at a large angle with respect to the central axis CA1 of the incident surface 141) is internally reflected by the reflecting surface 142 and is internally reflected by the emitting surface 143. It is controlled to go to.

位置決め部１４４における第１凹部１４６および第２凹部１４７で区画された領域は、光伝送体１６０のクラッドに接触する。これにより、光伝送体１６０の端面１６２から出射される光の進行を妨げることなく、光レセプタクル１４０に光伝送体１６０の端面１６２を位置決めできる。 The region partitioned by the first recess 146 and the second recess 147 in the positioning portion 144 contacts the cladding of the optical transmitter 160. As a result, the end face 162 of the optical transmitter 160 can be positioned on the optical receptacle 140 without hindering the progress of the light emitted from the end face 162 of the optical transmitter 160.

出射面１４３は、入射面１４１または反射面１４２から進行してきた光を、受光素子１２２の受光面１２３に向けて出射させる光学面である。本実施の形態では、出射面１４３は、受光素子１２２の受光面１２３と対向するように、入射面１４１と反対側に配置されている。出射面１４３の形状は、特に限定されない。出射面１４３は、受光素子１２２の受光面に向かって凸状の凸レンズ面でもよいし、受光素子１２２の受光面に対して凹状の凸レンズ面でもよいし、平面であってもよい。本実施の形態では、出射面１４３の形状は、受光素子１２２の受光面に向かって凸状の凸レンズ面である。これにより、入射面１４１で入射した光と、入射面１４１で入射し、反射面１４２で反射した光とを集光させて、受光素子１２２の受光面１２３に効率良く到達させることができる。 The exit surface 143 is an optical surface that emits light traveling from the incident surface 141 or the reflecting surface 142 toward the light receiving surface 123 of the light receiving element 122. In the present embodiment, the exit surface 143 is arranged on the opposite side of the incident surface 141 so as to face the light receiving surface 123 of the light receiving element 122. The shape of the exit surface 143 is not particularly limited. The exit surface 143 may be a convex lens surface that is convex toward the light receiving surface of the light receiving element 122, a convex lens surface that is concave with respect to the light receiving surface of the light receiving element 122, or may be a flat surface. In the present embodiment, the shape of the exit surface 143 is a convex lens surface that is convex toward the light receiving surface of the light receiving element 122. As a result, the light incident on the incident surface 141 and the light incident on the incident surface 141 and reflected by the reflecting surface 142 can be condensed and efficiently reached the light receiving surface 123 of the light receiving element 122.

基板固定部１４５は、光レセプタクル１４０に対して、光電変換装置１２０の基板１２１を固定する。基板固定部１４５の構成は、上記の機能を発揮できれば特に限定されない。本実施の形態では、基板固定部１４５は、円筒形状である。基板固定部１４５の内周面には、段部１４８が形成されている。段部１４８の形状は、出射面１４３の中心軸ＣＡ２を取り囲むように、基板固定部１４５の内周面の周方向全体に配置されていてもよいし、基板固定部１４５の内周面の一部に配置されていてもよい。本実施の形態では、段部１４８は、基板固定部１４５の内周面の周方向全体に配置されている。 The substrate fixing portion 145 fixes the substrate 121 of the photoelectric conversion device 120 to the optical receptacle 140. The configuration of the substrate fixing portion 145 is not particularly limited as long as the above functions can be exhibited. In the present embodiment, the substrate fixing portion 145 has a cylindrical shape. A step portion 148 is formed on the inner peripheral surface of the substrate fixing portion 145. The shape of the step portion 148 may be arranged in the entire circumferential direction of the inner peripheral surface of the substrate fixing portion 145 so as to surround the central axis CA2 of the exit surface 143, or one of the inner peripheral surfaces of the substrate fixing portion 145. It may be arranged in a section. In the present embodiment, the step portions 148 are arranged in the entire circumferential direction of the inner peripheral surface of the substrate fixing portion 145.

ここで、本実施の形態に係る光モジュール１００における光路について説明する。また、比較のため、反射面１４２を有さない比較用の光モジュール２００における光路についても説明する。比較用の光モジュール２００は、反射面１４２を有しておらず、かつ入射面２４１が本実施の形態における入射面１４１よりも出射面１４３側に位置することを除いて、本実施の形態に係る光モジュール１００と同じである。図２Ａは、比較用の光モジュール２００における光路の一部を示す図であり、図２Ｂは、本実施の形態に係る光モジュール１００における光路の一部を示す図である。なお、図２Ａ、Ｂでは、光伝送体１６０のコアの端面の外縁部から出射された光のみを二点鎖線で示している。図２Ａ、Ｂでは、光路を図示するために、ハッチングを省略している。 Here, the optical path in the optical module 100 according to the present embodiment will be described. Further, for comparison, an optical path in the comparative optical module 200 having no reflecting surface 142 will also be described. The optical module 200 for comparison has the present embodiment except that the light module 200 does not have the reflecting surface 142 and the incident surface 241 is located closer to the exit surface 143 than the incident surface 141 in the present embodiment. It is the same as the optical module 100. FIG. 2A is a diagram showing a part of the optical path in the optical module 200 for comparison, and FIG. 2B is a diagram showing a part of the optical path in the optical module 100 according to the present embodiment. In FIGS. 2A and 2B, only the light emitted from the outer edge of the end face of the core of the optical transmitter 160 is shown by a chain double-dashed line. In FIGS. 2A and 2B, hatching is omitted in order to illustrate the optical path.

図２Ａに示されるように、比較用の光モジュール２００では、光伝送体１６０のコアの端面の外縁部から出射された光は、光レセプタクル２４０の入射面２４１（側面）で入射する。この光は、入射面２４１の中心軸ＣＡ１および出射面１４３の中心軸ＣＡ２から離れるように進行する。その結果、この光は、出射面１４３に到達することなく、出射面１４３以外の領域から外部に出射されてしまう。 As shown in FIG. 2A, in the optical module 200 for comparison, the light emitted from the outer edge of the end surface of the core of the optical transmitter 160 is incident on the incident surface 241 (side surface) of the optical receptacle 240. This light travels away from the central axis CA1 of the incident surface 241 and the central axis CA2 of the exit surface 143. As a result, this light is emitted to the outside from a region other than the exit surface 143 without reaching the exit surface 143.

一方、図２Ｂに示されるように、本実施の形態に係る光モジュール１００では、光伝送体１６０のコアの端面の外縁部から出射された光は、入射面１４１（底面）で入射する。この光は、入射面１４１の中心軸ＣＡ１および出射面１４３の中心軸ＣＡ２から離れるように進行するが、反射面１４２で出射面１４３に向けて反射される。その結果、この光は、出射面１４３から受光素子１２２の受光面１２３に集光するように出射される。 On the other hand, as shown in FIG. 2B, in the optical module 100 according to the present embodiment, the light emitted from the outer edge of the end surface of the core of the optical transmitter 160 is incident on the incident surface 141 (bottom surface). This light travels away from the central axis CA1 of the entrance surface 141 and the central axis CA2 of the exit surface 143, but is reflected by the reflection surface 142 toward the exit surface 143. As a result, this light is emitted from the exit surface 143 so as to be focused on the light receiving surface 123 of the light receiving element 122.

（効果）
本実施の形態に係る光モジュール１００は、入射面１４１で入射した光を出射面１４３に向けて反射させる反射面を有しているため、コアの大きな光伝送体１６０を用いた場合であっても、光の損失を抑制できる。よって、光伝送体１６０から出射された光の受光素子１２３に対する高い光結合効率を維持できる。 (effect)
Since the optical module 100 according to the present embodiment has a reflecting surface that reflects the light incident on the incident surface 141 toward the exit surface 143, it is a case where the optical transmitter 160 having a large core is used. However, the loss of light can be suppressed. Therefore, high optical coupling efficiency of the light emitted from the optical transmitter 160 with respect to the light receiving element 123 can be maintained.

本発明に係る光レセプタクルおよび光モジュールは、例えば光伝送体を用いた光通信に有用である。 The optical receptacle and the optical module according to the present invention are useful for optical communication using, for example, an optical transmitter.

１００、２００ 光モジュール
１２０ 光電変換装置
１２１ 基板
１２２ 受光素子
１２３ 受光面
１４０、２４０ 光レセプタクル
１４１、２４１ 入射面
１４２ 反射面
１４３ 出射面
１４４ 位置決め部
１４５ 基板固定部
１４６ 第１凹部
１４７ 第２凹部
１４８ 段部
１６０ 光伝送体
１６２ 端面
ＯＡ 光軸
ＣＡ１ 入射面の中心軸
ＣＡ２ 出射面の中心軸 100, 200 Optical module 120 Photoelectric conversion device 121 Substrate 122 Light receiving element 123 Light receiving surface 140, 240 Optical receptacle 141, 241 Incident surface 142 Reflective surface 143 Exit surface 144 Positioning part 145 Board fixing part 146 First concave part 147 Second concave part 148 steps Part 160 Optical transmitter 162 End surface OA Optical axis CA1 Central axis of incident surface CA2 Central axis of exit surface

Claims (3)

光伝送体と、受光素子との間に配置されたときに、前記光伝送体の端面と前記受光素子の受光面とを光学的に結合するための光レセプタクルであって、
前記光伝送体の端面から出射された光を入射させる第１光学面と、
前記第１光学面で入射した光を、前記受光素子に向けて出射させる第２光学面と、
前記第１光学面と前記第２光学面との間の光軸を取り囲むように配置されており、前記第１光学面で入射した光の一部を、前記第２光学面に向けて反射させる反射部と、
を有する、光レセプタクル。 An optical receptacle for optically coupling an end surface of the optical transmitter and a light receiving surface of the light receiving element when arranged between the optical transmitter and the light receiving element.
A first optical surface for incident light emitted from the end surface of the optical transmitter and
A second optical surface that emits light incident on the first optical surface toward the light receiving element, and
It is arranged so as to surround the optical axis between the first optical surface and the second optical surface, and a part of the light incident on the first optical surface is reflected toward the second optical surface. Reflector and
Has an optical receptacle. 前記反射部は、前記第１光学面で入射した光を前記第２光学面に向けて全反射させる、請求項１に記載の光レセプタクル。 The optical receptacle according to claim 1, wherein the reflecting unit totally reflects the light incident on the first optical surface toward the second optical surface. 基板と、前記基板上に配置された受光素子とを有する光電変換装置と、
請求項１に記載の光レセプタクルと、
を有する、光モジュール。 A photoelectric conversion device having a substrate and a light receiving element arranged on the substrate, and
The optical receptacle according to claim 1 and
Has an optical module.
JP2019030364A 2019-02-22 2019-02-22 Optical receptacle and optical module Pending JP2020134816A (en)

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Citations (5)

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US5631987A (en) * 1995-06-07 1997-05-20 Reliaspeed, Inc. Low cost, mode-field matched, high performance laser transmitter optical subassembly
JPH09269440A (en) * 1996-03-29 1997-10-14 Sumitomo Electric Ind Ltd Light transmitting and receiving module
JP2001133665A (en) * 1999-11-08 2001-05-18 Yazaki Corp Sleeve for optical connector and receptacle
WO2010007861A1 (en) * 2008-07-18 2010-01-21 アルプス電気株式会社 Optical connector
JP2014048493A (en) * 2012-08-31 2014-03-17 Hitachi Chemical Co Ltd Optical member and optical device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631987A (en) * 1995-06-07 1997-05-20 Reliaspeed, Inc. Low cost, mode-field matched, high performance laser transmitter optical subassembly
JPH09269440A (en) * 1996-03-29 1997-10-14 Sumitomo Electric Ind Ltd Light transmitting and receiving module
JP2001133665A (en) * 1999-11-08 2001-05-18 Yazaki Corp Sleeve for optical connector and receptacle
WO2010007861A1 (en) * 2008-07-18 2010-01-21 アルプス電気株式会社 Optical connector
JP2014048493A (en) * 2012-08-31 2014-03-17 Hitachi Chemical Co Ltd Optical member and optical device

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