WO2010095312A1 - Optical transmission module - Google Patents
Optical transmission module Download PDFInfo
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- WO2010095312A1 WO2010095312A1 PCT/JP2009/068269 JP2009068269W WO2010095312A1 WO 2010095312 A1 WO2010095312 A1 WO 2010095312A1 JP 2009068269 W JP2009068269 W JP 2009068269W WO 2010095312 A1 WO2010095312 A1 WO 2010095312A1
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- optical
- ferrule
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- optical ferrule
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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
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4228—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements
- G02B6/423—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements using guiding surfaces for the alignment
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- the module body in which the circuit module and the optical ferrule are fitted can be lowered.
- the optical transmission module can be prevented from becoming bulky, and the height can be reduced.
- the optical transmission module of the present invention does not require the two lenses conventionally provided, and thus the configuration can be simplified.
- the optical ferrule 8 has a flange portion 28 protruding in the horizontal direction, and the side surfaces 28a and 28b of the flange portion 28 and the lower surface of the flange portion 28 form an obtuse angle.
- the left side surface 28 a of the flange portion 28 is formed obliquely so as to be in close contact with the side surface 9 a of the fitting portion 9.
- the right side surface 28 b of the flange portion 28 is formed obliquely so as to be in close contact with the side surface 9 b of the fitting portion 9.
- the opposing side surfaces 28e of the flange portion 28 are formed obliquely so as to be in close contact with the corresponding side surface 9e.
- a biasing means 11 (11a, 11b) for biasing the circuit module 7 and the optical ferrule 8 is provided on the surface of the lid portion 14 facing the module main body 2.
- These urging means 11 are elastic plate members made of, for example, an elastomer material.
- the urging means 11 is provided at two locations on the rotation base end side and the rotation distal end side of the lid portion 14 so as to protrude toward the storage portion 13 side.
- the protruding amount (thickness) of the urging means 11a on the rotating distal end side is formed larger than the protruding amount of the urging means 11b on the rotating proximal end side.
- the module body 2 in a state where the optical ferrule 8 is dropped into the fitting portion 9 is stored in the storage portion 13. Thereafter, when the lid portion 14 is closed, the urging means 11 a continues to be urged after first contacting the optical ferrule 8, and the urging means 11 b also comes into contact with the optical connecting portion 4. Then, the main body module 2 is pressed against the bottom surface of the storage portion 13 by the urging means 11 a and the urging means 11 b. As a result, the optical ferrule 8 is pressed into contact with the bottom surface 9c of the fitting portion 9, and both are fitted, and the optical fiber 21 and the optical element 6 are optically coupled. That is, when the lid portion 14 is closed, the optical ferrule 8 is pressed by the urging means 11 and fitted in contact with the bottom surface 9c of the fitting portion 9, and the optical ferrule 8 and the optical element 6 are positioned.
- the optical ferrule 38 is formed in a U shape by providing a concave portion 37 in the center of the front end surface, and the concave portion 37 is engaged with the convex portion 33.
- the opposing side surfaces 37a and 37b of the recess 37 and the side surface 37d adjacent to these side surfaces 37a and 37b are formed obliquely.
- the side surfaces 37a, 37b, 37d and the lower surface of the optical ferrule 38 form an obtuse angle.
- the side surfaces 37a and 37b are formed obliquely so that the side surfaces 39a and 39b of the fitting portion 39 are finally in close contact with each other.
- the side surfaces 45 a 1, 45 a 2, 45 b 1, 45 b 2 are formed obliquely and form an obtuse angle with the bottom surface 45 c of the fitting portion 45.
- the side surfaces 47a1, 47a2, 47b1, 47b2 of the optical ferrule 47 are also formed obliquely in accordance with the inclination of the side surfaces 45a1, 45a2, 45b1, 45b2 so as to correspond to the angle.
- the rear side surface 45d of the fitting portion 45 is also formed obliquely in accordance with the front end surface 47a of the optical ferrule 47 formed obliquely, and the two finally come into close contact with each other.
- the shape of the lid is not limited to the single-open type.
- the socket 60 shown in FIGS. 7 a, 7 b, and 7 c is an example of a type in which a lid 62 is covered from the upper side of the storage portion 63.
- a cross-sectional view taken along the line AA of FIG. 7a is shown in FIG. 7d.
- a projection-shaped urging means 61 is provided inside the lid portion 62.
- the urging means 61 is formed so as to increase in thickness from the left end side in the figure toward the right end side in the figure (a larger amount of protrusion).
- the formation mode of the urging means is not particularly limited, and a plurality of urging means 11 may be provided as in the above embodiment, or one urging means may be provided as in the example shown in FIG. A biasing means 61 may be provided.
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- Optical Couplings Of Light Guides (AREA)
Abstract
A module main body (2) is housed in a housing section (13) of a socket (12). The module main body (2) is composed of a circuit module (7) wherein an electric circuit section (3) and an optical connecting section (4) provided with an optical element (6) are arranged on a substrate (5), and an optical ferrule (8) which fits in the optical connecting section (4). The optical connecting section (4) is provided with a fitting section (9) having an opened upper surface. Reference surfaces of the fitting section (9) for aligning the optical ferrule (8) with the optical element (6) are side surfaces (9a, 9b, 9e) and a far end surface (9d) in the substrate surface direction, and a bottom surface (9c) in the direction perpendicular to a substrate (5). On a surface facing the module main body (2) of a cover section (14), a pressing means (11) which presses the circuit module (7) and the optical ferrule (8) is arranged. By closing the cover section (14) in a state where the module main body (2) having the optical ferrule (8) placed in the fitting section (9) is housed in the housing section (13), the optical ferrule (8) is pressed to the bottom surface of the fitting section (9) to be fitted in a state where the optical ferrule abuts on the bottom surface (9c), and the optical ferrule (8) and the optical element (6) are aligned with each other.
Description
本発明は、光通信等に用いられる光伝送モジュールに関するものである。
The present invention relates to an optical transmission module used for optical communication or the like.
図8には、従来提案されている光伝送モジュールの一例が、模式的な断面図により示されている(特許文献1、参照。)。この光伝送モジュール51は、光プラグ50、テープファイバ52、透明基板40、光素子42、電子回路44、配線網46、光接続部48、レンズ20,54、反射部22を有して構成されている。光接続部48は、ガラスやプラスチック等の透明部材により形成されている。光接続部48の端面は、例えば斜め45度に切断されており、この切断によって反射部22が形成されている。
FIG. 8 is a schematic cross-sectional view showing an example of a conventionally proposed optical transmission module (see Patent Document 1). The optical transmission module 51 includes an optical plug 50, a tape fiber 52, a transparent substrate 40, an optical element 42, an electronic circuit 44, a wiring network 46, an optical connection unit 48, lenses 20 and 54, and a reflection unit 22. ing. The optical connecting portion 48 is formed of a transparent member such as glass or plastic. The end face of the optical connecting portion 48 is cut at an angle of 45 degrees, for example, and the reflecting portion 22 is formed by this cutting.
透明基板40の表面側に、光プラグ50が配置されている。光プラグ50の一端側には、テープファイバ52が接続されている。光プラグ50の他端側には、光接続部48が設けられている。一方、透明基板40の裏面側には、電子回路44と光素子42が配置されている。電子回路44と光素子42とは、配線網46を介して互いに電気的に接続されている。また、光素子42は、発光面または受光面を有し、これらの面が、透明基板40の裏面と対向する態様で配置されている。
An optical plug 50 is disposed on the surface side of the transparent substrate 40. A tape fiber 52 is connected to one end side of the optical plug 50. An optical connection portion 48 is provided on the other end side of the optical plug 50. On the other hand, an electronic circuit 44 and an optical element 42 are disposed on the back side of the transparent substrate 40. The electronic circuit 44 and the optical element 42 are electrically connected to each other via a wiring network 46. Further, the optical element 42 has a light emitting surface or a light receiving surface, and these surfaces are arranged in a manner facing the back surface of the transparent substrate 40.
この光伝送モジュール51において、例えば、光素子42が発光面を有する面発光レーザの場合は、光素子42から発するレーザ光が、透明基板40を通り、レンズ20を通って平行光となって光接続部48に入射する。この光は、反射部22で反射し、レンズ54を介して集光されて、テープファイバ52に入射する。なお、光素子42が受光面を有する場合は、テープファイバ52から出射した光が、前記レーザ光の経路と逆の経路を通して光素子42に受光される。
In the optical transmission module 51, for example, when the optical element 42 is a surface emitting laser having a light emitting surface, the laser light emitted from the optical element 42 passes through the transparent substrate 40, passes through the lens 20, and becomes parallel light. The light enters the connection portion 48. This light is reflected by the reflecting portion 22, collected through the lens 54, and enters the tape fiber 52. When the optical element 42 has a light receiving surface, the light emitted from the tape fiber 52 is received by the optical element 42 through a path opposite to the laser light path.
図8に示したような光伝送モジュール51は、光接続部48と光プラグ50側のそれぞれに一体に設けられた2枚のレンズ20,54を有している。そして、レンズ20を透過した信号光は、反射部22に設けられた反射面によって反射する。そのため、この光伝送モジュール51においては、反射による損失が生じる。また、レンズ20,54、反射部22の配置精度を高くしないと、光素子42とテープファイバ52との光結合を良好に行うことができない。そのため、光伝送モジュール51は、その製造が容易でない、といった問題があった。
The optical transmission module 51 as shown in FIG. 8 has two lenses 20 and 54 integrally provided on the optical connection portion 48 and the optical plug 50 side. Then, the signal light transmitted through the lens 20 is reflected by the reflecting surface provided in the reflecting portion 22. Therefore, in this optical transmission module 51, loss due to reflection occurs. In addition, unless the placement accuracy of the lenses 20 and 54 and the reflection portion 22 is increased, optical coupling between the optical element 42 and the tape fiber 52 cannot be performed satisfactorily. Therefore, the optical transmission module 51 has a problem that it is not easy to manufacture.
さらに、光伝送モジュール51は、透明基板40の裏面側に、光素子42と電気回路44を設けているために、嵩高になり、また、取り扱いに注意を要するといった問題もあった。
Furthermore, since the optical transmission module 51 is provided with the optical element 42 and the electric circuit 44 on the back surface side of the transparent substrate 40, the optical transmission module 51 has a problem that it is bulky and requires careful handling.
上記したような問題点を解決するために、本発明は、次に示す構成を有して構成されている。すなわち、本発明は、
基板の上面に形成された電気回路部と、該電気回路部に電気接続された光素子を備えて前記基板の上面に設けられた光接続部と、を備えた回路モジュールと、前記光素子に光接続される光伝送路の一端側が固定され、前記光接続部に嵌合する光フェルールと、からなるモジュール本体と、該モジュール本体を収納する収納部と、該収納部に収納された前記回路モジュールを覆う蓋部と、からなるソケットと、を有する光伝送モジュールであって、
前記光フェルールを前記光接続部に嵌合して前記光素子と前記光伝送路とを光結合するために前記光接続部の上面に開口する嵌合部を設け、該嵌合部の側面を、前記光フェルールを前記光素子に対して前記基板の面内方向に位置合わせするための基準面とし、また、前記嵌合部の底面を、前記光フェルールを前記光素子に対して前記基板の垂直方向に位置合わせするための基準面とすると共に、
前記蓋部の前記モジュール本体に対向する面に前記回路モジュールおよび前記光フェルールを付勢する付勢手段を設け、前記嵌合部に前記光フェルールを載置した状態の前記モジュール本体を前記収納部に収納した状態で前記蓋部を閉じることによって前記光フェルールを前記嵌合部の底面方向に付勢して底面と当接した状態に嵌合し、前記光フェルールと前記光素子とを位置合わせしたことを特徴とする。 In order to solve the problems as described above, the present invention has the following configuration. That is, the present invention
A circuit module comprising: an electric circuit portion formed on an upper surface of the substrate; and an optical connection portion provided on the upper surface of the substrate with an optical element electrically connected to the electric circuit portion; and One end side of an optical transmission path to be optically connected is fixed, and an optical ferrule that fits into the optical connection portion, a module main body, a storage portion that stores the module main body, and the circuit that is stored in the storage portion A light transmission module having a lid that covers the module, and a socket comprising:
In order to fit the optical ferrule to the optical connecting portion and optically couple the optical element and the optical transmission path, a fitting portion that opens on the upper surface of the optical connecting portion is provided, and a side surface of the fitting portion is provided. The optical ferrule serves as a reference surface for aligning the optical element with the optical element in the in-plane direction of the substrate, and the bottom surface of the fitting portion is formed on the optical ferrule with respect to the optical element. A reference surface for vertical alignment,
An energizing means for energizing the circuit module and the optical ferrule is provided on a surface of the lid that faces the module main body, and the module main body in a state where the optical ferrule is placed on the fitting portion. The optical ferrule is urged toward the bottom surface of the fitting portion by closing the lid portion in a state of being housed in the fitting portion so as to be in contact with the bottom surface, and the optical ferrule and the optical element are aligned. It is characterized by that.
基板の上面に形成された電気回路部と、該電気回路部に電気接続された光素子を備えて前記基板の上面に設けられた光接続部と、を備えた回路モジュールと、前記光素子に光接続される光伝送路の一端側が固定され、前記光接続部に嵌合する光フェルールと、からなるモジュール本体と、該モジュール本体を収納する収納部と、該収納部に収納された前記回路モジュールを覆う蓋部と、からなるソケットと、を有する光伝送モジュールであって、
前記光フェルールを前記光接続部に嵌合して前記光素子と前記光伝送路とを光結合するために前記光接続部の上面に開口する嵌合部を設け、該嵌合部の側面を、前記光フェルールを前記光素子に対して前記基板の面内方向に位置合わせするための基準面とし、また、前記嵌合部の底面を、前記光フェルールを前記光素子に対して前記基板の垂直方向に位置合わせするための基準面とすると共に、
前記蓋部の前記モジュール本体に対向する面に前記回路モジュールおよび前記光フェルールを付勢する付勢手段を設け、前記嵌合部に前記光フェルールを載置した状態の前記モジュール本体を前記収納部に収納した状態で前記蓋部を閉じることによって前記光フェルールを前記嵌合部の底面方向に付勢して底面と当接した状態に嵌合し、前記光フェルールと前記光素子とを位置合わせしたことを特徴とする。 In order to solve the problems as described above, the present invention has the following configuration. That is, the present invention
A circuit module comprising: an electric circuit portion formed on an upper surface of the substrate; and an optical connection portion provided on the upper surface of the substrate with an optical element electrically connected to the electric circuit portion; and One end side of an optical transmission path to be optically connected is fixed, and an optical ferrule that fits into the optical connection portion, a module main body, a storage portion that stores the module main body, and the circuit that is stored in the storage portion A light transmission module having a lid that covers the module, and a socket comprising:
In order to fit the optical ferrule to the optical connecting portion and optically couple the optical element and the optical transmission path, a fitting portion that opens on the upper surface of the optical connecting portion is provided, and a side surface of the fitting portion is provided. The optical ferrule serves as a reference surface for aligning the optical element with the optical element in the in-plane direction of the substrate, and the bottom surface of the fitting portion is formed on the optical ferrule with respect to the optical element. A reference surface for vertical alignment,
An energizing means for energizing the circuit module and the optical ferrule is provided on a surface of the lid that faces the module main body, and the module main body in a state where the optical ferrule is placed on the fitting portion. The optical ferrule is urged toward the bottom surface of the fitting portion by closing the lid portion in a state of being housed in the fitting portion so as to be in contact with the bottom surface, and the optical ferrule and the optical element are aligned. It is characterized by that.
本発明の光伝送モジュールは、ソケットの収納部内にモジュール本体を収納して形成されている。そのモジュール本体は、回路モジュールを構成する光接続部の嵌合部に、光伝送路の一端側を固定した光フェルールを簡単に嵌合できる構成と成している。なお、嵌合部は、光接続部の上面が少なくとも開口するように形成されている。また、回路モジュールは、電気回路部と、光素子を備えた光接続部とを、同一基板の表面側に形成して成るものである。光素子は、光の受光と発光の少なくとも一方の機能を有し、嵌合部に嵌合した光フェルールの光伝送路と光結合するように配置されている。
The optical transmission module of the present invention is formed by housing the module body in the socket housing. The module main body is configured such that an optical ferrule having one end of the optical transmission line fixed thereto can be easily fitted into the fitting portion of the optical connection portion constituting the circuit module. In addition, the fitting part is formed so that the upper surface of the optical connection part is opened at least. Further, the circuit module is formed by forming an electric circuit portion and an optical connection portion including an optical element on the surface side of the same substrate. The optical element has at least one function of light reception and light emission, and is disposed so as to be optically coupled to the optical transmission line of the optical ferrule fitted in the fitting portion.
そのため、回路モジュールと光フェルールとを嵌合したモジュール本体を低背化できる。そして、結果的に、光伝送モジュールが嵩高になることを防止し、低背化できる。また、本発明の光伝送モジュールは、従来設けていた2つのレンズが不要となるので、構成を簡素化できる。
Therefore, the module body in which the circuit module and the optical ferrule are fitted can be lowered. As a result, the optical transmission module can be prevented from becoming bulky, and the height can be reduced. In addition, the optical transmission module of the present invention does not require the two lenses conventionally provided, and thus the configuration can be simplified.
さらに、本発明の光伝送モジュールでは、光フェルールを嵌合部に嵌合して光素子と光伝送路を光結合する際に、嵌合部の側面を基板面内(水平方向)に位置合わせをする基準面と成している。また、光フェルールと光素子とを光結合する際に、嵌合部の底面を基板に対して垂直方向の位置合わせする基準面と成している。そして、ソケットの収納部を覆う蓋部のモジュール本体に対向する面には、回路モジュールと光フェルールを付勢する付勢手段が設けられている。したがって、光フェルールを嵌合部に落とし込んだ状態のモジュール本体をソケットの収納部に入れて蓋部を閉じると、付勢手段によって、光フェルールが嵌合部の底面に圧接されて密着し、基板に対して水平方向および垂直方向に位置決めされて光素子と光結合する。
Further, in the optical transmission module of the present invention, when the optical ferrule is fitted into the fitting portion and the optical element and the optical transmission path are optically coupled, the side surface of the fitting portion is aligned in the substrate plane (horizontal direction). This is the reference plane to be used. In addition, when the optical ferrule and the optical element are optically coupled, the bottom surface of the fitting portion serves as a reference surface that is aligned in the direction perpendicular to the substrate. An energizing means for energizing the circuit module and the optical ferrule is provided on a surface of the lid portion that covers the socket accommodating portion, which faces the module main body. Therefore, when the module main body with the optical ferrule dropped into the fitting portion is put into the socket housing portion and the lid portion is closed, the optical ferrule is pressed against and closely adhered to the bottom surface of the fitting portion by the biasing means. Are optically coupled to the optical element by being positioned in the horizontal and vertical directions.
このように、本発明の光伝送モジュールは、光フェルールと嵌合部との嵌合により、容易に、かつ、正確に、光素子と光フェルールが光結合したモジュール本体を形成できると同時に、このモジュール本体をソケット内に収納できる。そして、ソケット内にモジュール本体を収納した状態とすることにより、持ち運び等の作業も行いやすく、取り扱いが容易となる。また、ソケットの収納部に設けた接続端子を介して、マザーボード(母基板)に直接実装することができる。
As described above, the optical transmission module of the present invention can easily and accurately form a module body in which the optical element and the optical ferrule are optically coupled by fitting the optical ferrule and the fitting portion. The module body can be stored in the socket. Then, by setting the module main body in the socket, it is easy to carry around and the handling becomes easy. Further, it can be directly mounted on a mother board (mother board) via a connection terminal provided in the socket housing.
さらに、本発明の光伝送モジュールでは、蓋部に設けた係止部と、収納部に設けた軸部とを枢支し、蓋部を片開き式に回動する構造とするとともに、蓋部の、モジュール本体と対向する面に設けた付勢手段は、蓋部の回動基端側に比べて回動先端側の突き出し量を大きく形成した。また、蓋部の回動基端側と対向させて、光接続部を、蓋部の回動先端側と対向させて光フェルールを配置するようにモジュール本体を収納部に収納する。したがって、蓋部を閉じると、付勢手段の回動先端側が光フェルールと最初に当接して押圧し、その後、付勢手段の回動基端側と共に、モジュール本体を押圧し、光フェルールを嵌合部の底面に密着させる。したがって、光伝送モジュールの組み立てが非常に容易、かつ、正確にできる。
Furthermore, in the optical transmission module of the present invention, the locking portion provided in the lid portion and the shaft portion provided in the storage portion are pivotally supported, and the lid portion is pivoted in a single-opening manner. The biasing means provided on the surface facing the module main body has a larger protruding amount on the rotating distal end side than on the rotating proximal end side of the lid portion. Further, the module main body is housed in the housing portion so that the optical ferrule is disposed so that the optical connection portion faces the rotation distal end side of the lid portion so as to face the rotation proximal end side of the lid portion. Therefore, when the lid is closed, the rotation tip side of the urging means first contacts and presses the optical ferrule, and then the module main body is pressed together with the rotation base end side of the urging means to fit the optical ferrule. Adhere to the bottom of the joint. Therefore, the optical transmission module can be assembled very easily and accurately.
1 光伝送モジュール
2 モジュール本体
3 電気回路部
4 光接続部
5 基板
6 光素子
7 回路モジュール
8,38,47 光フェルール
9 嵌合部
10 サブマウント
12 ソケット
13 収納部
14 蓋部
15 電気端子 DESCRIPTION OFSYMBOLS 1 Optical transmission module 2 Module main body 3 Electric circuit part 4 Optical connection part 5 Board | substrate 6 Optical element 7 Circuit module 8,38,47 Optical ferrule 9 Fitting part 10 Submount 12 Socket 13 Storage part 14 Cover part 15 Electrical terminal
2 モジュール本体
3 電気回路部
4 光接続部
5 基板
6 光素子
7 回路モジュール
8,38,47 光フェルール
9 嵌合部
10 サブマウント
12 ソケット
13 収納部
14 蓋部
15 電気端子 DESCRIPTION OF
以下に、本発明に係る実施例を図面に基づき説明する。
Embodiments according to the present invention will be described below with reference to the drawings.
図la、図1b、図1c、図2a、図2bを用いて、本発明に係る光伝送モジュールの一実施例を説明する。光伝送モジュール1は、図laに示すモジュール本体2と、図lbに示すソケット12とから組み立てられ、図lcに光伝送モジュール1の模式的な斜視図を示す。なお、図2bは、図lcの斜視図におけるA-A線により切断した場合の模式的な断面図である。
An embodiment of the optical transmission module according to the present invention will be described with reference to FIGS. La, 1b, 1c, 2a, and 2b. The light transmission module 1 is assembled from the module main body 2 shown in FIG. 1a and the socket 12 shown in FIG. 1b. FIG. 1c shows a schematic perspective view of the light transmission module 1. FIG. 2b is a schematic cross-sectional view taken along the line AA in the perspective view of FIG. Lc.
本実施例の光伝送モジュール1は、モジュール本体2を、ソケット12の収納部13内に収納して形成されるものである。ソケット12は、収納部13と、その蓋部14とからなり、図4に、その分解斜視図を示す。なお、ソケット12は、例えば金属や樹脂により形成される。
The optical transmission module 1 of the present embodiment is formed by housing the module body 2 in the housing portion 13 of the socket 12. The socket 12 includes a storage portion 13 and a lid portion 14, and FIG. 4 shows an exploded perspective view thereof. Note that the socket 12 is made of, for example, metal or resin.
蓋部14は、収納部13の上部側に設けられており、収納部13内に収納されたモジュール本体2を覆う。蓋部14は、該蓋部14に設けた係止部30と収納部13に設けた軸部29とを枢支することによって片開き式に回動する構造となしている。また、蓋部14には、その回動先端部に爪部31が設けられる。爪部31は、収納部13に設けた爪係止部32に係止する。
The lid portion 14 is provided on the upper side of the storage portion 13 and covers the module main body 2 stored in the storage portion 13. The lid portion 14 is configured to rotate in a single-opening manner by pivotally supporting a locking portion 30 provided on the lid portion 14 and a shaft portion 29 provided on the storage portion 13. In addition, the lid portion 14 is provided with a claw portion 31 at the rotation tip portion thereof. The claw portion 31 is engaged with a claw engagement portion 32 provided in the storage portion 13.
図1bに示すように、収納部13の内壁には、光伝送モジュール1をマザーボードに実装する際に用いる電気端子15が植設されている。この例では、電気端子15は、収納部13の底面端縁に沿って、互いに間隔を介して複数設けられている。また、図2a、図2bに示すように、収納部13の下面には、電気端子15の先端部である、マザーホードと接続するためのバネ性を有する端子25が突出している。
As shown in FIG. 1b, electrical terminals 15 used when the optical transmission module 1 is mounted on a mother board are planted on the inner wall of the storage unit 13. In this example, a plurality of electrical terminals 15 are provided along the bottom edge of the storage portion 13 with a space therebetween. Further, as shown in FIGS. 2 a and 2 b, a terminal 25 having a spring property for connecting to the mother hood, which is a tip portion of the electrical terminal 15, protrudes from the lower surface of the storage portion 13.
図2bに示すように、モジュール本体2を構成する回路モジュール7の基板5の裏面側が、ソケット12の収納部13の底面と密着する態様と成している。基板5の裏面側には、接続用パッド(図示せず)が設けられている。この接続用パッドが収納部13の前記電気端子15に接続され、それにより、前記電気回路部3が、電気端子15に電気的に接続される。
2b, the back surface side of the substrate 5 of the circuit module 7 constituting the module body 2 is in close contact with the bottom surface of the storage portion 13 of the socket 12. A connection pad (not shown) is provided on the back side of the substrate 5. This connection pad is connected to the electrical terminal 15 of the storage unit 13, whereby the electrical circuit unit 3 is electrically connected to the electrical terminal 15.
モジュール本体2は、図3bに示すように、回路モジュール7と、光フェルール8とを接続して形成されている。回路モジュール7は、図3aに示すように、電気回路部3と、光接続部4とを、同一の基板5の表面側に形成して成る。電気回路部3は、例えば、ICチップ18や受動部品16等の電子部品で構成される。ICチップ18は、送信ICまたは受信ICであり、受動部品16は、コンデンサ、抵抗器、コイル等である。これらの電子部品は、絶縁性樹脂をモールドして形成されたカバー部材24により覆われている。
The module body 2 is formed by connecting a circuit module 7 and an optical ferrule 8 as shown in FIG. 3b. As shown in FIG. 3 a, the circuit module 7 is formed by forming the electric circuit portion 3 and the optical connection portion 4 on the surface side of the same substrate 5. The electric circuit unit 3 is composed of electronic components such as an IC chip 18 and a passive component 16, for example. The IC chip 18 is a transmission IC or a reception IC, and the passive component 16 is a capacitor, a resistor, a coil, or the like. These electronic components are covered with a cover member 24 formed by molding an insulating resin.
光接続部4は、セラミックや樹脂で形成されたサブマウント10と、このサブマウント10に隣接して形成されたフェルール固定部19とから構成される。また、図2a、図2bおよび、図3cに示すように、光接続部4には、電気回路部3に電気接続される光素子6が設けられている。光素子6は、図1a、図3a、図3bには図示されていない。なお、光素子6は、光フェルール8の先端面8aと対向するサブマウント10の壁面に取り付けられて、フェルール固定部19を形成する透明樹脂中に埋設されている。
The optical connection portion 4 includes a submount 10 made of ceramic or resin, and a ferrule fixing portion 19 formed adjacent to the submount 10. Further, as shown in FIGS. 2 a, 2 b, and 3 c, the optical connection unit 4 is provided with an optical element 6 that is electrically connected to the electrical circuit unit 3. The optical element 6 is not shown in FIGS. 1a, 3a, 3b. The optical element 6 is attached to the wall surface of the submount 10 facing the front end surface 8 a of the optical ferrule 8 and is embedded in a transparent resin that forms the ferrule fixing portion 19.
光素子6は、光の受光と発光の少なくとも一方の機能を有している。図3cに示すように、光素子6の機能面(光の受光面または発光面)23が光フェルール8の先端面8aと光結合するように、嵌合部9側に向けて配置されている。なお、光素子6の例として、面発光レーザ等の発光素子や、フォトダイオード等の受光素子があげられる。
The optical element 6 has at least one function of light reception and light emission. As shown in FIG. 3 c, the functional surface (light receiving surface or light emitting surface) 23 of the optical element 6 is arranged toward the fitting portion 9 side so as to be optically coupled to the tip surface 8 a of the optical ferrule 8. . Examples of the optical element 6 include a light emitting element such as a surface emitting laser and a light receiving element such as a photodiode.
フェルール固定部19を形成する透明樹脂は、例えば、屈折率が1.4から1.6の範囲内に形成されている。この屈折率の値は、光ファイバのコアの屈折率の値とほぼ同じ値である。光ファイバ21は、フェルール固定部19の透明性樹脂を介して、光素子6に光接続されるものである。前記のように、透明性樹脂の屈折率と光ファイバ21の屈折率とを同じ値とすることにより、透明性樹脂と光ファイバ21との接続面における反射を低減できる。
The transparent resin forming the ferrule fixing part 19 is formed, for example, within a range of refractive index of 1.4 to 1.6. This refractive index value is almost the same as the refractive index value of the core of the optical fiber. The optical fiber 21 is optically connected to the optical element 6 through the transparent resin of the ferrule fixing part 19. As described above, by setting the refractive index of the transparent resin and the refractive index of the optical fiber 21 to the same value, reflection at the connection surface between the transparent resin and the optical fiber 21 can be reduced.
なお、フェルール固定部19は、必ずしも透明性樹脂によって全部形成されるとは限らない。少なくとも、光素子6から発する光や光素子6により受光される光が通る部分(例えば図3cのSに示されるような領域)が、透明の(光透過性を有する)ものであればよい。
In addition, the ferrule fixing | fixed part 19 is not necessarily formed entirely with transparent resin. It is sufficient that at least a portion through which light emitted from the optical element 6 and light received by the optical element 6 pass (for example, a region as indicated by S in FIG. 3c) is transparent (has light transmittance).
フェルール固定部19には、上面が開口し、その開口形状が十字形の嵌合部9が形成されている。嵌合部9には、光フェルール8を光素子6と光結合させるための、基板5の面内方向(水平方向)に位置合わせをする基準面が形成されている。この基準面は、嵌合部9の内壁の側面9a,9bおよび、これらの面と隣り合う側面9eならびに、嵌合部9の奥側面9dである。側面9aと側面9bが水平面内の横方向の基準面となる。側面9eと奥側面9dとは、水平面内の縦方向の基準面となる。さらに、嵌合部9の底面(嵌合底面)9cは、光素子6と光フェルール8を光結合させるための、基板5に対して垂直方向に位置あわせする基準面と成している。側面9a,9b,9eは、それぞれ斜めに形成され、基板5の表面と鈍角をなす。また、奥側面9dは、光フェルール8の先端面8aと対向するため、光の反射を抑制するためだけではなく、水平方向の基準面として利用するため、斜めに形成されて、基板5の表面と鈍角をなす。
The ferrule fixing part 19 is formed with a fitting part 9 having an open top surface and a cross-shaped opening. The fitting portion 9 is formed with a reference surface for alignment in the in-plane direction (horizontal direction) of the substrate 5 for optically coupling the optical ferrule 8 to the optical element 6. The reference surfaces are the side surfaces 9 a and 9 b of the inner wall of the fitting portion 9, the side surface 9 e adjacent to these surfaces, and the back side surface 9 d of the fitting portion 9. The side surface 9a and the side surface 9b serve as a horizontal reference surface in the horizontal plane. The side surface 9e and the back side surface 9d serve as a vertical reference surface in a horizontal plane. Furthermore, the bottom surface (fitting bottom surface) 9 c of the fitting portion 9 is a reference surface that is aligned in the vertical direction with respect to the substrate 5 for optically coupling the optical element 6 and the optical ferrule 8. The side surfaces 9a, 9b, 9e are formed obliquely and form an obtuse angle with the surface of the substrate 5. Further, the back side surface 9d faces the front end surface 8a of the optical ferrule 8, so that it is not only used for suppressing light reflection but also used as a horizontal reference surface. And obtuse.
光フェルール8の先端面8aは、奥側面9dの角度に合わせ、両者が密着して嵌合するように、また、光の反射を抑制するように、斜めに形成される。光フェルール8の先端面8aと下面とは、通常、約93度から98度程度の鈍角をなし、光フェルール8の先端面8aと基板5の表面は鋭角をなす。(図2b、参照)。光フェルール8には、光伝送路としての光ファイバ21の一端側が固定され、光フェルール8の先端面8aと前記光接続部4とが光結合している。
The front end surface 8a of the optical ferrule 8 is formed obliquely so as to fit in close contact with each other according to the angle of the back side surface 9d and to suppress reflection of light. The front end surface 8a and the lower surface of the optical ferrule 8 usually form an obtuse angle of about 93 to 98 degrees, and the front end surface 8a of the optical ferrule 8 and the surface of the substrate 5 form an acute angle. (See FIG. 2b). One end side of an optical fiber 21 as an optical transmission path is fixed to the optical ferrule 8, and the distal end surface 8 a of the optical ferrule 8 and the optical connection portion 4 are optically coupled.
光フェルール8は、水平方向に張り出した鍔部28を有しており、鍔部28の側面28a,28bと鍔部28の下面とは鈍角を成す。鍔部28の左側の側面28aは、嵌合部9の側面9aに密着するように斜めに形成されている。鍔部28の右側の側面28bは、嵌合部9の側面9bに密着するように斜めに形成されている。また、鍔部28の対向する側面28eは、それぞれ、対応する側面9eに密着するように斜めに形成されている。
The optical ferrule 8 has a flange portion 28 protruding in the horizontal direction, and the side surfaces 28a and 28b of the flange portion 28 and the lower surface of the flange portion 28 form an obtuse angle. The left side surface 28 a of the flange portion 28 is formed obliquely so as to be in close contact with the side surface 9 a of the fitting portion 9. The right side surface 28 b of the flange portion 28 is formed obliquely so as to be in close contact with the side surface 9 b of the fitting portion 9. Further, the opposing side surfaces 28e of the flange portion 28 are formed obliquely so as to be in close contact with the corresponding side surface 9e.
図2a、図2bに示すように、蓋部14の回動基端側と対向させて、回路モジュール7の光接続部4が配置され、また、蓋部14の回動先端側と対向させて、光フェルール8が配置されるように、モジュール本体2が収納部13に収納される。収納部13には、光フェルール8の光ファイバ21が挿入された側面8fと対向する位置に、光ファイバ21を引き出すための切り欠き41が設けられている。
2a and 2b, the optical connection portion 4 of the circuit module 7 is disposed so as to be opposed to the rotation base end side of the lid portion 14, and is also opposed to the rotation distal end side of the lid portion 14. The module main body 2 is accommodated in the accommodating portion 13 so that the optical ferrule 8 is disposed. The storage portion 13 is provided with a notch 41 for pulling out the optical fiber 21 at a position facing the side surface 8f into which the optical fiber 21 of the optical ferrule 8 is inserted.
蓋部14のモジュール本体2に対向する面には、回路モジュール7と光フェルール8を付勢する付勢手段11(11a,11b)が設けられている。これらの付勢手段11は、例えばエラストマー材料により形成された弾性を有する板部材である。付勢手段11は、蓋部14の回動基端側と回動先端側の2カ所に、収納部13側に突き出して設けられている。回動先端側の付勢手段11aの突き出し量(厚み)は、回動基端側の付勢手段11bの突き出し量よりも大きく形成されている。
A biasing means 11 (11a, 11b) for biasing the circuit module 7 and the optical ferrule 8 is provided on the surface of the lid portion 14 facing the module main body 2. These urging means 11 are elastic plate members made of, for example, an elastomer material. The urging means 11 is provided at two locations on the rotation base end side and the rotation distal end side of the lid portion 14 so as to protrude toward the storage portion 13 side. The protruding amount (thickness) of the urging means 11a on the rotating distal end side is formed larger than the protruding amount of the urging means 11b on the rotating proximal end side.
光フェルール8を嵌合部9に落とし込んだ状態のモジュール本体2を収納部13に収める。その後、蓋部14を閉じると、付勢手段11aが最初に光フェルール8に当接した後に付勢し続けるとともに、付勢手段11bも光接続部4に当接する。そして、付勢手段11aと付勢手段11bとで、本体モジュール2を収納部13の底面に押しつける。この結果、光フェルール8は嵌合部9の底面9cに圧接されて両者が嵌合し、光ファイバ21と光素子6とが光結合する。つまり、蓋部14が閉じることにより、光フェルール8が付勢手段11によって押圧されて嵌合部9の底面9cと当接した状態で嵌合し、光フェルール8と光素子6とが位置決めされる。
The module body 2 in a state where the optical ferrule 8 is dropped into the fitting portion 9 is stored in the storage portion 13. Thereafter, when the lid portion 14 is closed, the urging means 11 a continues to be urged after first contacting the optical ferrule 8, and the urging means 11 b also comes into contact with the optical connecting portion 4. Then, the main body module 2 is pressed against the bottom surface of the storage portion 13 by the urging means 11 a and the urging means 11 b. As a result, the optical ferrule 8 is pressed into contact with the bottom surface 9c of the fitting portion 9, and both are fitted, and the optical fiber 21 and the optical element 6 are optically coupled. That is, when the lid portion 14 is closed, the optical ferrule 8 is pressed by the urging means 11 and fitted in contact with the bottom surface 9c of the fitting portion 9, and the optical ferrule 8 and the optical element 6 are positioned. The
なお、本発明は、前記実施例の形態に限定されるものではなく、様々な実施の形態を採り得る。例えば、前記実施例では、光フェルール8は、光ファイバ21の一端側を固定して形成されていたが、光導波路の一端側を固定したものでもよい。
In addition, this invention is not limited to the form of the said Example, Various embodiment can be taken. For example, in the above embodiment, the optical ferrule 8 is formed by fixing one end side of the optical fiber 21, but may be one in which one end side of the optical waveguide is fixed.
また、本発明の光伝送モジュールに設けられているモジュール本体2を構成する光接続部の嵌合部の形状と、それと嵌合する光フェルールの形状は、特に限定されるものでない。例えば、図5および図6に、嵌合部と光フェルールの他の形状を示す。
Further, the shape of the fitting portion of the optical connecting portion constituting the module main body 2 provided in the optical transmission module of the present invention and the shape of the optical ferrule to be fitted therewith are not particularly limited. For example, FIGS. 5 and 6 show other shapes of the fitting portion and the optical ferrule.
図5において、光接続部34は、光フェルール38の先端面38aと対向する光接続部34の側面の中央に凸部33を設けて形成されている。嵌合部39は、側面39a,39b,39d,39fと基板5の表面(嵌合部39の底面39c)とにより形成された空間を有している。側面39a、39b,39d,39fは、それぞれ、底面39cと鈍角をなす。この例では、嵌合部の側面39a,39b,39d,39fが、光フェルール38を光素子6に対して水平方向に位置合わせをする基準面と成している。側面39aと側面39bが水平面内の横方向の基準面となる。側面39dと側面39fが、水平面内の縦方向の基準面となる。
In FIG. 5, the optical connection portion 34 is formed by providing a convex portion 33 at the center of the side surface of the optical connection portion 34 that faces the tip surface 38 a of the optical ferrule 38. The fitting portion 39 has a space formed by the side surfaces 39a, 39b, 39d, 39f and the surface of the substrate 5 (the bottom surface 39c of the fitting portion 39). The side surfaces 39a, 39b, 39d, and 39f form an obtuse angle with the bottom surface 39c, respectively. In this example, the side surfaces 39a, 39b, 39d, and 39f of the fitting portion serve as a reference surface for aligning the optical ferrule 38 with respect to the optical element 6 in the horizontal direction. The side surface 39a and the side surface 39b serve as a horizontal reference surface in the horizontal plane. The side surface 39d and the side surface 39f are vertical reference surfaces in a horizontal plane.
光フェルール38は、先端面の中央に凹部37を設けてコ形状に形成され、この凹部37が前記凸部33と嵌合する態様と成している。凹部37の対向する側面37a,37bおよび、これらの側面37a,37bと隣り合う側面37dは斜めに形成されている。側面37a,37b,37dと光フェルール38の下面とは鈍角を成す。側面37a,37bは、嵌合部39の側面39a,39bとそれぞれが最終的に密着するように斜めに形成されている。同様に、側面37dは、嵌合部39の側面39fと密着するように斜めに形成され、両者は最終的に密着する。光フェルール38の先端面38aは、嵌合部39の側面39dと密着するように斜めに形成され、両者は最終的に密着する。
The optical ferrule 38 is formed in a U shape by providing a concave portion 37 in the center of the front end surface, and the concave portion 37 is engaged with the convex portion 33. The opposing side surfaces 37a and 37b of the recess 37 and the side surface 37d adjacent to these side surfaces 37a and 37b are formed obliquely. The side surfaces 37a, 37b, 37d and the lower surface of the optical ferrule 38 form an obtuse angle. The side surfaces 37a and 37b are formed obliquely so that the side surfaces 39a and 39b of the fitting portion 39 are finally in close contact with each other. Similarly, the side surface 37d is formed obliquely so as to be in close contact with the side surface 39f of the fitting portion 39, and both are finally in close contact. The front end surface 38a of the optical ferrule 38 is formed obliquely so as to be in close contact with the side surface 39d of the fitting portion 39, and both are finally in close contact.
また、光フェルール38の光ファイバ21が挿入された側面38fと下面とは鈍角を成すように斜めに形成される。このため、収納部13に収納した回路モジュール7に、光フェルール38を嵌合部39に上から落とし込んで嵌合する際の動作がスムースとなる。
Also, the side surface 38f where the optical fiber 21 of the optical ferrule 38 is inserted and the lower surface are formed obliquely so as to form an obtuse angle. For this reason, the operation | movement at the time of dropping the optical ferrule 38 to the fitting part 39 from the top to the circuit module 7 accommodated in the accommodating part 13 is smooth.
また、図6において、光接続部64は、断面形状が略凸字状の上面が開口した空間を有する嵌合部45に、光フェルール47を、その先端側から挿入する態様の例である。光フェルール47は、その下端側が両側に突出しており、左右の側面に段部が形成されている。光フェルール47の左側の上段の側面47a1は、嵌合部45の開口空間の上側の側面45a1に最終的に密着する。光フェルール47の左側の下段の側面47a2は、嵌合部45の開口空間の下側の側面45a2に、最終的に密着する。また、光フェルール47の右側の上段の側面47b1は、嵌合部45の開口空間の上側の側面45b1に最終的に密着する。光フェルール47の右側の下段の端面47b2は、嵌合部45の開口空間の上側の側面45b2に最終的に密着する。
Moreover, in FIG. 6, the optical connection part 64 is an example of the aspect which inserts the optical ferrule 47 from the front end side to the fitting part 45 which has the space which the upper surface of the cross-sectional shape opened substantially convex shape. The lower end side of the optical ferrule 47 protrudes on both sides, and step portions are formed on the left and right side surfaces. The upper side surface 47 a 1 on the left side of the optical ferrule 47 finally comes into close contact with the upper side surface 45 a 1 of the opening space of the fitting portion 45. The lower side surface 47a2 on the left side of the optical ferrule 47 finally comes into close contact with the lower side surface 45a2 of the opening space of the fitting portion 45. In addition, the upper side surface 47 b 1 on the right side of the optical ferrule 47 finally comes into close contact with the upper side surface 45 b 1 of the opening space of the fitting portion 45. The lower end surface 47 b 2 on the right side of the optical ferrule 47 finally comes into close contact with the upper side surface 45 b 2 of the opening space of the fitting portion 45.
なお、側面45a1,45a2,45b1,45b2は斜めに形成され、嵌合部45の底面45cとは鈍角をなす。また、その角度に対応するように、側面45a1,45a2,45b1,45b2の傾斜に合わせ、光フェルール47の側面47a1,47a2,47b1,47b2も斜めに形成されている。また、同様に、斜めに形成された光フェルール47の先端面47aに合わせて、嵌合部45の奥側面45dも斜めに形成されており、両者は最終的に密着する。この例では、嵌合部45の側面45a1,45a2,45b1,45b2と奥側面45dとが、光フェルール47を光素子6に対して水平方向に位置合わせをする基準面と成している。側面45a1,45a2,45b1,45b2が水平面内の横方向の基準面となる。奥側面45dが、水平面内の縦方向の基準面となる。
The side surfaces 45 a 1, 45 a 2, 45 b 1, 45 b 2 are formed obliquely and form an obtuse angle with the bottom surface 45 c of the fitting portion 45. Further, the side surfaces 47a1, 47a2, 47b1, 47b2 of the optical ferrule 47 are also formed obliquely in accordance with the inclination of the side surfaces 45a1, 45a2, 45b1, 45b2 so as to correspond to the angle. Similarly, the rear side surface 45d of the fitting portion 45 is also formed obliquely in accordance with the front end surface 47a of the optical ferrule 47 formed obliquely, and the two finally come into close contact with each other. In this example, the side surfaces 45 a 1, 45 a 2, 45 b 1, 45 b 2 and the back side surface 45 d of the fitting portion 45 form a reference surface for aligning the optical ferrule 47 with the optical element 6 in the horizontal direction. The side surfaces 45a1, 45a2, 45b1, and 45b2 serve as lateral reference surfaces in the horizontal plane. The back side surface 45d serves as a vertical reference surface in the horizontal plane.
また、光フェルール47の上段の側面47a1,47b1の高さL3は、嵌合部45の開口空間の上側の側面45a1,45b1の高さL4よりも大きく形成されている(L3>L4)。嵌合部45の開口空間の下側の側面45a2,45b2の高さL2は、光フェルール47の下段の側面47a2,47b2の高さL1よりも大きく形成されている(L2>L1)。このことにより、光フェルール47を嵌合部45に挿入した状態においては、光フェルール47の上面が嵌合部45の開口から上部に突出する。そして、光フェルール47の下面と嵌合部45の底面45cとが間隔を介した状態となる。次に、蓋部14を閉じると、光フェルール47が付勢手段11によって押圧されて嵌合部45の底面45cと当接した状態で嵌合し、光フェルール47と光素子6とが位置決めされる。この例のように、光フェルールの嵌合部への挿入方法は、光フェルールと嵌合部の形成態様に応じて、適宜設定される。
The height L3 of the upper side surfaces 47a1 and 47b1 of the optical ferrule 47 is formed to be greater than the height L4 of the upper side surfaces 45a1 and 45b1 of the opening space of the fitting portion 45 (L3> L4). The height L2 of the lower side surfaces 45a2 and 45b2 of the opening space of the fitting portion 45 is formed to be greater than the height L1 of the lower side surfaces 47a2 and 47b2 of the optical ferrule 47 (L2> L1). As a result, in a state where the optical ferrule 47 is inserted into the fitting portion 45, the upper surface of the optical ferrule 47 protrudes upward from the opening of the fitting portion 45. And the lower surface of the optical ferrule 47 and the bottom face 45c of the fitting part 45 will be in the state which interposed the space | interval. Next, when the lid 14 is closed, the optical ferrule 47 is pressed by the urging means 11 and fitted in contact with the bottom surface 45c of the fitting portion 45, and the optical ferrule 47 and the optical element 6 are positioned. The As in this example, the method of inserting the optical ferrule into the fitting portion is appropriately set according to the formation mode of the optical ferrule and the fitting portion.
さらに、蓋部の形状は片開きタイプに限定されるものではない。例えば図7a、図7b、図7cに示すソケット60は、収納部63の上側から蓋部62を被せるタイプの例である。図7aのA-A断面図を図7dに示す。この図に示すように、蓋部62の内側には、突起形状の付勢手段61が設けられている。付勢手段61の厚みは、図の左端側から図の右端側に向かうにつれて厚く(突出量を多く)形成されている。
Furthermore, the shape of the lid is not limited to the single-open type. For example, the socket 60 shown in FIGS. 7 a, 7 b, and 7 c is an example of a type in which a lid 62 is covered from the upper side of the storage portion 63. A cross-sectional view taken along the line AA of FIG. 7a is shown in FIG. 7d. As shown in this figure, a projection-shaped urging means 61 is provided inside the lid portion 62. The urging means 61 is formed so as to increase in thickness from the left end side in the figure toward the right end side in the figure (a larger amount of protrusion).
この例においては、図7aに示すように、蓋部62を収納部63の上側に配置する。そして、図7bに示すように、蓋部62を収納部63より右側にずらした状態で、蓋部62の対向する両端縁に設けた係止部65と、収納部63の対向する両側面に設けた軸部66とを係合する。その後、図7cに示すように、蓋部62を図の左側にスライド移動させる。そうすると、図の右側に向かうにつれて厚く形成された付勢手段61によって、収納部63に収められたモジュール本体2が収納部63の底面に押しつけられると共に、蓋部62が収納部63上に固定される。
In this example, as shown in FIG. 7A, the lid portion 62 is disposed on the upper side of the storage portion 63. Then, as shown in FIG. 7 b, with the lid portion 62 shifted to the right side from the storage portion 63, the locking portions 65 provided at the opposite end edges of the lid portion 62 and the opposite side surfaces of the storage portion 63 are arranged. The provided shaft portion 66 is engaged. Thereafter, as shown in FIG. 7c, the lid 62 is slid to the left in the figure. Then, the module body 2 housed in the housing portion 63 is pressed against the bottom surface of the housing portion 63 by the biasing means 61 formed thicker toward the right side of the figure, and the lid portion 62 is fixed on the housing portion 63. The
さらに、付勢手段の形成態様は特に限定されるものではなく、前記実施例のように、複数の付勢手段11を設けてもよいし、図7dに示した例のように、1つの付勢手段61を設けてもよい。
Furthermore, the formation mode of the urging means is not particularly limited, and a plurality of urging means 11 may be provided as in the above embodiment, or one urging means may be provided as in the example shown in FIG. A biasing means 61 may be provided.
本発明の光伝送モジュールは、簡単な構造で製造および取り扱いが容易であり、例えば低背化が要求される光通信等の用途にも適用できる。
The optical transmission module of the present invention has a simple structure and is easy to manufacture and handle. For example, the optical transmission module can be applied to applications such as optical communication that require a low profile.
Claims (2)
- 基板の上面に形成された電気回路部と、該電気回路部に電気接続された光素子を備えて前記基板の上面に設けられた光接続部と、を備えた回路モジュールと、前記光素子に光接続される光伝送路の一端側が固定され、前記光接続部に嵌合する光フェルールと、からなるモジュール本体と、該モジュール本体を収納する収納部と、該収納部に収納された前記回路モジュールを覆う蓋部と、からなるソケットと、を有する光伝送モジュールであって、
前記光フェルールを前記光接続部に嵌合して前記光素子と前記光伝送路とを光結合するために前記光接続部の上面に開口する嵌合部を設け、該嵌合部の側面を、前記光フェルールを前記光素子に対して前記基板の面内方向に位置合わせするための基準面とし、また、前記嵌合部の底面を、前記光フェルールを前記光素子に対して前記基板の垂直方向に位置合わせするための基準面とすると共に、
前記蓋部の前記モジュール本体に対向する面に前記回路モジュールおよび前記光フェルールを付勢する付勢手段を設け、前記嵌合部に前記光フェルールを載置した状態の前記モジュール本体を前記収納部に収納した状態で前記蓋部を閉じることによって前記光フェルールを前記嵌合部の底面方向に付勢して底面と当接した状態に嵌合し、前記光フェルールと前記光素子とを位置合わせしたことを特徴とする光伝送モジュール。 A circuit module comprising: an electric circuit portion formed on an upper surface of the substrate; and an optical connection portion provided on the upper surface of the substrate with an optical element electrically connected to the electric circuit portion; and One end side of an optical transmission path to be optically connected is fixed, and an optical ferrule that fits into the optical connection portion, a module main body, a storage portion that stores the module main body, and the circuit that is stored in the storage portion A light transmission module having a lid that covers the module, and a socket comprising:
In order to fit the optical ferrule to the optical connecting portion and optically couple the optical element and the optical transmission path, a fitting portion that opens on the upper surface of the optical connecting portion is provided, and a side surface of the fitting portion is provided. The optical ferrule serves as a reference surface for aligning the optical element with the optical element in the in-plane direction of the substrate, and the bottom surface of the fitting portion is formed on the optical ferrule with respect to the optical element. A reference surface for vertical alignment,
An energizing means for energizing the circuit module and the optical ferrule is provided on a surface of the lid that faces the module main body, and the module main body in a state where the optical ferrule is placed on the fitting portion. The optical ferrule is urged toward the bottom surface of the fitting portion by closing the lid portion in a state of being housed in the fitting portion so as to be in contact with the bottom surface, and the optical ferrule and the optical element are aligned. An optical transmission module characterized by that. - 蓋部は、該蓋部に設けた係止部と、収納部に設けた軸部とを枢支して片開き式に回動する構造となし、前記蓋部の回動基端側と対向させて光接続部が、また、前記蓋部の回動先端側と対向させて光フェルールが配置されるようにモジュール本体を収納部に収納すると共に、突起形状によって付勢手段を形成し、該付勢手段の突起形状の突き出し量を前記蓋部の回動基端側に比べて回動先端側を大きく形成し、前記蓋部を閉じると前記付勢手段の回動先端側が最初に前記光フェルールに当接した後に付勢し続けて、前記光フェルールを嵌合部の底面に圧接し、光伝送路と光素子とを光結合したことを特徴とする請求項1記載の光伝送モジュール。 The lid portion is structured to pivot in a single-opening manner by pivotally supporting a locking portion provided in the lid portion and a shaft portion provided in the storage portion, and opposed to the rotation proximal end side of the lid portion. The module main body is housed in the housing portion so that the optical ferrule is disposed so that the optical connection portion faces the rotation tip side of the lid portion, and the biasing means is formed by the protrusion shape, When the protrusion of the urging means has a protruding amount larger than the rotation base end side of the lid portion, the rotation tip end side of the urging means is first exposed to the light when the lid portion is closed. 2. The optical transmission module according to claim 1, wherein the optical ferrule is pressed after being in contact with the ferrule so that the optical ferrule is pressed against the bottom surface of the fitting portion and the optical transmission path and the optical element are optically coupled.
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