JPH03103806A - Light receiving module - Google Patents
Light receiving moduleInfo
- Publication number
- JPH03103806A JPH03103806A JP24086889A JP24086889A JPH03103806A JP H03103806 A JPH03103806 A JP H03103806A JP 24086889 A JP24086889 A JP 24086889A JP 24086889 A JP24086889 A JP 24086889A JP H03103806 A JPH03103806 A JP H03103806A
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- light
- ferrule
- optical fiber
- circular top
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 description 9
- 239000011148 porous material Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009429 electrical wiring Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
概要
受光素子と光ファイバを光学的に結合してなる受光モジ
ュールに関し、
受光素子と光ファイバの位置調整を行うことなしに組み
立てることができる受光モジュールの提供を目的とし、
長方形又は正方形の受光面の中央に光ファイバの外径よ
りも大きな径の受光部が形成された受光素子と、その端
部が、上記受光面が外接する大きさの円形頂面を有する
・円錐台状に形成されたフエルールとを備え、上記光フ
ァイバを、その端面が上記円形頂面と同一平面となるよ
うに上記フエルールの中心細孔に挿入固定し、上記受光
素子を、その受光面が上記円形頂面の外周に外接するよ
うに上記フェルールに密着固定して構或する。[Detailed Description of the Invention] Summary The present invention relates to a light receiving module in which a light receiving element and an optical fiber are optically coupled, and an object thereof is to provide a light receiving module that can be assembled without adjusting the position of the light receiving element and the optical fiber. A light-receiving element in which a light-receiving part with a diameter larger than the outer diameter of the optical fiber is formed in the center of a rectangular or square light-receiving surface, and the end of the light-receiving element has a circular top surface of a size that circumscribes the light-receiving surface. The optical fiber is inserted and fixed into the central hole of the ferrule so that its end surface is flush with the circular top surface, and the light-receiving element is inserted into the center hole of the ferrule so that its light-receiving surface is flush with the circular top surface. It is configured to be closely fixed to the ferrule so as to circumscribe the outer periphery of the circular top surface.
産業上の利用分野
本発明は、入射した光信号を電気信号に変換して出力す
る受光素子と光ファイバとを光学的に結合してなる受光
モジュールに関する。INDUSTRIAL APPLICATION FIELD The present invention relates to a light-receiving module that is formed by optically coupling a light-receiving element that converts an incident optical signal into an electrical signal and outputs the electrical signal, and an optical fiber.
一般的な光通信システムの受信側では、光伝送路（光フ
ァイバ〉を介して伝送されてきた光信号をフォトダイオ
ード等の受光素子により光一電気変換して電気信号を得
、この電気信号に基づいて情報再生を行うようにしてい
る。このようなシステムにおいて使用される受光モジュ
ールは、受光素子と光ファイバとを所定の位置関係で備
えて構威されている。この種の受光モジュールにあって
は、受光素子と光ファイバの位置関係が正確に調整され
ていないと受光効率が低下するので、受光モジュールを
組み立てるに際しては、受光素子及び光ファイバについ
て正確に位置決めを行う必要がある。On the receiving side of a typical optical communication system, an optical signal transmitted via an optical transmission line (optical fiber) is converted into an electrical signal using a light receiving element such as a photodiode to obtain an electrical signal. The light-receiving module used in such a system is equipped with a light-receiving element and an optical fiber in a predetermined positional relationship. If the positional relationship between the light-receiving element and the optical fiber is not adjusted accurately, the light-receiving efficiency will decrease, so when assembling the light-receiving module, it is necessary to accurately position the light-receiving element and the optical fiber.
従来の技術
第６図に従来の受光モジュールの縦断面図を示す。コバ
ール等から形成されたステム１上に例えばセラミック製
のサブマウント２が搭載されており、このサブマウント
２上にフォトダイオード等の受光素子３が実装されてい
る。４はコバール、ステンレス等の金属から形成された
キャップであり、このキャップ４はステム１に例えばプ
ロジェクション溶接されている。BACKGROUND OF THE INVENTION FIG. 6 shows a vertical cross-sectional view of a conventional light receiving module. A submount 2 made of, for example, ceramic is mounted on a stem 1 made of Kovar or the like, and a light receiving element 3 such as a photodiode is mounted on this submount 2. Reference numeral 4 denotes a cap made of metal such as Kovar or stainless steel, and this cap 4 is welded to the stem 1 by, for example, projection welding.
このように受光素子３及びキャップ４等をステム１上に
予め組立てた後、その先端にテーパ先球部が形成された
光ファイバ５を受光素子３に向かい合わせ、ファイバ先
端から光を出射させながらフェルール６とスリーブ７の
位置関係を調整して、光軸方向（Ｚ軸）の調整を行い、
さらにスリーブ７とキャップ４とを擦り合わせて光軸と
垂直な方向（Ｘ，Ｙ軸）の調整を行うことによって、最
適な光結合位置を見つけ、最後に半田付けによりスリー
ブ７とキャップ４との間及びフェルール６とスリーブ７
との間の気密封止固定を行っている。After assembling the light-receiving element 3, cap 4, etc. on the stem 1 in advance in this way, the optical fiber 5 having a tapered spherical portion formed at its tip is faced to the light-receiving element 3, and while emitting light from the fiber tip, Adjust the positional relationship between the ferrule 6 and the sleeve 7 to adjust the optical axis direction (Z-axis),
Furthermore, by rubbing the sleeve 7 and cap 4 together and adjusting the directions perpendicular to the optical axis (X, Y axes), the optimal optical coupling position is found, and finally the sleeve 7 and cap 4 are connected by soldering. between and ferrule 6 and sleeve 7
An airtight seal is secured between the
尚、８は外部接続用の端子であり、９はボンディングワ
イヤである。Note that 8 is a terminal for external connection, and 9 is a bonding wire.
と、受光素子と光ファイバの相対的な位置関係の調整を
行うためにｘ，ｙ，ｚの３軸調整が必要であり、モジュ
ールの組立てが容易でないという問題があった。However, in order to adjust the relative positional relationship between the light-receiving element and the optical fiber, three-axis adjustment of x, y, and z is required, and there is a problem that assembly of the module is not easy.
本発明はこのような点に鑑みてなされたものであり、受
光素子と光ファイバの位置調整を行うことなしに組み立
てることができる受光モジュールの提供を目的としてい
る。The present invention has been made in view of these points, and an object of the present invention is to provide a light receiving module that can be assembled without adjusting the positions of the light receiving element and the optical fiber.
課題を解決するための手段
本発明の原理を説明するための第１図を参照すると、本
発明の受光モジュールの側面図（ａ）及び正面図６）が
示されている。Means for Solving the Problems Referring to FIG. 1 for explaining the principle of the present invention, a side view (a) and a front view 6) of a light receiving module of the present invention are shown.
本発明の受光モジュールは、長方形又は正方形の受光面
１２の中央に光ファイバ１４の外径よりも大きな径の受
光部１６が形成された受光素子１８と、その端部が、受
光面１２が外接する大きさの円形頂面２０を有する円錐
台状に形戊されたフェルール２２とを備えて構或されて
いる。The light-receiving module of the present invention includes a light-receiving element 18 in which a light-receiving portion 16 having a diameter larger than the outer diameter of an optical fiber 14 is formed in the center of a rectangular or square light-receiving surface 12; The ferrule 22 is shaped like a truncated cone and has a circular top surface 20 of a size that is approximately 20 mm.
そして、光ファイバ１４を、その端面が円形頂面２０と
同一平面となるようにフェルール２２の中心細孔２４に
挿入固定し、受光素子１８を、その受光面１２が円形頂
面２０の外周に外接するようにフェルール２２に密着固
定している。Then, the optical fiber 14 is inserted and fixed into the central hole 24 of the ferrule 22 so that its end surface is flush with the circular top surface 20, and the light receiving element 18 is inserted so that its light receiving surface 12 is on the outer periphery of the circular top surface 20. It is tightly fixed to the ferrule 22 so as to circumscribe it.
作 用
上記構或の受光素子の受光面ｌ２がフエルールの円形頂
面２０の外周に外接するように、受光素子１８をフエル
ール２２に密着固定すると、受光素子の受光部１６は受
光面１２の中央に形成されており、しかも、受光部１６
の径は光ファイバ１４の外径よりも大きいので、フェル
ールの中心細孔２４に挿入固定された光ファイバ１４の
端面は、受光部１６に包含された形となり、高い受光効
率が達或される。このように、受光面１２が円形頂面２
０の外周に外接するようにしているので、従来のＸ軸方
向及びＹ軸方向の位置調整を省略することができ、また
、フェルール２２の中心細孔・２４に挿入固定された光
ファイバ１４の端面が円形頂面２０と同一平面となるよ
うにするとともに、５ー
６一
受光素子１８をフェルール２２に密着固定しているので
、従来のＺ軸方向の位置調整が不要になる。Function When the light receiving element 18 is closely fixed to the ferrule 22 so that the light receiving surface l2 of the light receiving element having the above structure circumscribes the outer periphery of the circular top surface 20 of the ferrule, the light receiving portion 16 of the light receiving element is located at the center of the light receiving surface 12. In addition, the light receiving section 16
Since the diameter of the optical fiber 14 is larger than the outer diameter of the optical fiber 14, the end face of the optical fiber 14 inserted and fixed into the central pore 24 of the ferrule is included in the light receiving part 16, and high light receiving efficiency is achieved. . In this way, the light receiving surface 12 is the circular top surface 2.
0, the conventional position adjustment in the X-axis direction and Y-axis direction can be omitted, and the optical fiber 14 inserted and fixed in the central hole 24 of the ferrule 22 can be circumscribed. Since the end surface is made to be on the same plane as the circular top surface 20 and the 5-6 light receiving element 18 is closely fixed to the ferrule 22, conventional position adjustment in the Z-axis direction is not necessary.
この場合、従来のＸ軸方向及びＹ軸方向の位置調整が不
要になるという作用は、以下の事実に基づいて生じるも
のである。In this case, the effect that the conventional position adjustment in the X-axis direction and the Y-axis direction becomes unnecessary is caused based on the following fact.
■ 一般には円柱外形を有するものとして提供されるフ
ェルール等の円柱部材についてその一部を円錐台状に加
工する技術は或熟しており、円錐台端面（円形頂面）の
中心位置と光ファイバを挿入固定すべき中心細孔との偏
心は極めて小さい。■ The technology for processing a part of a cylindrical member such as a ferrule, which is generally provided as having a cylindrical outer shape, into a truncated cone shape is well-developed, and the center position of the truncated cone end face (circular top face) and the optical fiber The eccentricity with respect to the central pore to be inserted and fixed is extremely small.
■ 光ファイバをフェルールの中心細孔に挿入固定して
、光ファイバをフェルールの外形形状の軸心位置に位置
させることは、光ファイバコネクタにおける場合と同様
にして行うことができる。(2) Inserting and fixing the optical fiber into the central hole of the ferrule and positioning the optical fiber at the axial center position of the outer shape of the ferrule can be performed in the same manner as in the case of an optical fiber connector.
■ 受光素子の受光部を長方形又は正方形の受光面の中
央に位置させることは、フォトリソグラフィー法等を用
いた半導体製造の場合と同様に行うことができる。(2) Positioning the light-receiving portion of the light-receiving element at the center of the rectangular or square light-receiving surface can be done in the same manner as in the case of semiconductor manufacturing using photolithography or the like.
尚、本発明の構或において、光ファイバの外径よりも大
きな径の受光部を受光素子の受光面上に形成しているの
は、寸法精度が十分でない部材を使用した場合或いは受
光素子をフェルールに密着固定するに際しての位置精度
が十分でない場合でも高い受光効率の確保を可能にする
ためである。In the structure of the present invention, the light-receiving portion having a diameter larger than the outer diameter of the optical fiber is formed on the light-receiving surface of the light-receiving element when a member with insufficient dimensional accuracy is used or when the light-receiving element is This is to ensure high light receiving efficiency even when the positional accuracy is not sufficient when closely fixing to the ferrule.
実 施 例 以下本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described below based on the drawings.
第２図（ａ）は本発明の実施に使用する受光素子の正面
（受光部形成面）側からの斜視図であり、同図ら）は背
面側からの斜視図である。この例では、受光素子１８は
直方体形状を有しており、受光面１２は正方形である。FIG. 2(a) is a perspective view from the front (light receiving portion forming surface) side of a light receiving element used for carrying out the present invention, and FIG. 2(a) is a perspective view from the back side. In this example, the light receiving element 18 has a rectangular parallelepiped shape, and the light receiving surface 12 is square.
受光面１２の中央部にはそこに入射した光を電気信号に
変換することができる円形の受光部１６が形戊されてお
り、その中心位置は受光面１２の対角線の交点と一致し
ている。A circular light receiving section 16 is formed in the center of the light receiving surface 12 and can convert the light incident thereon into an electrical signal, and its center position coincides with the intersection of diagonals of the light receiving surface 12. .
受光部１６の直径は、光結合すべき光ファイバのクラッ
ド径が例えば１２５μｍである場合には、それよりも大
きな例えば１５０μｍである。２６は少なくとも受光部
１６を覆うように受光面１２上に形成された保護膜であ
り、この実施例では保謹膜２６は受光面１２の全面に形
成されている。When the cladding diameter of the optical fiber to be optically coupled is, for example, 125 μm, the diameter of the light receiving portion 16 is larger, for example, 150 μm. Reference numeral 26 denotes a protective film formed on the light receiving surface 12 so as to cover at least the light receiving section 16. In this embodiment, the protection film 26 is formed on the entire surface of the light receiving surface 12.
保護膜２６は例えば窒化珪素からなり、受光部１６が保
護膜２６により覆われていることによって、受光部のパ
ッシベイションが防止される。受光面１２と反対側の受
光素子背面には、光一電気変換された電気信号を取り出
すための２つの電極２８，３０が形成されている。尚、
正方形の受光面１２の一辺の長さは例えば２ ｍｍであ
る。The protective film 26 is made of silicon nitride, for example, and by covering the light receiving section 16 with the protective film 26, passivation of the light receiving section is prevented. Two electrodes 28 and 30 are formed on the back surface of the light-receiving element opposite to the light-receiving surface 12 for extracting the electrical signal that has been photo-electrically converted. still,
The length of one side of the square light-receiving surface 12 is, for example, 2 mm.
第３図は本発明の実施に使用するフェルールの縦断面図
である。この実施例では、２点鎖線Ａで示すような概略
円柱外形を有する光ファイバコネクタ用のフェルールの
端部について研削加工を施すことによって円錐台状に形
戊して、円形頂面２０を有するフェルール２２を作或し
ている。このような高精度な加工技術によりフエルール
の外形を加工した場合には、中心細孔２４は円形頂面２
０の中心部に開口することになる。円形頂面２０の外周
（円）の大きさは受光素子の受光面１２が外接する大き
さである。尚、円柱外形を有するフェルールを切削加工
してフェルール２２を得るのではなく、モールド或型に
よってフェルール２２を得るようにしても良い。FIG. 3 is a longitudinal cross-sectional view of a ferrule used in carrying out the present invention. In this embodiment, the end of a ferrule for an optical fiber connector having a generally cylindrical outer shape as shown by a two-dot chain line A is shaped into a truncated cone by grinding, and a ferrule having a circular top surface 20 is formed. He has created 22. When the outer shape of the ferrule is processed using such high-precision processing technology, the central pore 24 is formed on the circular top surface 2.
It will open at the center of 0. The size of the outer periphery (circle) of the circular top surface 20 is such that the light receiving surface 12 of the light receiving element is circumscribed. Note that instead of obtaining the ferrule 22 by cutting a ferrule having a cylindrical outer shape, the ferrule 22 may be obtained by molding.
本発明の実施例における受光モジュールの製造方法を第
４図により説明する。まず、光ファイバ１４を、その端
面が円形頂面２０と同一平面となるようにフェルール２
２の中心細孔２４に挿入固定する。光ファイバ１４の中
心細孔２４内への固定は、例えば、光ファイバ１４の端
面近傍において光ファイバ１４と中心細孔２４との間に
介在する接着剤により行われる。光ファイバ１４のフェ
ルール２２の外部に導き出された部分は、図では被覆が
施されていないように図示されているが、この部分につ
いては被覆を残しておいてこの被覆とフエルール２２の
後端側とを接着剤により固定するようにしても良い。A method of manufacturing a light receiving module according to an embodiment of the present invention will be explained with reference to FIG. First, insert the optical fiber 14 into the ferrule 2 so that its end surface is flush with the circular top surface 20.
It is inserted and fixed into the center pore 24 of No. 2. The optical fiber 14 is fixed in the central pore 24 by, for example, an adhesive interposed between the optical fiber 14 and the central pore 24 near the end face of the optical fiber 14. Although the portion of the optical fiber 14 led out of the ferrule 22 is shown as not being coated in the figure, the coating is left on this portion and the rear end side of the ferrule 22 is connected to the coating. and may be fixed with adhesive.
このように光ファイバ１４が挿入固定されたフェルール
２２に受光素子１８を装着する場合、受光素子１８の受
光部１６の中心がフェルール２２の軸線Ｂ上に位置する
ように受光素子１８を円形頂面２０に固定する必要があ
る。本発明では、受９
ー １ ０一
光素子の受光面１２が円形頂面２０の外周（円）に外接
するようにしているので、受光部１６の中心は正確にフ
ェルール２２の軸線Ｂ上に位置するようになる。受光素
子１８の円形頂面２０への密着固定は、同化したときに
受光すべき光の波長に対して透明な光学接着剤を用いて
行うことができる。When attaching the light receiving element 18 to the ferrule 22 into which the optical fiber 14 is inserted and fixed, the light receiving element 18 is mounted on the circular top surface so that the center of the light receiving part 16 of the light receiving element 18 is located on the axis B of the ferrule 22. It is necessary to fix it to 20. In the present invention, the light receiving surface 12 of the light receiving element 9-10 is circumscribed to the outer periphery (circle) of the circular top surface 20, so that the center of the light receiving portion 16 is precisely on the axis B of the ferrule 22. Become located. The light-receiving element 18 can be tightly fixed to the circular top surface 20 using an optical adhesive that is transparent to the wavelength of light to be received when assimilated.
一般に、光ファイバの空気中に露出した端面から放射さ
れた光は、その開口数に応じた角度で拡がってゆくが、
本実施例では、光ファイバｌ４の端面と受光素子の受光
部１６との間には前述の光学接着剤及び保護膜２６だけ
しか介在しておらず、しかもこれらの厚みは極めて薄い
ので、光ファイバ１４の端面から放射された光の拡がり
は殆ど無視することができ、従って、光ファイバ１４の
端面から出射した光を、光ファイバ１４の外径よりも大
きな径の受光部１６に良好に入射させることができる。Generally, light emitted from the end face of an optical fiber exposed to the air spreads at an angle corresponding to its numerical aperture.
In this embodiment, only the above-mentioned optical adhesive and protective film 26 are interposed between the end face of the optical fiber l4 and the light receiving part 16 of the light receiving element, and the thickness of these is extremely thin. The spread of the light emitted from the end face of the optical fiber 14 can be almost ignored, and therefore the light emitted from the end face of the optical fiber 14 is made to enter the light receiving part 16 having a diameter larger than the outer diameter of the optical fiber 14. be able to.
上述のように組立てられた受光モジュールは、第５図に
示すようにして基板に実装することができる。即ち、基
板３４上に固定された受光モジュールについて電気配線
を行うためには、基板３４上に設けられた電子回路３２
から導出される導体パターン３６．３８と受光素子１８
の背面に設けられた電極２８．３０とをそれぞれ電気的
に接続する必要があるので、この電気配線をフレキシブ
ルプリント基板４４により行ったものである。フレキシ
ブルプリント基板４４には少なくとも２本の帯状の導体
パターン４０．４２が形成されており、導体パターン４
０の両端と電極２８及び導体パターン３６とを並びに導
体パターン４２の両端と電極３０及び導体パターン３８
とを例えば半田ボンディングにより接続する。このよう
に本実施例では受光素子１８の受光部形成面と反対の側
に電極２８．３０を設けているので、容易に基板上の電
子回路との配線を行うことができ、よって、この受光モ
ジュールは電子回路との一体化に適している。尚、受光
モジュールのフェルール２２と基板３４との固定は、フ
ェルール２２の外周面及び基板３４の上面にメタライズ
処理を施しておき、半田付けにより行うことができる。The light receiving module assembled as described above can be mounted on a substrate as shown in FIG. That is, in order to conduct electrical wiring for the light receiving module fixed on the substrate 34, the electronic circuit 32 provided on the substrate 34 is
Conductor patterns 36 and 38 derived from the light receiving element 18
Since it is necessary to electrically connect the electrodes 28 and 30 provided on the back surface of the substrate, this electrical wiring is performed using a flexible printed circuit board 44. At least two strip-shaped conductor patterns 40 and 42 are formed on the flexible printed circuit board 44.
0 and the electrode 28 and the conductor pattern 36, and both ends of the conductor pattern 42 and the electrode 30 and the conductor pattern 38.
For example, they are connected by solder bonding. As described above, in this embodiment, since the electrodes 28 and 30 are provided on the opposite side of the light-receiving part forming surface of the light-receiving element 18, wiring with the electronic circuit on the board can be easily performed. The module is suitable for integration with electronic circuits. Note that the ferrule 22 of the light receiving module and the substrate 34 can be fixed by soldering after metallizing the outer peripheral surface of the ferrule 22 and the upper surface of the substrate 34.
本実施例では、受光素子の受光面１２が正方形であると
したが、受光素子の受光面の形状は長方形であっても良
い。なぜならば、受光面を長方形にした場合でも、当該
長方形がフェルールの円形頂面の外周に外接するように
しておくことによって、当該長方形の対角線の交点を円
形頂面の中心に一致させることができるからである。In this embodiment, the light-receiving surface 12 of the light-receiving element is square, but the shape of the light-receiving surface of the light-receiving element may be rectangular. This is because even if the light-receiving surface is rectangular, by making the rectangle circumscribe the outer periphery of the circular top surface of the ferrule, the intersection of the diagonal lines of the rectangle can be aligned with the center of the circular top surface. It is from.
発明の効果
以上説明したように、本発明によれば、受光素子と光フ
ァイバの位置調整を行うことなしに組み立てることがで
きる受光モジュールの提供が可能になるという効果を奏
する。Effects of the Invention As described above, the present invention has the effect that it is possible to provide a light receiving module that can be assembled without adjusting the positions of the light receiving element and the optical fiber.
断面図、
第４図は本発明の実施例における受光モジュールの製造
方法の説明図、
第５図は本発明の実施例において受光モジュールを基板
に実装した状態を示す斜視図、第６図は従来の受光モジ
ュールの断面図である。4 is an explanatory diagram of a method of manufacturing a light receiving module in an embodiment of the present invention, FIG. 5 is a perspective view showing a state in which the light receiving module is mounted on a board in an embodiment of the present invention, and FIG. 6 is a conventional method. FIG. 3 is a cross-sectional view of the light receiving module.
２・・・受光面、 ４・・・光ファイバ、 ６・・・受光部、 ８・・・受光素子、 ０・・・円形頂面、 ２・・・フェルール、 ４・・・中心細孔。2... Light receiving surface, 4...optical fiber, 6... Light receiving section, 8... Light receiving element, 0...Circular top surface, 2...ferrule, 4... Central pore.
第１図は本発明の原理図、 第２図は本発明の実施に使用する受光素子の斜視図、 Figure 1 is a diagram of the principle of the present invention. FIG. 2 is a perspective view of a light receiving element used in carrying out the present invention;
Claims (1)
（１４）の外径よりも大きな径の受光部（１６）が形成
された受光素子（１８）と、 その端部が、上記受光面（１２）が外接する大きさの円
形頂面（２０）を有する円錐台状に形成されたフェルー
ル（２２）とを備え、 上記光ファイバ（１４）を、その端面が上記円形頂面（
２０）と同一平面となるように上記フェルール（２２）
の中心細孔（２４）に挿入固定し、 上記受光素子（１８）を、その受光面（１２）が上記円
形頂面（２０）の外周に外接するように上記フェルール
（２２）に密着固定したことを特徴とする受光モジュー
ル。[Claims] A light-receiving element (18) in which a light-receiving part (16) having a diameter larger than the outer diameter of an optical fiber (14) is formed in the center of a rectangular or square light-receiving surface (12), and an end thereof. is provided with a ferrule (22) formed in the shape of a truncated cone having a circular top surface (20) of a size that circumscribes the light receiving surface (12), and the optical fiber (14) is provided with an end surface having the circular shape. Top surface (
20) so that it is on the same plane as the ferrule (22).
The light-receiving element (18) was tightly fixed to the ferrule (22) so that its light-receiving surface (12) circumscribed the outer periphery of the circular top surface (20). A light receiving module characterized by:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24086889A JPH03103806A (en) | 1989-09-19 | 1989-09-19 | Light receiving module |
| US07/553,609 US5065011A (en) | 1989-07-20 | 1990-07-18 | Photodetector module for coupling with optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24086889A JPH03103806A (en) | 1989-09-19 | 1989-09-19 | Light receiving module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03103806A true JPH03103806A (en) | 1991-04-30 |
Family
ID=17065894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24086889A Pending JPH03103806A (en) | 1989-07-20 | 1989-09-19 | Light receiving module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03103806A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007017808A (en) * | 2005-07-08 | 2007-01-25 | National Institute Of Advanced Industrial & Technology | Optical transmission medium with optical element and method of manufacturing the same |
| JP2007067288A (en) * | 2005-09-01 | 2007-03-15 | Sumitomo Electric Ind Ltd | Optical fiber terminal provided with photo-electric conversion function and method of mounting it |
| JP2009053277A (en) * | 2007-08-23 | 2009-03-12 | National Institute Of Advanced Industrial & Technology | Optical module and method for manufacturing the same |
| JP2013011704A (en) * | 2011-06-29 | 2013-01-17 | Kyocera Corp | Fiber stub with optical element, optical receptacle using the same, and optical module |
-
1989
- 1989-09-19 JP JP24086889A patent/JPH03103806A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007017808A (en) * | 2005-07-08 | 2007-01-25 | National Institute Of Advanced Industrial & Technology | Optical transmission medium with optical element and method of manufacturing the same |
| JP2007067288A (en) * | 2005-09-01 | 2007-03-15 | Sumitomo Electric Ind Ltd | Optical fiber terminal provided with photo-electric conversion function and method of mounting it |
| JP2009053277A (en) * | 2007-08-23 | 2009-03-12 | National Institute Of Advanced Industrial & Technology | Optical module and method for manufacturing the same |
| JP2013011704A (en) * | 2011-06-29 | 2013-01-17 | Kyocera Corp | Fiber stub with optical element, optical receptacle using the same, and optical module |
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