JPS5933413A - Light emitting module - Google Patents

Light emitting module

Info

Publication number
JPS5933413A
JPS5933413A JP57144251A JP14425182A JPS5933413A JP S5933413 A JPS5933413 A JP S5933413A JP 57144251 A JP57144251 A JP 57144251A JP 14425182 A JP14425182 A JP 14425182A JP S5933413 A JPS5933413 A JP S5933413A
Authority
JP
Japan
Prior art keywords
lens
light
light emitting
optical fiber
hole
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
Application number
JP57144251A
Other languages
Japanese (ja)
Inventor
Masaaki Tojo
正明 東城
Keiichi Iiyama
恵市 飯山
Yoshikazu Suehiro
末広　芳和
「もち」田　嘉久
Yoshihisa Mochida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57144251A priority Critical patent/JPS5933413A/en
Publication of JPS5933413A publication Critical patent/JPS5933413A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Led Device Packages (AREA)

Abstract

PURPOSE:To improve the optical coupling effect of light, by providing the first lens system which converts the divergent radiant light of a light emitting element of a parallel light, the second lens system which converts this parallel light to a convergent light, and an optical fiber to which this convergent light is made incident. CONSTITUTION:A module body lower part 11 has a recessed taper 11a to be fitted to its projecting taper, and a rod lens 9 and an optical fiber 12 are attached to its through hole 11b. The position of the rod lens 9 is so adjusted that the end face of the optical fiber coincides with the focal surface of the rod lens 9. The concentricity between a hole 11'b for lens and a hole 11''b for a core 12a incorporating the fiber 12 is enhanced easily, and the precision of the hole 11'b for lens is improved to make adjustments unnecessary except the adjustment for the focal length. In respect to the adjustment of the focal length, a ring 14 or the like is attached to a selfox lens and is fixed to the module body 11 so that the length between the lens 9 and the fiber 12 coincides with the focal length.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は発光素子の光を光ファイバに入光させる発光
モジニールに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a light emitting module that allows light from a light emitting element to enter an optical fiber.

従来例の構成とその問題点 従来のモジュール本体と光ファイバの接続として、たと
えば第１図に示すように発光素子１から放射された光が
ロッドレンズ２で集光され、これを光ファイバ３と光学
的に結合するように調整されてモジュール本体４によυ
固定される構成があった。しかし、発光素子ｌの発光面
積は発光ダイオードの場合で約５００ミクロン（ロ）で
あり、レンズ１個で発光ダイオードからの放射光を集光
した場合の最小スポット径は発光ダイオードの発光面積
５００ミクロン（ロ）より小さくはできない。一方、光
ファイバ３の直径は約５０ミクロンなので、発光ダイオ
ードの放射光の一部しか光ファイバに入らない。その結
果、発光素子１と光ファイバ３との結合効率が悪いとい
う欠点があった。Configuration of the conventional example and its problems In the conventional connection between the module main body and the optical fiber, for example, as shown in FIG. υ adjusted to optically couple with the module body 4.
There was a fixed configuration. However, the light emitting area of the light emitting element l is approximately 500 microns (b) in the case of a light emitting diode, and the minimum spot diameter when the emitted light from the light emitting diode is focused with one lens is 500 microns (b) of the light emitting area of the light emitting diode. (b) It cannot be made smaller. On the other hand, since the diameter of the optical fiber 3 is approximately 50 microns, only a portion of the light emitted from the light emitting diode enters the optical fiber. As a result, there was a drawback that the coupling efficiency between the light emitting element 1 and the optical fiber 3 was poor.

発明の目的 この発明の目的は、発光素子から放射さｈた光と光ファ
イバとの光学的な結合効率を向上させることができる発
光モジュールを提供することである。OBJECTS OF THE INVENTION An object of the present invention is to provide a light emitting module that can improve the optical coupling efficiency between light emitted from a light emitting element and an optical fiber.

発明の構成 この発明は２種類のレンズ系を用い、第１のしンズ系で
発光素子の放射光を平行光束にし、第２のレンズ系で平
行光束を集束光にして光ファイバに入射させるようにし
ている。このため第２のレンズ系による集束光の最小ス
ポットはその焦点付近で光ファイバの直径より小さくで
き、発光素子の光のほとんどを光ファイバに入光できる
こととなる。Structure of the Invention This invention uses two types of lens systems, the first lens system converts the light emitted from the light emitting element into a parallel light beam, and the second lens system converts the parallel light beam into a convergent light beam which is input into an optical fiber. I have to. Therefore, the minimum spot of the light focused by the second lens system can be made smaller than the diameter of the optical fiber near its focal point, and most of the light from the light emitting element can enter the optical fiber.

実施例の説明 この発明の一実施例を第２図に示す。すなわち、モジュ
ール本体上部１０の中心軸に形成された段付孔１０ａの
小径側に発光−素子５が取付けられ、段付孔１０１１の
大径側から半凸レンズ６の平面側が段部１０ｂに載せら
れ、半凸レンズ６の上にモジュール本体上部１０の内径
より高精度でわずかに小さい外径を持つテフロンリング
８を乗せ、レンズ固定リング７によシ半凸レンズ６をモ
ジュール本体上部１０に固定する。このときテフロンリ
ング８の半凸レンズ６に接する面は傾斜し、またテフロ
ンリング８とレンズ固定リング７は平面（輪）で接して
いるので、レンズ固定リング７をねじ込むことにより半
凸レンズ６とモジュール本体≠キ４１０の中心軸は一致
し、発光素子５とレンズ６が中心軸上に位置する。モジ
ュール本体上部１０の発光素子′５の反対側の端部は外
周が突状テーバ１０Ｃを形成している。一方、モジュー
ル本体下部１１はその突状テーバに嵌合する凹状テーバ
ｌｌａを有し、その貫通孔１１ｂにロッドレンズ９およ
び光ファイバ１２が取付けられる。この場合、光ファイ
バ１２の端面がロッドレンズ９の焦点距離に一致するよ
うにロッドレンズ９の位置を調整するが、レンズ用の穴
１１′ｈとファイバ１２を組込んだ中子１２ａ用の穴１
１′ｂとの同心度を良くすることは容易であり、またレ
ンズ用の穴１１′ｂの精度を上げることにより焦点削離
以外は無調整とすることができる。そして焦点距離の調
整はレンズ９とファイバ１２の距離が焦点距離になるよ
うにセルフォックレンズにリング１４等をつけモジュー
ル本体下止１１に固定するようにする。モジュール本体
上部１０とモジュール本体下部１１はＯ１１記したよう
にテーバ１０Ｃ０１１ａが付いているので、この２つの
中心軸を容易に合わせることができ、この両者は往んだ
または接着剤１３で固定する。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIG. That is, the light emitting element 5 is attached to the small diameter side of the stepped hole 10a formed on the central axis of the upper module body 10, and the flat side of the semi-convex lens 6 is placed on the stepped portion 10b from the large diameter side of the stepped hole 1011. A Teflon ring 8 having an outer diameter slightly smaller than the inner diameter of the upper part 10 of the module body is placed on the semi-convex lens 6, and the semi-convex lens 6 is fixed to the upper part 10 of the module body by the lens fixing ring 7. At this time, the surface of the Teflon ring 8 that contacts the semi-convex lens 6 is inclined, and the Teflon ring 8 and the lens fixing ring 7 are in contact with each other on a flat surface (ring), so by screwing the lens fixing ring 7, the semi-convex lens 6 and the module body The center axes of the keys 410 coincide, and the light emitting element 5 and the lens 6 are located on the center axes. The outer periphery of the opposite end of the module main body upper part 10 to the light emitting element '5 forms a protruding taper 10C. On the other hand, the module main body lower part 11 has a concave taber lla that fits into the protruding taber, and the rod lens 9 and the optical fiber 12 are attached to the through hole 11b. In this case, the position of the rod lens 9 is adjusted so that the end surface of the optical fiber 12 matches the focal length of the rod lens 9, but the hole 11'h for the lens and the hole for the core 12a in which the fiber 12 is installed are 1
It is easy to improve the concentricity with lens hole 11'b, and by increasing the accuracy of the lens hole 11'b, adjustments other than focus ablation can be made unnecessary. The focal length is adjusted by attaching a ring 14 or the like to the SELFOC lens and fixing it to the lower stop 11 of the module body so that the distance between the lens 9 and the fiber 12 becomes the focal length. Since the module main body upper part 10 and the module main body lower part 11 are provided with a taber 10C011a as described in O11, these two central axes can be easily aligned, and both are fixed with adhesive 13.

発光ダイオード５も半凸レンズ６の焦点に位置するよう
に調整するが、焦点に合ったかどうかの確認は光ファイ
バ１２に出力される光パワーが最大になったときに発光
ダイオード５は半凸レンズ６の焦点に位置し、かつ半凸
レンズ６を通過した光は平行光線になったと見なせる。The light emitting diode 5 is also adjusted so that it is located at the focal point of the semi-convex lens 6, but to check whether it is in focus, the light emitting diode 5 is adjusted to be located at the focal point of the semi-convex lens 6. The light that is located at the focal point and has passed through the semi-convex lens 6 can be considered to have become parallel rays.

このように、発光ダイオードから放射された光を一旦平
行光に変換し、再び集光することにより、一つのレンズ
では集光部のスポット径を発光部の大きさより小さくで
きなかったのに対し、発光部と集光部を平行光で結合す
ると集光レンズ（ロッドレンズ９）に入射する光は平行
光なのでそのスポット径はレンズの集光能力によって決
定され、発光部の大きさの影響をなくすことができる。In this way, by converting the light emitted from the light emitting diode into parallel light and focusing it again, it was not possible to make the spot diameter of the light focusing part smaller than the size of the light emitting part with a single lens. When the light emitting part and the condensing part are combined with parallel light, the light that enters the condensing lens (rod lens 9) is parallel light, so its spot diameter is determined by the focusing ability of the lens, eliminating the influence of the size of the light emitting part. be able to.

したがって、集光部のスポット径は発光部の大きさに関
係なく小さくできるので、スポット径を５０ミクロン以
Ｆにしてやれば光ファイバ１２との結合効率を晶めるこ
とかできる。Therefore, the spot diameter of the light condensing section can be made small regardless of the size of the light emitting section, so that the coupling efficiency with the optical fiber 12 can be improved by setting the spot diameter to 50 microns or more.

発明の効用 この発明の発光モジュールは、発光素子と光フアイバ間
の光の結合効率を従来よりも高めることができるという
効果がちる。ADVANTAGE OF THE INVENTION The light emitting module of the present invention has the advantage that the coupling efficiency of light between the light emitting element and the optical fiber can be increased more than before.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来例の断面図、第２図はこの発明の一実施例
の断面図である。 ５・・・発光素子、６・・・半凸レンズ（第１のレンズ
糸）、９・・・ロッドレンズ（脩２のレンズ系）、１０
・・・モジュール不体上部（第１の本体）、１１・・・
モジュール本体下部（第２の本体）、１２・・・光ファ
イバFIG. 1 is a sectional view of a conventional example, and FIG. 2 is a sectional view of an embodiment of the present invention. 5... Light emitting element, 6... Semi-convex lens (first lens thread), 9... Rod lens (lens system of Shu 2), 10
...Module intangible upper part (first body), 11...
Module main body lower part (second main body), 12... optical fiber

Claims (2)

【特許請求の範囲】[Claims] （１）　　発光素子と、この発光素子の発散放射光を平
行光に変換する第゛１のレンズ系と、この第１のレンズ
系の平行光を集束光に変換する第２のレンズ系と、この
第２のレンズ系の集束光を入光する光ファイバとを備え
た発光モジー−ル。(1) A light emitting element, a first lens system that converts the divergent radiation of the light emitting element into parallel light, and a second lens system that converts the parallel light of the first lens system into convergent light; and an optical fiber into which the focused light of the second lens system enters. （２）　　前記発光素子と第１のレンズ系は第１の本体
に保持され、前記第２のレンズ系と光ファイバの端部と
は第２の本体に保持され、前記第１および第２の本体は
相互に円すい嵌合結合される特許請求の範囲第（１）項
記載の発光モジー−ル。(2) The light emitting element and the first lens system are held in a first body, the second lens system and the end of the optical fiber are held in the second body, and the first and second lens systems are held in the second body. The light emitting module according to claim 1, wherein the main bodies are connected to each other in a conical fit.
JP57144251A 1982-08-19 1982-08-19 Light emitting module Pending JPS5933413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57144251A JPS5933413A (en) 1982-08-19 1982-08-19 Light emitting module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57144251A JPS5933413A (en) 1982-08-19 1982-08-19 Light emitting module

Publications (1)

Publication Number Publication Date
JPS5933413A true JPS5933413A (en) 1984-02-23

Family

ID=15357747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57144251A Pending JPS5933413A (en) 1982-08-19 1982-08-19 Light emitting module

Country Status (1)

Country Link
JP (1) JPS5933413A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156905U (en) * 1986-03-27 1987-10-05
FR2611388A1 (en) * 1987-02-26 1988-09-02 Cit Alcatel ACTIVE OPTICAL MODULE FOR CONNECTOR SOCKET
JPS63240510A (en) * 1987-03-27 1988-10-06 Ando Electric Co Ltd Connector for optical module and optical plug
EP0399684A2 (en) * 1989-05-22 1990-11-28 Tektronix Inc. Laser pigtail assembly and method of manufacture
EP1109043A1 (en) * 1999-12-16 2001-06-20 Nec Corporation Semiconductor laser module

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156905U (en) * 1986-03-27 1987-10-05
JPH0514251Y2 (en) * 1986-03-27 1993-04-16
FR2611388A1 (en) * 1987-02-26 1988-09-02 Cit Alcatel ACTIVE OPTICAL MODULE FOR CONNECTOR SOCKET
JPS63240510A (en) * 1987-03-27 1988-10-06 Ando Electric Co Ltd Connector for optical module and optical plug
EP0399684A2 (en) * 1989-05-22 1990-11-28 Tektronix Inc. Laser pigtail assembly and method of manufacture
EP1109043A1 (en) * 1999-12-16 2001-06-20 Nec Corporation Semiconductor laser module

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