JPS63229409A - Light emitting/light receiving module - Google Patents

Abstract

PURPOSE:To enable an optical connector to be attached and detached without using any lens for optical coupling by providing a connecting member which connects the optical connector to a cylindrical member optically and mechanically. CONSTITUTION:A semiconductor laser LD 1 is fixed to a mount base 2 in the center. Light emitted by the LD 1 is incident on an optical fiber (SMF) 3 is inserted and fixed in the center of a both-end polished ferrule 4. Both ends of the both-end polished ferrule 4 which contains SMF 3 are polished into specular spherical surfaces with a 60mm diameter, so reflection on the end surfaces is small. The both-end polished ferrule 4 is fixed to a cylindrical fixing component 8, which is fixed to the mount base 2, so the positions of the LD 1 and SMF 3 are also fixed. A split sleeve 7 is made to cover the both-end polished ferrule 4 projecting from the cylindrical fixing component 8 and a ferrule fixing component 9 is further made to cover it and fixed to the cylindrical fixing component 8. When a ferrule 5 whose tip is polished into a specular spherical surface while having the same external diameter with the both-end polished ferrule 4 is inserted into the split sleeve 7, the optical axis of the SMF 3 and SMF 6 are aligned with each other, so optical coupling with small loss is attained.

Description

Translated fromJapanese

【発明の詳細な説明】産業上の利用分野本発明は、光フアイバ通信に使用する発光・受光モジュ
ールに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light emitting/light receiving module used in optical fiber communication.

従来の技術従来、この種の発光モジュールおよび受光モジュールは
第４図に示すような構成であった。第４図において、２
１は発光素子、２２はパッケージ、２ｓｌｄｏノドレン
ズ、２４は光フアイバ固定円筒、２６は光ファイバ、２
６はロッドレンズ固定部材、２７は光ファイバ固定部材
である。2. Description of the Related Art Conventionally, a light emitting module and a light receiving module of this type have a structure as shown in FIG. In Figure 4, 2
1 is a light emitting element, 22 is a package, 2 is a sldo lens, 24 is an optical fiber fixing cylinder, 26 is an optical fiber, 2
6 is a rod lens fixing member, and 27 is an optical fiber fixing member.

発光素子２１はパッケージ２２に入れて保護している。The light emitting element 21 is protected by being placed in a package 22.

発光素子２１から出射した光はロッドレンズ２３で集光
した後、光ファイバ２６に入射する。パッケージ２２と
ロッドレンズ２３はロッドレンズ固定部品２６を用いて
接着剤または金属溶接固定する。光ファイバ２６はフェ
ルール２４に挿入した後、７エルール２４を精度良く挿
入できる光フアイバ固定部品２アに挿入する。フェルー
ル２４を軸方向に動かして焦点距離を調整し、また、光
フアイバ固定部品２７を径方向に動かして位置調整をし
た後、これらを接着固定、または、メタル固定してモジ
ュールを構成する。The light emitted from the light emitting element 21 is focused by the rod lens 23 and then enters the optical fiber 26. The package 22 and the rod lens 23 are fixed using an adhesive or metal welding using a rod lens fixing member 26. After the optical fiber 26 is inserted into the ferrule 24, the optical fiber 26 is inserted into the optical fiber fixing part 2a into which the ferrule 24 can be inserted with high accuracy. After adjusting the focal length by moving the ferrule 24 in the axial direction and adjusting the position by moving the optical fiber fixing part 27 in the radial direction, these are fixed by adhesive or metal to form a module.

また、受光モジュールは、発光素子を受光素子に置換え
た構成を持つ。その動作は、光ファイバ２５から出射し
た光をロッドレンズ２３で集光して受光素子２１に照射
するものである。Further, the light receiving module has a configuration in which the light emitting element is replaced with a light receiving element. Its operation is to condense light emitted from the optical fiber 25 using the rod lens 23 and irradiate it onto the light receiving element 21 .

発明が解決しようとする問題点このような従来の構成では、多くの場合光学結合にはレ
ンズを使用していた。さらに、発光素子。Problems to be Solved by the Invention In such conventional configurations, lenses are often used for optical coupling. Furthermore, a light emitting element.

レンズ、シングルモードファイバの光軸を合わせてそれ
ぞれを固定しないと、効率の高い光学結合を維持できな
かった。光ファイバが固定されているのでモジュールの
形状は、光ファイバが附随したピッグテール形になる。Highly efficient optical coupling could not be maintained unless the optical axes of the lens and single-mode fiber were aligned and fixed. Since the optical fiber is fixed, the module has a pigtail shape with the optical fiber attached.

このために、用途に因っては光ファイバの処理が煩しく
なると言う問題点があった。For this reason, there is a problem in that processing of the optical fiber becomes complicated depending on the application.

また、受光モジュールの場合、光ファイバから出射した
光をレンズで集光して受光素子に照射するため、波長λ
１の光には大変良い特性を示しても、波長λ２の光には
レンズの色収差のために焦点かボケ、十分な特性が得ら
れない。このために、各波長用のモジュールを使用しな
ければならない。In addition, in the case of a light-receiving module, the light emitted from the optical fiber is focused by a lens and irradiated to the light-receiving element, so the wavelength λ
Even if it exhibits very good characteristics for light of wavelength λ2, sufficient characteristics cannot be obtained for light of wavelength λ2, which is out of focus due to the chromatic aberration of the lens. For this purpose, a module for each wavelength must be used.

本発明はこのような問題点を解決するもので、光学結合
にレンズを使用せず、また、ＳＭＦを用いた場合でも光
コネクタを着脱可能な発光・受光モジュールを提供する
ことを目的とするものである。The present invention solves these problems, and aims to provide a light emitting/light receiving module that does not use a lens for optical coupling and can attach and detach an optical connector even when using an SMF. It is.

問題点を解決するための手段この問題点を解決するために本発明は、中心に光ファイ
バを有する円筒の両端を鏡面研磨し、これを発光素子ま
たは受光素子に近づけ、それらの光軸が一致するように
固定部材を用いて接続固定する。さらに、接続用部材を
用いて光コネクタと円筒を光学的且、機械的に接続する
ようにしたものである。Means for Solving the Problem In order to solve this problem, the present invention mirror-polishes both ends of a cylinder with an optical fiber in the center, brings it closer to the light-emitting element or the light-receiving element, and aligns their optical axes. Connect and fix using the fixing member as shown. Furthermore, the optical connector and the cylinder are optically and mechanically connected using a connecting member.

作　　用この構成により１、レンズ無しで素子との光学結合がで
きるので、モジュールの製作が簡単になる。Functions: 1. With this configuration, optical coupling with the element can be achieved without a lens, which simplifies the production of the module.

さらに、両端研磨フェルールを素子に近づけて固定する
ため、コネクタフェルールの長さにバラツキがあっても
必ず両端研磨フェルールの位置で止まシ、素子を傷つけ
ない。また、通常の光コネクタと同様に、両端研磨フェ
ルールとコネクタフェルールを割スリーブで安定に結合
できる。これによシ、ＳＭＦを使った光コネクタを着脱
できるモジュールを構成できることとなる。Furthermore, since the both-end polished ferrule is fixed close to the element, even if the length of the connector ferrule varies, it always stops at the position of the both-end polished ferrule and does not damage the element. Also, like a normal optical connector, the both-end polished ferrule and the connector ferrule can be stably connected using a split sleeve. As a result, it is possible to configure a module to which an optical connector using SMF can be attached and detached.

実施例第１図は本発明の一実施例による発光モジュールの構成
を示す断面図である。第１図において１は発光素子、２
はマウント台、３，６は光フフイバ、４は円筒部品、５
は光コネクタの７エルール、７は接続用部材、８は円筒
固定部品、９はフェルール固定部品、１ｏはバネ押え部
品、１１はコイルバネ、１２は締付はナツト、１３はネ
ジ部、１５は電極端子である。Embodiment FIG. 1 is a sectional view showing the structure of a light emitting module according to an embodiment of the present invention. In FIG. 1, 1 is a light emitting element, 2
is a mount base, 3 and 6 are optical fibers, 4 is a cylindrical part, 5
7 is the optical connector's errule, 7 is the connecting member, 8 is the cylindrical fixing part, 9 is the ferrule fixing part, 1o is the spring holding part, 11 is the coil spring, 12 is the tightening nut, 13 is the screw part, and 15 is the electrode. It is a terminal.

半導体レーザＬＤ１はマウント台２の中央に固定する。The semiconductor laser LD1 is fixed at the center of the mount base 2.

ＬＤｌから出射した光は、両端研磨フェルール４の中央
に挿入・固定したＳＭＦ３に入射する。このＳＭＦ３の
入った両端研磨フェル−ル４の両端は半径６０　ｍの球
面に鏡面研磨してあるので、端面からの反射は大変小さ
い。両端研磨フェルール４は円筒固定部品８に固定して
あり、また、円筒固定部品８はマウント台２に固定して
あるので、ＬＤｌとＳＭＦ３の位置も固定される。The light emitted from the LD1 enters the SMF 3 inserted and fixed at the center of the ferrule 4 with both ends polished. Since both ends of the double-end polished ferrule 4 containing the SMF 3 are mirror-polished into spherical surfaces with a radius of 60 m, reflection from the end faces is very small. Since the both-end polished ferrule 4 is fixed to the cylindrical fixing part 8, and the cylindrical fixing part 8 is fixed to the mount base 2, the positions of the LD1 and the SMF 3 are also fixed.

円筒固定部品８の外部に出た両端研磨フェルール４の部
分に割スリーブ７を被せ、さらに、フェルール固定部品
９を被せ、これを円筒固定部品８に固定する。割スリー
ブ了は第２図ａに示すように、円筒の一部に切れ目があ
る。第２図すに示すように、この中に円筒の内径よシも
少し太い同径の２本の円柱をそれぞれ両端から挿入する
と、２本の円柱は中心軸が一致して接続できる。ＳＭＦ
のコア径は１０μｍと小さいが、割スリーブ７を用いれ
ばほとんど損失なく接続できる。A split sleeve 7 is placed over the portion of the both-end polished ferrule 4 protruding from the outside of the cylindrical fixing part 8, and then a ferrule fixing part 9 is put on and this is fixed to the cylindrical fixing part 8. As shown in Figure 2a, the split sleeve has a cut in a part of the cylinder. As shown in Figure 2, by inserting two cylinders with the same diameter, which are slightly thicker than the inner diameter of the cylinder, from both ends, the two cylinders can be connected with their central axes aligned. SMF
Although the core diameter is as small as 10 μm, if the split sleeve 7 is used, connection can be made with almost no loss.

割スリーブ７に外径が両端研磨フェルール４と同じで、
中心にＳＭＦｓを挿入固定して先端を半径８０＋ｍの球
面に鏡面研磨したフェルール６を差込むと、ＳＭＦ３と
ＳＭＦ６の光軸は一致するので、小さな損失で光学結合
ができる。ＳＭＦ３とＳＭＦ６は密着しておく必要があ
るので、フェルール５の他端にコイルバネ１１およびバ
ネ押え部品１ｏを被せる。さらに、その上から締付はナ
ツト１２を被せ、円筒固定部品８のネジ部１３ａに締付
はナツト１２のネジ部１３ｂをネジ込む。フェルール６
は締付はナツト１２を緩めて引き抜くことができる。勿
論、フェルール６を割スリーブ７に差込み、締付はナツ
ト１２をネジ込めばＬＤｌから出射した光を光ファイバ
６に結合できることは言うまでもない。The outer diameter of the split sleeve 7 is the same as that of the ferrule 4, which is polished at both ends.
When SMFs are inserted and fixed in the center and a ferrule 6 whose tip is mirror-polished to a spherical surface with a radius of 80+m is inserted, the optical axes of SMF 3 and SMF 6 coincide, so optical coupling can be achieved with small loss. Since the SMF3 and SMF6 need to be in close contact with each other, the other end of the ferrule 5 is covered with the coil spring 11 and the spring holding part 1o. Furthermore, the tightening nut 12 is placed over it, and the threaded portion 13b of the tightening nut 12 is screwed into the threaded portion 13a of the cylindrical fixing component 8. Ferrule 6
To tighten, loosen the nut 12 and pull it out. Of course, it goes without saying that the light emitted from the LDl can be coupled to the optical fiber 6 by inserting the ferrule 6 into the split sleeve 7 and tightening the nut 12.

第３図は本発明の他の実施例による受光モジュールの構
成を示す断面図である。第３図において、１４は受光素
子であり、その池は第１図と同じである。FIG. 3 is a sectional view showing the structure of a light receiving module according to another embodiment of the present invention. In FIG. 3, 14 is a light receiving element, and its pond is the same as in FIG.

光ファイバ６を伝搬する光は割スリーブ７で接続した両
端研磨フェルール４に結合した後、受光素子１４に照射
する。両端研磨フェルール４は受光素子１４に大変接近
しているので、１０／Ｊｍの光ファイバのコアから出射
した光はすべて受光素子１４に照射するので、受光素子
１４の光／電気の変換効率を最大てして使用することが
できる。The light propagating through the optical fiber 6 is coupled to the both-end polished ferrule 4 connected by the split sleeve 7, and then irradiated onto the light receiving element 14. Since the both-end polished ferrule 4 is very close to the light receiving element 14, all the light emitted from the core of the 10/Jm optical fiber is irradiated to the light receiving element 14, thereby maximizing the light/electricity conversion efficiency of the light receiving element 14. It can be used as

さらに、光ファイバ３から出射した光を直接受光素子１
４に照射しているので、光ファイバ６に受光素子１４の
光感度がある波長光が入射しても、受光素子１４を最良
の性能で使用することができる。Furthermore, the light emitted from the optical fiber 3 is directly transmitted to the light receiving element 1.
4, the light receiving element 14 can be used with the best performance even if the optical fiber 6 receives light of a wavelength to which the light receiving element 14 is sensitive.

発明の効果以上のように本発明によれば、中心に光ファイバを有す
る円筒の両端を鏡面研磨し、これを発光素子または受光
素子に近づけ、それらの光軸が一致するように固定部材
を用いて円筒を接続固定することにより、発光素子また
は受光素子と光コネクタを簡単に接続できる。さらに、
光コネクタの着脱ができるので使い勝手が良いと言う効
果が得られる。特に受光モジュールの場合、光ファイバ
から出射する光は全て受光素子に照射されるので、受光
素子の受光感度のある波長域の光に遜色無く使用できる
ため、一つの受光モジュールを広い波長域で使用できる
と言う特長を持つ。Effects of the Invention As described above, according to the present invention, both ends of a cylinder having an optical fiber in the center are mirror polished, brought close to a light emitting element or a light receiving element, and a fixing member is used to align the optical axes of the cylinder. By connecting and fixing the cylinder with the cylinder, the light emitting element or the light receiving element and the optical connector can be easily connected. moreover,
Since the optical connector can be attached and detached, it is easy to use. In particular, in the case of a light receiving module, all the light emitted from the optical fiber is irradiated onto the light receiving element, so it can be used just as well as light in the wavelength range to which the light receiving element is sensitive, so one light receiving module can be used over a wide wavelength range. It has the characteristic that it can be done.

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

第１図は本発明の一実施例における発光モジュールの構
成を示す断面図、第２図ａは本発明の一実施例による発
光・受光モジュールに使用した部品の一つである割スリ
ーブを示す斜視図、第２図すは同割スリーブの使用状態
を説明する断面図、第３図は本発明の他の実施例におけ
る受光モジュールの構成を示す断面図、第４図は従来の
発、光・受光モジュールの構成を示す断面図である。１・・・・・発光素子、２・・・・・・マウント台、３
．６・・・光ファイバ、４・・・・・・両面研磨フェル
ール、６・・・・・・光コネクタのフェルール、了・・
・・・・割ス’）−７”、８・・・・円筒固定部品、９
・・・・・・フェルール固定部品、１ｏ・・・・・・バ
ネ押え部品、１１・・・・・・バネ、１２・・・・・・
締付はナツト、１３・・・・・・ネジ部、１４・・・・
・・受光素子。代理人の氏名　弁理士　中　尾　敏　男　ほか１名ｆ−
−−梵光漿蚕第２図FIG. 1 is a sectional view showing the configuration of a light emitting module according to an embodiment of the present invention, and FIG. 2 a is a perspective view showing a split sleeve, which is one of the parts used in the light emitting/light receiving module according to an embodiment of the present invention. 2 is a cross-sectional view illustrating how the split sleeve is used, FIG. 3 is a cross-sectional view showing the configuration of a light receiving module in another embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional view showing the configuration of a light receiving module. 1...Light emitting element, 2...Mount stand, 3
．． 6...Optical fiber, 4...Double-sided polished ferrule, 6...Optical connector ferrule, completed...
...Split')-7", 8...Cylindrical fixed part, 9
...Ferrule fixing part, 1o...Spring holding part, 11...Spring, 12...
Tighten with nut, 13...thread part, 14...
··Light receiving element. Name of agent: Patent attorney Toshio Nakao and 1 other person f-
--Banko Seriku silkworm Figure 2

Claims (2)

Translated fromJapanese

【特許請求の範囲】[Claims]（１）一つの発光素子または受光素子と、中心に光ファ
イバを有し両端面を鏡面研磨した円筒部材と、上記発光
素子または受光素子の中心軸と上記円筒部材の光ファイ
バの光軸が一致するように上記円筒部材を整列固定する
ための円筒固定部材と、上記円筒部材に光コネクタを光
学的且、機械的に接続する接続部材とからなる発光・受
光モジュール。(1) One light-emitting element or light-receiving element, a cylindrical member with an optical fiber in the center and mirror-polished end surfaces, and the central axis of the light-emitting element or light-receiving element and the optical axis of the optical fiber of the cylindrical member are aligned. A light emitting/light receiving module comprising: a cylindrical fixing member for aligning and fixing the cylindrical member; and a connecting member for optically and mechanically connecting an optical connector to the cylindrical member.（２）円筒部材の端面が球面状に研磨してある特許請求
の範囲第１項記載の発光・受光モジュール。(2) The light emitting/light receiving module according to claim 1, wherein the end surface of the cylindrical member is polished into a spherical shape.