JP2680898B2 - Detachable connector type semiconductor laser module - Google Patents
Detachable connector type semiconductor laser moduleInfo
- Publication number
- JP2680898B2 JP2680898B2 JP1208262A JP20826289A JP2680898B2 JP 2680898 B2 JP2680898 B2 JP 2680898B2 JP 1208262 A JP1208262 A JP 1208262A JP 20826289 A JP20826289 A JP 20826289A JP 2680898 B2 JP2680898 B2 JP 2680898B2
- Authority
- JP
- Japan
- Prior art keywords
- connector
- type semiconductor
- semiconductor laser
- lens
- laser module
- 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.)
- Expired - Fee Related
Links
Landscapes
- Semiconductor Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は光通信用光源に関し、特に半導体レーザ（L
D）と光ファイバを効率良く結合させる機能を有するLD
モジュールに関する。The present invention relates to a light source for optical communication, and particularly to a semiconductor laser (L
LD) that has the function of efficiently coupling D) and the optical fiber
Regarding modules.
従来、LDモジュールと光ファイバとの接続形式には、
モジュールに永久固定された光ファイバの先端に取り付
けられた光コネクタにより着脱を行うピグテール形と、
光ファイバは永久固定されず光コネクタが直接着脱可能
なレセプタクルを有するコネクタ着脱形の２種類の形式
がある。従来のコネクタ着脱形LDモジュールは第２図に
示す様に、LDパッケージ３と光コネクタのフェルールが
嵌合するレセプタクル１と、LDの出射光を集束して光コ
ネクタ内の光ファイバに結合させるレンズ21と、光ファ
イバ端面からの近端反射光を抑制するため球面研磨され
たフェルール先端が直接密着する様に配置されたガラス
スペーサ４とから構成される。Conventionally, the connection type between the LD module and the optical fiber is
With a pigtail type that is attached and detached by an optical connector attached to the tip of the optical fiber permanently fixed to the module,
There are two types of connector detachable type in which an optical fiber is not permanently fixed and has a receptacle to which an optical connector can be directly attached and detached. As shown in FIG. 2, the conventional connector detachable LD module has a receptacle 1 into which an LD package 3 and a ferrule of an optical connector are fitted, and a lens that focuses the emitted light of the LD and couples it with an optical fiber in the optical connector. 2 1, and a glass spacer 4 which ferrule tip is spherical polishing to suppress near-end reflected light is placed so as to contact directly from the optical fiber end face.
また光コネクタ先端からの反射光がLDに再結合するこ
とを回避するためにガラススペーサが用いられている。
ガラススペーサの光コネクタ側の面に対して他方の面は
この面での反射光がLDに再結合しない様に斜めに研磨す
る必要がある。また、光学面以外の側面も実装上必要な
形状・寸法に加工する必要がある。この様なガラススペ
ーサは生産性が低く高価なため、従来のコネクタ着脱形
LDモジュールは低コスト化が困難であるという欠点を有
している。In addition, a glass spacer is used to prevent the reflected light from the tip of the optical connector from being recombined with the LD.
It is necessary to polish the other surface of the glass spacer on the optical connector side so that the reflected light on this surface does not recombine with the LD. In addition, it is necessary to process the side surfaces other than the optical surface into the shapes and dimensions required for mounting. Since such a glass spacer is low in productivity and expensive, the conventional connector removable type
The LD module has a drawback that it is difficult to reduce the cost.
本発明のコネクタ着脱形LDモジュールは、第１図に示
す様に、LDパッケージ３と、光コネクタのフェルールが
嵌合しその着脱が可能なレセプタクル１と、LDの出射ビ
ームを集束するためのレンズ21,球レンズ22とから構成
され、球レンズ22がレセプタクルのストッパーとして機
能し光コネクタが嵌合する際にフェルール先端がレンズ
22に密着する様にしたことを特徴とする。As shown in FIG. 1, the connector attachable / detachable LD module according to the present invention includes an LD package 3, a receptacle 1 into which a ferrule of an optical connector is fitted and which can be attached / detached, and a lens for focusing an emission beam of an LD. 2 1 and spherical lens 2 2 , the spherical lens 2 2 functions as a stopper for the receptacle, and the ferrule tip is the lens when the optical connector is fitted.
The feature is that it is closely attached to 2 2 .
PC（フィジカル・コンタクト）形コネクタをレセプタ
クル１に挿入することにより、フェルール先端と球レン
ズ22とが密着し、PC状態となり、フェルール先端での反
射が抑制される。一方、球レンズ22の他方の面は球面の
ため、この面での反射光は発散しLDには再結合しない。By inserting a PC (physical contact) type connector receptacle 1, the ferrule tip and the ball lens 2 2 and is in close contact becomes a PC state, reflected in the ferrule tip is suppressed. On the other hand, the other surface of the spherical lens 2 2 because of spherical, not recombine in divergent LD reflected light in this plane.
このようにして、従来、高価であったガラス・スペー
サを生産性の高い安価な球レンズに置き換えることによ
り、特性劣化なく低コスト化が図れる。In this way, by replacing the glass spacer, which has been expensive in the past, with an inexpensive spherical lens having high productivity, it is possible to reduce the cost without deteriorating the characteristics.
第３図は本発明の実施例の構造を示す断面図である。 FIG. 3 is a sectional view showing the structure of the embodiment of the present invention.
貫通穴に内接して低融点ガラスで固定した球レンズ
22,23を保持するレンズホルダ５とレセプタクル１とが
ネジで固定されている。LDパッケージ３はレセプタクル
１に挿入される光コネクタの光ファイバに対し光軸調整
された後、レンズホルダ５にYAGレーザによるスポット
溶接により固定される。実験例では球レンズ22とPCコネ
クタ先端の密着部における反射は、反射減衰量で35dB以
上あり、実用上充分小さいことが確認された。Spherical lens inscribed in the through hole and fixed with low melting point glass
The lens holder 5 for holding 2 2 and 2 3 and the receptacle 1 are fixed by screws. After the optical axis of the LD package 3 is adjusted with respect to the optical fiber of the optical connector inserted in the receptacle 1, the LD package 3 is fixed to the lens holder 5 by spot welding with a YAG laser. Reflection at the adhesion portion of the spherical lens 2 2 and the PC connector tip in Experimental Example is located above 35dB in return loss, it practically sufficiently small has been confirmed.
以上説明したように本発明は、コネクタを直接着脱で
きるレセプタクルのストッパーとして球レンズを用いる
ことにより、単純な構成でコネクタ着脱形LDモジュール
が実現できる。従来の研磨コストが高いガラススペーサ
の代わりに、生産性の高い安価な球レンズを用いるた
め、コネクタ着脱形LDモジュールの低コスト化の効果が
ある。従って、本発明は特に低コスト化の要求が厳しい
加入者系システム向のLDモジュールに有効である。As described above, according to the present invention, a connector attachable / detachable LD module can be realized with a simple configuration by using a spherical lens as a stopper of a receptacle in which a connector can be directly attached / detached. Since an inexpensive spherical lens with high productivity is used instead of the conventional glass spacer with high polishing cost, there is an effect of reducing the cost of the connector detachable LD module. Therefore, the present invention is particularly effective for the LD module for the subscriber system, which is particularly required to reduce the cost.
第１図は本発明の基本構成を示す断面図、第２図は従来
のモジュールの基本構成を示す断面図、第３図は本発明
の一実施例の構造を示す断面図である。 １……レセプタクル、21……レンズ、22,23……球レン
ズ、３……LDパッケージ、４……ガラス・スペーサ、５
……レンズホルダ。FIG. 1 is a sectional view showing the basic structure of the present invention, FIG. 2 is a sectional view showing the basic structure of a conventional module, and FIG. 3 is a sectional view showing the structure of an embodiment of the present invention. 1 …… Receptacle, 2 1 …… Lens, 2 2 , 2 3 …… Spherical lens, 3 …… LD package, 4 …… Glass spacer, 5
...... Lens holder.
Claims (1)
ードパッケージと、 前記レーザダイオードからの出射ビームを集束する少な
くとも１個のレンズと、 光ファイバを収容するフェルールを先端に有する外部の
コネクタの前記フェルールに嵌合し、前記コネクタを着
脱可能なレセプタクルを備え、 前記レンズのうち１個が球レンズであり、 該球レンズはその表面近傍で前記出射ビームを集光する
とともに、 前記コネクタが前記レセプタクルに装着されたときに、
前記光ファイバの先端に密着する位置に配置されている
ことを特徴とするコネクタ着脱形半導体レーザモジュー
ル。1. A laser diode package for accommodating a laser diode, at least one lens for converging a beam emitted from the laser diode, and a ferrule for accommodating an optical fiber, which is fitted to the ferrule of an external connector. And a connector to which the connector can be attached and detached, one of the lenses is a spherical lens, the spherical lens condenses the outgoing beam near the surface thereof, and the connector is mounted on the receptacle. When
A detachable connector type semiconductor laser module, which is arranged at a position in close contact with the tip of the optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1208262A JP2680898B2 (en) | 1989-08-11 | 1989-08-11 | Detachable connector type semiconductor laser module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1208262A JP2680898B2 (en) | 1989-08-11 | 1989-08-11 | Detachable connector type semiconductor laser module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0371103A JPH0371103A (en) | 1991-03-26 |
| JP2680898B2 true JP2680898B2 (en) | 1997-11-19 |
Family
ID=16553329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1208262A Expired - Fee Related JP2680898B2 (en) | 1989-08-11 | 1989-08-11 | Detachable connector type semiconductor laser module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2680898B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001281501A (en) | 2000-03-30 | 2001-10-10 | Fujitsu Ltd | Laser diode module and its assembling method |
| US7298942B2 (en) * | 2003-06-06 | 2007-11-20 | Finisar Corporation | Pluggable optical optic system having a lens fiber stop |
| KR100746259B1 (en) * | 2007-01-30 | 2007-08-03 | (주)디나옵틱스 | Receptacle for transmitter/receiver optical sub assembly of transceiver, and apparatus and method for manufacturing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59149310A (en) * | 1983-02-15 | 1984-08-27 | Seiko Instr & Electronics Ltd | Optical fiber coupling device |
| JPS62177506A (en) * | 1986-01-31 | 1987-08-04 | Fujitsu Ltd | Optical coupling device |
| JPS6323118A (en) * | 1986-03-25 | 1988-01-30 | Canon Inc | Distributed index lens |
-
1989
- 1989-08-11 JP JP1208262A patent/JP2680898B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0371103A (en) | 1991-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |