JPS62248280A - Arrangement for fixing optical fiber in laser diode module - Google Patents
Arrangement for fixing optical fiber in laser diode moduleInfo
- Publication number
- JPS62248280A JPS62248280A JP9175286A JP9175286A JPS62248280A JP S62248280 A JPS62248280 A JP S62248280A JP 9175286 A JP9175286 A JP 9175286A JP 9175286 A JP9175286 A JP 9175286A JP S62248280 A JPS62248280 A JP S62248280A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- laser diode
- bearing section
- cylindrical bearing
- optical
- 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 title claims abstract description 39
- 125000006850 spacer group Chemical group 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 abstract description 11
- 239000000758 substrate Substances 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はレーザダイオードモジュールの光ファイバ固定
ａ造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical fiber fixing structure of a laser diode module.
［従来の技術］
光ファイバ通信において光ファイバにシングルモードフ
ァイバ（以下ＳＭＦと略する）を使用り゛ることは伝送
容量の増大をもたらずので近年実用化が進展しつつある
。[Prior Art] The use of single mode fibers (hereinafter abbreviated as SMF) as optical fibers in optical fiber communication does not result in an increase in transmission capacity, and has been put into practical use in recent years.
レーザダイオード素子とＳＭＦを光学結合したモジュー
ルにおいて、ＳＭＦのコア径が約１０μ（レーザ波長１
．３μｍの時）と非常に小さいので、光ファイバのレー
雪ア素子に対する光軸ズレがわずかに生じてもファイバ
光出力の大幅な低下をもたらすことになる。In a module in which a laser diode element and an SMF are optically coupled, the core diameter of the SMF is approximately 10μ (laser wavelength 1
．． 3 μm), which is very small, so even a slight deviation of the optical axis of the optical fiber with respect to the laser element will result in a significant decrease in the fiber light output.
過剰結合損失０．５ｄＢで許容されるファイバの光軸ズ
レは、その光学系にもにるが、通常は１ｎ前後であり、
温度サイクル等の環境試験にス・１して光軸ズレが極小
となるように設計しなければならない。The allowable optical axis misalignment of a fiber with an excess coupling loss of 0.5 dB depends on the optical system, but is usually around 1n.
It must be designed to minimize optical axis deviation by subjecting it to environmental tests such as temperature cycling.
従来、この種のレーザダイオードモジュールにおいては
光ファイバの端末部はＸ、Ｙ、Ｚ３方向の光軸調整後、
モジュール本体のビーム出射］］に取付けた円筒軸受部
に５ｎ−Ｐｂ半田で固定されるのが一般的である。Conventionally, in this type of laser diode module, the end of the optical fiber is adjusted in three directions: X, Y, and Z.
It is generally fixed with 5n-Pb solder to a cylindrical bearing attached to the beam output section of the module body.
通常光ファイバを円筒軸受部に挿通したまま、光軸調整
か行なわれるから、円筒軸受部の内径は光ファイバの外
径より余裕をもって大きくしてあり、軸受部と光ファイ
バとの間にはかなり大きな隙間がおる。Normally, the optical axis is adjusted while the optical fiber is inserted through the cylindrical bearing, so the inner diameter of the cylindrical bearing is made larger than the outer diameter of the optical fiber, and there is a considerable distance between the bearing and the optical fiber. There's a big gap.
［発明か解決しようとする問題点］
従来、軸受部と光ファイバとの間に大ぎな隙間かあるた
めに、半田に応力が作用しやすく、周知のように半田は
応力の存在下でクリープ現象を起こし、このため結果的
にファイバ位置変位が生じ光出力が低下するという欠点
がある。[Problem to be solved by the invention] Conventionally, since there is a large gap between the bearing and the optical fiber, stress tends to act on the solder, and as is well known, the solder exhibits a creep phenomenon in the presence of stress. This has the drawback that the fiber position is displaced as a result, resulting in a decrease in optical output.
本発明の目的は光ファイバの位置ズレをなくした固定構
造を提供することにある。An object of the present invention is to provide a fixing structure that eliminates misalignment of optical fibers.
［問題点を解決するための手段］
本発明はモジュール本体の円筒軸受部内に挿通した光フ
ァイバと、レーＩアダイオードと、詠し−ｌアダイオー
ドから出側される光ビームを前記光ファイバに入射ざぜ
るレンズ系とを有するレーデダイオードモジュールにお
いて、前記円筒軸受部にリング状スペーサを取付け、該
スペーサに前記光ファイバの端末を嵌合保持させたこと
を特徴とするレーザダイオ−ドロジュールの光ファイバ
固定構造である。[Means for Solving the Problems] The present invention includes an optical fiber inserted into a cylindrical bearing portion of a module main body, a laser diode, and a light beam emitted from the laser diode to the optical fiber. A laser diode module having a lens system for diffusing incidence, characterized in that a ring-shaped spacer is attached to the cylindrical bearing part, and the end of the optical fiber is fitted and held in the spacer. It has a fiber fixed structure.
［実施例１ 以下、本発明の一実施例を図により説明する。[Example 1 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
ところで、最近に４１つてレーク“ビーム（例えばＹ
Ａ Ｇレーリ′）を用いて、部材を溶接、固定する方法
が提唱されており、徐々に実用化されつつある。レーザ
溶接の場合は、被固定物同士を直接溶融、接合するので
、半田を用いた場合に比ｌ〈で位置変位は著しく小さく
、実質的に問題にはならない。そこで、本発明はレーザ
溶接を利用して各構成部品を接合可能ならしめた光ファ
イバの固定構造としたものである。すなわち、第１図に
おいて、レーザダイオード素子］と屈折率分布型ロッド
レンズ２とは光軸を一致させて金属基板８上に搭載され
ている。ざらに該金属基板８は電子冷却器（ペルチェ）
９を介してデュアルインライン型のパッケージ３に搭載
されている。パッケージ３のビーム出射口３ａには円筒
状の軸受部４が取り付番ノられている。軸受部４の軸中
心位置はほぼレーザダイオード素子１とロッドレンズ２
との光軸と一致する位置に設計される。−５第２図に示
すように光ファイバ６は中心に光ファイバ素線５を有し
その素線５の外周はガラスフェルール５ａで被覆され、
その端末は金属パイプ５ｂで被覆される。By the way, recently 41 rake beams (for example Y
A method of welding and fixing parts using AG Rayleigh') has been proposed, and is gradually being put into practical use. In the case of laser welding, the objects to be fixed are directly melted and joined, so the positional displacement is extremely small compared to when solder is used, and there is no substantial problem. Therefore, the present invention provides an optical fiber fixing structure in which each component can be joined using laser welding. That is, in FIG. 1, the laser diode element and the gradient index rod lens 2 are mounted on a metal substrate 8 with their optical axes aligned. Roughly, the metal substrate 8 is an electronic cooler (Peltier).
It is mounted in a dual inline type package 3 via 9. A cylindrical bearing portion 4 is attached to the beam exit port 3a of the package 3. The axis center position of the bearing part 4 is approximately between the laser diode element 1 and the rod lens 2.
It is designed in a position that coincides with the optical axis of the -5 As shown in FIG. 2, the optical fiber 6 has an optical fiber strand 5 at the center, and the outer periphery of the strand 5 is covered with a glass ferrule 5a.
Its end is covered with a metal pipe 5b.
ざらに、本発明は光ファイバ５を光ビームと同軸上に位
置させて支持するリング状スペーサ７を備えている。リ
ング状スペーサ７は光ファイバ５を嵌合する筒部７ａと
、筒部７ａの口縁に設けたフランジ１ｂとからなる。In general, the present invention includes a ring-shaped spacer 7 that supports the optical fiber 5 coaxially with the light beam. The ring-shaped spacer 7 includes a cylindrical portion 7a into which the optical fiber 5 is fitted, and a flange 1b provided at the edge of the cylindrical portion 7a.
実施例において、レーザダイオード素子１を発掘ざけて
その光ビームを光ファイバ端末部に大割させ、その入射
光出力が最大となるような位置を決定することによりレ
ーザダイオード素子１と光フフイハ６の端末とを光結合
し、この状態に光ファイバ６をヂャツク治具により保持
する。この場合パッケージの軸受部４の穴径は光ファイ
バ端末外径よりも必要とされる調整成分だけ大きく形成
されている。次に光ファイバ６端末に精度よく挿入、嵌
合したリング状スペーサ７の７ランジ７ｂを軸受部４に
、またスペーサ７の筒部１ａと光ファイバ６の金属パイ
プ５ｂとを溶接箇所１０ａ、１０ｂでＹＡＧレーデに溶
接し、固定する。このようなリング状スペーサ７を用い
た構造であれば被溶接部材間（４と７あるいは６と７）
の隙間はＸ！ｌ１１１１方向ではＯ，Ｘ、Ｙ方向では部
材初期設計により小さなある一定値に制御することが可
能であり、レーザ溶接は常に一定した条件で行なうこと
ができ、安定した溶接強度を得ることができる。またレ
ーザ溶接時の位置変位も充分許容できる程度に小さく良
好な光学結合状態を１テることができる。In the embodiment, the laser diode element 1 and the optical fiber 6 are separated by excavating the laser diode element 1, dividing its light beam into the optical fiber terminal, and determining the position where the incident light output is maximized. The optical fiber 6 is optically coupled to the terminal, and the optical fiber 6 is held in this state using a jack jig. In this case, the hole diameter of the bearing portion 4 of the package is made larger than the outer diameter of the optical fiber terminal by the required adjustment component. Next, the 7 flange 7b of the ring-shaped spacer 7 that has been inserted and fitted into the terminal of the optical fiber 6 with precision is attached to the bearing part 4, and the cylindrical part 1a of the spacer 7 and the metal pipe 5b of the optical fiber 6 are welded at the welding points 10a and 10b. Weld it to the YAG wire and fix it. If the structure uses such a ring-shaped spacer 7, the space between the parts to be welded (4 and 7 or 6 and 7)
The gap is X! In the 1111 direction, the O, X, and Y directions can be controlled to a small constant value by the initial design of the member, so laser welding can always be performed under constant conditions, and stable welding strength can be obtained. Further, the positional displacement during laser welding is sufficiently small to an allowable extent, and a good optical coupling state can be maintained.
尚、本発明はレーザダイオードモジュールに限らずＬＥ
Ｄモジュール、受光素子モジュールにも適用できること
は明らかである。Note that the present invention is applicable not only to laser diode modules but also to LE
It is clear that the present invention can also be applied to the D module and the light receiving element module.
［発明の効果］
以上説明したように本発明は円筒軸受部と光ファイバと
の間にリング状スペー丈を設け、該スペーサにより光フ
ァイバを円筒軸受部に支持させたので、一定のＹＡＧレ
ーザ溶接で溶接して各構成部品を接合することができ、
しかも経時的に安定なレーザダイオードモジュールの光
ファイバ固定構造か得られ、その工業的効果は大きいも
のである。[Effects of the Invention] As explained above, in the present invention, a ring-shaped space is provided between the cylindrical bearing and the optical fiber, and the optical fiber is supported by the cylindrical bearing by the spacer. Each component can be joined by welding,
Furthermore, an optical fiber fixing structure for a laser diode module that is stable over time can be obtained, and its industrial effects are great.
第１図は本発明の一実施例を示す断面図、第２図は第１
図のＡ部拡大図でおる。
１・・・シー１１ダイオード素子
２・・・屈折率分布型ロッドレンズ
３・・・モジュールパッケージ
４・・・−Ｅジュールパッケージの円筒軸受部５・・・
光ファイバ索線
６・・・光ファイバ
７・・・リング状スペーサFIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
This is an enlarged view of part A in the figure. 1... Sea 11 Diode element 2... Gradient index rod lens 3... Module package 4... Cylindrical bearing part 5 of the -E Joule package...
Optical fiber cable 6...Optical fiber 7...Ring-shaped spacer
Claims (1)
イバと、レーザダイオードと、該レーザダイオードから
出射される光ビームを前記光ファイバに入射させるレン
ズ系とを有するレーザダイオードモジュールにおいて、
前記円筒軸受部にリング状スペーサを取付け、該スペー
サに前記光ファイバの端末を嵌合保持させたことを特徴
とするレーザダイオードモジュールの光ファイバ固定構
造。(1) A laser diode module including an optical fiber inserted into a cylindrical bearing part of a module main body, a laser diode, and a lens system that makes a light beam emitted from the laser diode enter the optical fiber,
An optical fiber fixing structure for a laser diode module, characterized in that a ring-shaped spacer is attached to the cylindrical bearing part, and the end of the optical fiber is fitted and held in the spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9175286A JPS62248280A (en) | 1986-04-21 | 1986-04-21 | Arrangement for fixing optical fiber in laser diode module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9175286A JPS62248280A (en) | 1986-04-21 | 1986-04-21 | Arrangement for fixing optical fiber in laser diode module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62248280A true JPS62248280A (en) | 1987-10-29 |
Family
ID=14035268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9175286A Pending JPS62248280A (en) | 1986-04-21 | 1986-04-21 | Arrangement for fixing optical fiber in laser diode module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62248280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020467A1 (en) * | 1992-04-02 | 1993-10-14 | Fujitsu Limited | Optical module and manufacture thereof |
| EP1684103A2 (en) * | 2005-01-24 | 2006-07-26 | Emcore Corporation | Coaxial cooled laser modules with integrated thermal electric cooler and optical components |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59135415A (en) * | 1982-09-29 | 1984-08-03 | ザゼネラルエレクトリツクカンパニ−，ピ−・エル・シ−・ | Optical coupler and assembly thereof |
-
1986
- 1986-04-21 JP JP9175286A patent/JPS62248280A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59135415A (en) * | 1982-09-29 | 1984-08-03 | ザゼネラルエレクトリツクカンパニ−，ピ−・エル・シ−・ | Optical coupler and assembly thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020467A1 (en) * | 1992-04-02 | 1993-10-14 | Fujitsu Limited | Optical module and manufacture thereof |
| US5386488A (en) * | 1992-04-02 | 1995-01-31 | Fujitsu Limited | Optical module and manufacturing method therefor |
| EP1684103A2 (en) * | 2005-01-24 | 2006-07-26 | Emcore Corporation | Coaxial cooled laser modules with integrated thermal electric cooler and optical components |
| EP1684103A3 (en) * | 2005-01-24 | 2006-11-15 | Emcore Corporation | Coaxial cooled laser modules with integrated thermal electric cooler and optical components |
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