JP3130149B2 - Optical fiber coupling device - Google Patents
Optical fiber coupling deviceInfo
- Publication number
- JP3130149B2 JP3130149B2 JP04315552A JP31555292A JP3130149B2 JP 3130149 B2 JP3130149 B2 JP 3130149B2 JP 04315552 A JP04315552 A JP 04315552A JP 31555292 A JP31555292 A JP 31555292A JP 3130149 B2 JP3130149 B2 JP 3130149B2
- Authority
- JP
- Japan
- Prior art keywords
- holder
- optical fiber
- ferrule
- coupling device
- welded
- 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
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は光ファイバの結合装置に
関し、更に詳しくは光ファイバの光学系本体への取り付
けが容易な光ファイバ結合装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber coupling device, and more particularly, to an optical fiber coupling device in which an optical fiber can be easily attached to an optical system body.
【０００２】[0002]
【従来の技術】光通信には、半導体レーザ等の発光素子
及びは受光素子と光ファイバを結合する手段が不可欠で
あり、半導体レーザと光ファイバを結合して一体化した
モジュールが使用されている。このような結合手段の組
み立てには極めて高い精度が要求されており、光ファイ
バはフェルールの内孔に強固に支持され、光ファイバの
所定の内端位置及び角度の精密な設定後にフェルールは
レーザ装置の金属ハウジングに溶接で固定された光学ホ
ルダーに溶接される。2. Description of the Related Art In optical communication, means for connecting a light emitting element such as a semiconductor laser and a light receiving element to an optical fiber is indispensable, and a module in which a semiconductor laser and an optical fiber are connected and integrated is used. . Extremely high precision is required for assembling such coupling means, the optical fiber is firmly supported in the inner hole of the ferrule, and after the optical fiber is precisely set to a predetermined inner end position and angle, the ferrule is connected to the laser device. Welded to an optical holder fixed by welding to a metal housing.
【０００３】図２は例えば特開平１−１４５６０８号に
記載されているような従来の光ファイバ結合装置の典型
的な例を示し、レーザ光を発生する光素子（あるいは受
光素子）とレンズ等の光学系本体をステンレス鋼等の金
属製ハウジング１に収容し、軸孔に光ファイバ４を保持
したステンレス鋼等の金属製管状フェルール３を、ステ
ンレス鋼等の金属製環状ホルダ６にレーザ溶接による溶
接点または線２を介して固定し、ホルダ６をレーザ溶接
による溶接点または線５を介してハウジング１に溶接固
定する。適正な光結合を行うためには溶接に先立って光
ファイバ先端が光学系本体光に対して所定の向き及び位
置に固定され、また外力に対して機械的に安定であるよ
うに各部材の位置決めと固定が正しくなされなければな
らない。図２のような溶接方法ではフェルールとホルダ
の溶接が軸線に直角な同一の平面内で数カ所または円周
に沿って形成されているために、溶接個所を軸にする振
動が生じたり一か所でも不良があると光ファイバ軸線に
直角な方向にずれが生じて光結合特性に大きな影響が生
じる。この問題は、実開平３−９２６１０号のようにフ
ェルールをホルダの溶接個所を軸線に直角な２つの面内
で等間隔で行うことにより回避することができる。FIG. 2 shows a typical example of a conventional optical fiber coupling device as described in, for example, Japanese Patent Application Laid-Open No. 1-145608, in which an optical element (or light receiving element) for generating laser light and a lens and the like are provided. The optical system body is housed in a metal housing 1 made of stainless steel or the like, and a metal tubular ferrule 3 made of stainless steel or the like holding an optical fiber 4 in a shaft hole is welded to a metal annular holder 6 made of stainless steel or the like by laser welding. The holder 6 is fixed via the point or the line 2 and the holder 6 is fixed to the housing 1 via a welding point or the line 5 by laser welding. Prior to welding, the tip of the optical fiber is fixed in a predetermined direction and position with respect to the light of the optical system main body, and the positioning of each member is mechanically stable against external force. And fixation must be done correctly. In the welding method as shown in FIG. 2, since the welding of the ferrule and the holder is formed in several places or along the circumference in the same plane perpendicular to the axis, vibration about the welding point occurs or one place. However, if there is a defect, a shift occurs in a direction perpendicular to the optical fiber axis, and the optical coupling characteristics are greatly affected. This problem can be avoided by performing ferrule welding at equal intervals in two planes perpendicular to the axis, as in Japanese Utility Model Laid-Open No. 3-92610.
【０００４】[0004]
【発明が解決しようとする課題】実開平３−９２６１０
号の構造では、環状ホルダに軸線に沿って離間した２つ
の平面に沿って等間隔に３個以上の半径方向貫通孔を設
け、これらの貫通孔とフェルールが接する箇所を貫通孔
を通して溶接しかければならず、貫通孔の壁により溶接
用レーザビームの操作が制約を受け、作業が面倒となり
また時間がかかる。したがって、本発明の目的は、能率
的な溶接が可能な構造の光ファイバ結合装置を提供する
ことにある。Problems to be Solved by the Invention
In the structure of No. 3, three or more radial through holes are provided in the annular holder at equal intervals along two planes separated along the axis, and the places where these through holes and the ferrule are in contact are welded through the through holes. In addition, the operation of the laser beam for welding is restricted by the wall of the through hole, which makes the operation complicated and time-consuming. Accordingly, an object of the present invention is to provide an optical fiber coupling device having a structure that enables efficient welding.
【０００５】[0005]
【課題を解決するための手段】本発明の光ファイバ結合
装置は、光学系本体の金属ケーシングの開口部の外側に
固定された環状ホルダと、前記開口部に整列するように
してこの環状ホルダの内孔に支持された管状フェルール
と、該フェルールの軸孔に支持されそこから外側に延び
出している光ファイバよりなる光ファイバ結合装置にお
いて、前記環状ホルダは光学系本体側の内側ホルダと光
ファイバ側の外側ホルダとより構成され、前記内側ホル
ダは内側外周で前記金属ケーシングに溶接され、外側内
周で前記フェルールに溶接され、前記外側ホルダは内側
外周で前記内側ホルダーに溶接され、外側内周で前記フ
ェルールに溶接されており、前記外側ホルダは前記内側
内周から内側外周にかけた切り込みも有せず、前記内側
内周は面取りされている。好ましい形態として、さらに
前記内側ホルダの前記外側外周と、前記外側ホルダの前
記内側外周はネスト構造を有する。 An optical fiber coupling device according to the present invention is provided outside an opening of a metal casing of an optical system body.
With the fixed annular holder , aligned with the opening
And a tubular ferrule supported by the inner hole of the annular holder, and supported by the shaft hole of the ferrule and extending outward therefrom.
In the light fiber coupling device having the optical fibers out, the annular holder is more configuration as the optical system main side of the inner holder and outer holder of the optical fiber side, the inner holder is welded to the metal casing inside the outer periphery, is welded to the ferrule in a circumferential outer, the outer holder is welded to said inner holder inside periphery, is welded to the ferrule in the outer periphery, the outer holder the inner
There is no cut from the inner circumference to the inner circumference.
The inner circumference is chamfered. As a preferred form,
The outer periphery of the inner holder and the front of the outer holder
The inner periphery has a nest structure.
【０００６】本発明によれば、従来のように複雑且つ面
倒な作業によらないで所定の機械的な安定性を有する光
結合部が得られる。すなわち、溶接個所が完全に露出し
ているから、レーザ光による溶接作業が容易に実施でき
る。According to the present invention, an optical coupling portion having a predetermined mechanical stability can be obtained without using a complicated and troublesome operation as in the prior art. That is, since the welding location is completely exposed, the welding operation using the laser beam can be easily performed.
【０００７】[0007]
【実施例の説明】図１を参照して本発明の実施例による
光ファイバ結合装置の実施例を説明する。レーザ光を発
生する光素子１１（あるいは受光素子）及びレンズ系１
２はステンレス鋼等の金属製ハウジング１０に収容され
ている。１３はステンレス鋼製の環状ホルダである。環
状ホルダ１３は、光学系本体側の内側ホルダ１４と光フ
ァイバ側の外側ホルダ１５に分割されている。環状ホル
ダ１３の内孔にはステンレス鋼製の管状フェルール１６
が収容固定されている。このフェルール１６は、その軸
孔に光ファイバ１７を固定的に収容している。なお光フ
ァイバ１７は一般にセラミック製ガイド（キャピラリ
ー）を有するが図では省略してある。これらの部材は所
定の位置決めの後にレーザ光線により小円で示した溶接
点または線で互いに溶接されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical fiber coupling device according to an embodiment of the present invention will be described with reference to FIG. Optical element 11 (or light receiving element) for generating laser light and lens system 1
2 is accommodated in a metal housing 10 such as stainless steel. Reference numeral 13 denotes an annular holder made of stainless steel. The annular holder 13 is divided into an inner holder 14 on the optical system main body side and an outer holder 15 on the optical fiber side. A tubular ferrule 16 made of stainless steel is provided in the inner hole of the annular holder 13.
Is fixedly accommodated. The ferrule 16 has an optical fiber 17 fixedly housed in its axial hole. The optical fiber 17 generally has a ceramic guide (capillary), but is omitted in the figure. These parts are welded to each other at predetermined welding positions or lines indicated by small circles by a laser beam after predetermined positioning.
【０００８】環状ホルダ１３のうち、内側ホルダ１４の
外側外周は小径部１８を有し、一方外側ホルダ１５はこ
の小径部と嵌合する環状凹所１９を有する。このため内
側及び外側ホルダはネスト構造となって組立の際に相互
の位置決めを容易にしている。更に外側ホルダ１３の内
側内周は溶接部を逃げるためのテーパ面２０ないし面取
りを有する。[0008] Of the annular holder 13, the outer periphery of the inner holder 14 has a small-diameter portion 18, while the outer holder 15 has an annular recess 19 fitted with the small-diameter portion. For this reason, the inner and outer holders have a nest structure to facilitate mutual positioning during assembly. Further, the inner inner periphery of the outer holder 13 has a tapered surface 20 or chamfer for escaping the weld.
【０００９】組み立てに当たり、まずフェルール１６と
内側ホルダ１４とを嵌合した状態で光学系本体に対して
適正な位置決めをし、次いで両部材の接触線に沿った全
周または等間隔の３か所以上にレーザ光ビームを当てて
溶接して溶接点Ａを形成することにより両部材を固定す
る。次に外側ホルダ１５を組み込んで溶接点Ｂ及びＣで
同様に溶接することにより、内側ホルダ１４と外側ホル
ダ１５間、及び外側ホルダ１５とフェルール１６間を溶
接一体化する。最後に内側ホルダ１４をハウジング１０
に溶接して、光結合手段の取り付けを終了する。In assembling, first, the ferrule 16 and the inner holder 14 are fitted to each other, and the proper positioning is performed with respect to the optical system main body. As described above, both members are fixed by forming a welding point A by applying a laser beam and welding. Next, the outer holder 15 is incorporated and similarly welded at the welding points B and C, whereby the inner holder 14 and the outer holder 15 and the outer holder 15 and the ferrule 16 are integrated by welding. Finally, the inner holder 14 is attached to the housing 10.
To complete the mounting of the optical coupling means.
【００１０】[0010]
【発明の効果】以上のように、本発明によると、溶接は
邪魔のない露出箇所に対して実行でき、先の実開平３−
９２６１０号の溶接方法では得れれなかった迅速な取り
付け作業が実施できると同時に、軸線に沿った２平面で
の溶接により振動等の影響を受けない機械的に強固な固
定が可能となる。As described above, according to the present invention, welding can be performed at an undisturbed exposed portion.
A quick mounting operation, which could not be obtained by the welding method of No. 92610, can be carried out, and at the same time, a mechanically strong fixing which is not affected by vibration or the like can be performed by welding on two planes along the axis.
【図１】本発明の光ファイバ結合装置の断面図である。FIG. 1 is a sectional view of an optical fiber coupling device according to the present invention.
【図２】従来の光ファイバ結合装置の断面図である。FIG. 2 is a sectional view of a conventional optical fiber coupling device.
１０：ハウジング １１：光素子 １２：レンズ系 １３：環状ホルダ １４：内側ホルダ １５：外側ホルダ １６：管状フェルール １７：光ファイバ １８：小径部 １９：環状凹所 ２０：テーパ面 Ａ、Ｂ、Ｃ、Ｄ：溶接線または点 10: Housing 11: Optical element 12: Lens system 13: Annular holder 14: Inner holder 15: Outer holder 16: Tubular ferrule 17: Optical fiber 18: Small diameter portion 19: Annular recess 20: Tapered surface A, B, C, D: welding line or point
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 国際公開93／20467（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 6/24 - 6/42 ────────────────────────────────────────────────── ─── Continued on the front page (56) References WO 93/20467 (WO, A1) (58) Fields surveyed (Int. Cl. 7 , DB name) G02B 6/24-6/42
Claims (2)
外側に固定された環状ホルダと、前記開口部に整列する
ようにしてこの環状ホルダの内孔に支持された管状フェ
ルールと、該フェルールの軸孔に支持されそこから外側
に延び出している光ファイバよりなる光ファイバ結合装
置において、前記環状ホルダは光学系本体側の内側ホル
ダと光ファイバ側の外側ホルダとより構成され、前記内
側ホルダは内側外周で前記金属ケーシングに溶接され、
外側内周で前記フェルールに溶接され、前記外側ホルダ
は内側外周で前記内側ホルダーに溶接され、外側内周で
前記フェルールに溶接されており、前記外側ホルダは前
記内側内周から内側外周にかけた切り込みも有せず、前
記内側内周は面取りされている光ファイバ結合装置。1. An optical system body comprising :
An annular holder fixed outside and aligned with the opening
In to a tubular ferrule which is supported in the inner hole of the annular holder, an outer therefrom are supported by the shaft hole of the ferrule as
In the optical fiber coupling device consisting of an optical fiber that extends out into the annular holder is more configured inner holder and outer holder of the optical fiber side of the optical system main body, the inner <br/> side holder on the inside periphery Welded to the metal casing ,
Is welded to the ferrule in a circumferential outer, the outer holder is welded to said inner holder inside periphery, is welded on the outside inner peripheral to said ferrule, said outer holder before
There is no cut from the inner inner circumference to the inner outer circumference.
The inner circumference is an optical fiber coupling device that is chamfered .
外側ホルダの前記内側外周はネスト構造を有する請求項
１の光ファイバ結合装置。 2. An outer periphery of the inner holder,
The optical fiber coupling device according to claim 1 , wherein the inner outer periphery of the outer holder has a nest structure .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04315552A JP3130149B2 (en) | 1992-11-02 | 1992-11-02 | Optical fiber coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04315552A JP3130149B2 (en) | 1992-11-02 | 1992-11-02 | Optical fiber coupling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06148450A JPH06148450A (en) | 1994-05-27 |
| JP3130149B2 true JP3130149B2 (en) | 2001-01-31 |
Family
ID=18066722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04315552A Expired - Fee Related JP3130149B2 (en) | 1992-11-02 | 1992-11-02 | Optical fiber coupling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3130149B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415664A (en) * | 2020-12-03 | 2021-02-26 | 四川光恒通信技术有限公司 | Novel four-piece coupling table of optical path relay type device and use method thereof |
-
1992
- 1992-11-02 JP JP04315552A patent/JP3130149B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06148450A (en) | 1994-05-27 |
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