JPH04349406A - Method for fixing optical circuit component - Google Patents
Method for fixing optical circuit componentInfo
- Publication number
- JPH04349406A JPH04349406A JP12360191A JP12360191A JPH04349406A JP H04349406 A JPH04349406 A JP H04349406A JP 12360191 A JP12360191 A JP 12360191A JP 12360191 A JP12360191 A JP 12360191A JP H04349406 A JPH04349406 A JP H04349406A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- fixing
- optical axis
- optical circuit
- circuit component
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims description 20
- 239000000853 adhesive Substances 0.000 claims abstract description 18
- 230000001070 adhesive effect Effects 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000000835 fiber Substances 0.000 abstract description 15
- 239000013307 optical fiber Substances 0.000 abstract description 9
- 239000000758 substrate Substances 0.000 abstract description 6
- 239000010453 quartz Substances 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、光通信、光計測等に利
用する光結合系を構成する光回路部品を、固定する光回
路部品の固定方法に関する。特に、溶接或いは固定の際
に、その光軸のずれを少なくして光回路系の結合損失を
低減し、更に、外部環境の変化に対して安定性が高い光
回路部品の固定方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing optical circuit components constituting an optical coupling system used for optical communication, optical measurement, etc. In particular, the present invention relates to a method for fixing optical circuit components that reduces optical axis deviation during welding or fixing, reduces coupling loss in an optical circuit system, and is highly stable against changes in the external environment.
【０００２】0002
【従来の技術】従来、光通信、光計測等に利用する光結
合系を構成する光回路部品を、固定する場合に、図３又
は図４に示すように、レンズ対レンズを光結合するもの
である。図において、１は光ファイバ−の心線で、２は
光ファイバ−の素線であり、３は集光レンズで、４は金
属製（例えばステンレス製）円筒であり、５は金属製（
例えばステンレス製）ファイバ−コリメ−タ固定柱であ
り、６は金属製（例えばステンレス製）基板であり、７
は樹脂接着剤で、８は固定箇所を示す。[Prior Art] Conventionally, when fixing optical circuit components constituting an optical coupling system used for optical communication, optical measurement, etc., a lens-to-lens optical coupling system is used, as shown in FIG. 3 or 4. It is. In the figure, 1 is the core of the optical fiber, 2 is the strand of the optical fiber, 3 is the condensing lens, 4 is a metal (for example, stainless steel) cylinder, and 5 is the metal (for example, stainless steel) cylinder.
6 is a metal (for example, stainless steel) substrate; 7 is a fiber collimator fixing column (made of stainless steel, for example);
is the resin adhesive, and 8 indicates the fixing location.
【０００３】図３は、光結合部品を固定する部位の断面
形状が円、矩形若しくは任意形状で凹状の溝、又は貫通
孔で、固定に有機接着剤を用いた例である。ファイバ−
コリメ−タとファイバ−コリメ−タ固定柱との固定部の
間隙に有機接着剤を充填し、硬化させることで固定が行
なわれる。ところが、この固定方法で使用される有機接
着剤は通常、粘性が高い液体であるため固定部の間隙へ
の充填が不均一になり易く、硬化した後の硬度、温度に
対する膨張度、硬度などの物性値が固定部の各所で等し
くならない。この状態で環境の変化、特に温度変化が生
じると固定部の各所で接着剤が不均一に変形し、ファイ
バ−コリメ−タの光軸ずれが生じて結合損失が増大して
しまう欠点があった。FIG. 3 shows an example in which the cross-sectional shape of the part to which the optical coupling component is fixed is circular, rectangular, or arbitrary, with a concave groove or through hole, and an organic adhesive is used for fixing. fiber
Fixation is performed by filling an organic adhesive into the gap between the fixing portion of the collimator and the fiber collimator fixing column and curing it. However, since the organic adhesive used in this fixing method is usually a highly viscous liquid, it tends to fill the gaps in the fixing part unevenly, and the hardness after curing, expansion rate with respect to temperature, hardness, etc. The physical property values are not equal at various locations on the fixed part. In this state, if there is a change in the environment, especially a change in temperature, the adhesive deforms unevenly in various parts of the fixed part, causing optical axis misalignment of the fiber collimator and increasing coupling loss. .
【０００４】図４は、光結合部品を固定する部位の断面
形状が円、矩形若しくは任意の形状であり、凹状の溝又
は貫通孔により、光結合部品の固定をし、その固着に溶
接を用いた例である。ファイバ−コリメ−タとファイバ
−コリメ−タ固定柱とを溶接により固定するものである
。ところが、ファイバ−コリメ−タとファイバ−コリメ
−タ固定柱との固定部の間隙が、溶接箇所によって異な
るため、溶接の凝固の時及び室温までの冷却期間に起こ
る金属の収縮によって、溶接変形が生じ、それが溶接箇
所で異なり、ファイバ−コリメ−タの光軸ずれが生じて
結合損失が増大してしまう問題があった。FIG. 4 shows a case where the cross-sectional shape of the part to which the optical coupling component is fixed is circular, rectangular, or any shape, the optical coupling component is fixed by a concave groove or through hole, and welding is used for the fixation. This is an example. The fiber collimator and the fiber collimator fixing column are fixed by welding. However, because the gap between the fiber collimator and the fiber collimator fixing column differs depending on the welding location, welding deformation occurs due to metal contraction that occurs during weld solidification and during the cooling period to room temperature. There is a problem in that this difference occurs depending on the welding location, and the optical axis of the fiber collimator shifts, resulting in an increase in coupling loss.
【０００５】[0005]
【発明が解決しようとする課題】従って、本発明者らは
、前記のように、従来の固定方法で生じる、光結合部品
を固定する部位の形状に起因する固定の際の光軸のずれ
、外部環境特に、温度、湿度の変化による光軸のずれを
低減せしめ、光結合系の結合損失を少なくする固定方法
を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, as mentioned above, the present inventors have solved the problem of the deviation of the optical axis during fixation due to the shape of the part to which the optical coupling component is fixed, which occurs in the conventional fixing method. It is an object of the present invention to provide a fixing method that reduces optical axis deviation due to changes in the external environment, particularly temperature and humidity, and reduces coupling loss of an optical coupling system.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記の技術的
な課題の解決のために、光結合系を構成する各光回路部
品を樹脂接着剤若しくは溶接により固定する光回路部品
の固定方法において、該光回路部品が、一部若しくは全
体を保持するための構造体を介して、固定し、該構造体
と該光回路部品との固定部の形状が、精度の良い曲率を
有する球面で構成され、その球面を通して、固定するこ
とを特徴とする前記光回路部品の固定方法である。[Means for Solving the Problems] In order to solve the above-mentioned technical problems, the present invention provides a method for fixing optical circuit components in which each optical circuit component constituting an optical coupling system is fixed by resin adhesive or welding. The optical circuit component is fixed via a structure for holding a part or the whole, and the shape of the fixing part between the structure and the optical circuit component is a spherical surface having a precise curvature. The method for fixing an optical circuit component is characterized in that fixing is performed through the spherical surface of the optical circuit component.
【０００７】[0007]
【作用】本発明によると、先ず、光回路部品が保持され
た構造体と該固定されるべき光回路部品との固定部を、
精度の良い曲率を有する球面をなすようにし、それによ
り、固定すべき光回路部品との間の間隙を、非常に小さ
くでき、しかも、間隙を一定にしたまま光結合系の光軸
の調整を行なうことができる。図２は、間隙を一定にし
たまま光結合系の光軸の調整方法を示しており、光軸の
ずれに対して、第１のコリメ−タを固定した構造体を中
心にして、第２のコリメ−タを固定した構造体をコリメ
−タ間の距離を半径とする円周方向に移動することによ
り、調整することができる。また、光軸折れに対しては
、コリメ−タを固定した構造体を、固定すべき光結合系
との固定表面内で回動することにより、調整することが
できる。[Operation] According to the present invention, first, the fixing portion between the structure holding the optical circuit component and the optical circuit component to be fixed is fixed.
By forming a spherical surface with a highly accurate curvature, the gap between the optical circuit components to be fixed can be made extremely small, and the optical axis of the optical coupling system can be adjusted while keeping the gap constant. can be done. Figure 2 shows a method of adjusting the optical axis of the optical coupling system while keeping the gap constant. Adjustment can be made by moving the structure to which the collimators are fixed in the circumferential direction with the distance between the collimators as the radius. Further, optical axis bending can be adjusted by rotating the structure to which the collimator is fixed within the fixed surface of the optical coupling system to be fixed.
【０００８】そして、構造体の固定表面と、基板の固定
表面の限界表面張力を等しくしておき、間隙に接着剤を
数滴たらすと、接着剤の流動性により、固定表面にそっ
て均一流れ、その間隙に均一に充填される。これにより
、外部の環境の変化、特に、湿度、温度の変化に対して
、固定表面部の各所での樹脂接着剤の不均一性が生じる
ことによる変形がなくなり、光軸ずれが小さくなる。
また、固定部の間隙の位置による差がほとんどないので
、溶接で固定した場合には、溶接した後の溶接変形の不
均一がなくなり、光軸ずれが小さく、結合損失の小さい
光結合系が実現することができる。[0008] Then, when the critical surface tensions of the fixed surface of the structure and the fixed surface of the substrate are made equal, and a few drops of adhesive are dropped into the gap, the fluidity of the adhesive causes it to flow uniformly along the fixed surface. , the gap is filled uniformly. This eliminates deformation due to non-uniformity of the resin adhesive at various locations on the fixed surface portion due to changes in the external environment, particularly changes in humidity and temperature, and optical axis deviation is reduced. In addition, since there is almost no difference depending on the position of the gap between the fixed parts, when fixed by welding, there will be no uneven welding deformation after welding, and an optical coupling system with small optical axis deviation and low coupling loss will be realized. can do.
【０００９】次に、本発明を具体的に実施例により説明
するが、本発明はそれらによって限定されるものではな
い。[0009] Next, the present invention will be specifically explained using Examples, but the present invention is not limited thereto.
【００１０】0010
【実施例】図１は、本発明により、レンズ対レンズの光
結合系を固定するときの全体を示す斜視図である。１は
光ファイバ−、２は光を伝送する光ファイバ−の中心の
石英ファイバ−を示し、３は集光レンズ、４は、保持す
るための金属製（例えばステンレス製）構造体、６は金
属製（例えばステンレス製）の基板、７は樹脂接着剤を
示す。８は固定箇所となる球面を示すものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the entire lens-to-lens optical coupling system when it is fixed according to the present invention. 1 is an optical fiber, 2 is a quartz fiber at the center of the optical fiber that transmits light, 3 is a condenser lens, 4 is a metal (for example, stainless steel) structure for holding, and 6 is a metal structure. (for example, stainless steel), and 7 indicates a resin adhesive. Reference numeral 8 indicates a spherical surface serving as a fixing point.
【００１１】図示のように、精密に球面加工された金属
製の球８を成す底を有する構造体４は、その上に、光フ
ァイバ−１、光を伝送する光ファイバ−の中心の石英フ
ァイバ−２、集光レンズ３を保持する構造であり、全体
としてファイバ−コリメ−タを構成するものである。そ
して、この構造体４の球面８に対して、同じ曲率を有す
る半球状の溝或いは凹部９を有する金属製基板６を用い
る。そして、この半球状の凹部９の中に、構造体４の球
面８を嵌合される。そして、嵌合された状態で、ファイ
バ−コリメ−タの光軸の調整が行なわれる。As shown in the figure, a structure 4 having a bottom in the form of a precisely spherical metal sphere 8 is provided with an optical fiber 1, a quartz fiber at the center of the optical fiber for transmitting light. -2. It is a structure that holds the condensing lens 3, and constitutes a fiber collimator as a whole. A metal substrate 6 having a hemispherical groove or recess 9 having the same curvature as the spherical surface 8 of the structure 4 is used. Then, the spherical surface 8 of the structure 4 is fitted into this hemispherical recess 9. Then, in the fitted state, the optical axis of the fiber collimator is adjusted.
【００１２】光軸を調整した後に、その球面８と凹部９
との間隙に、数滴の接着剤をたらし、接着剤は流動性が
あるので、その間隙に均一に充填され、硬化すると、光
学系が固定される。この構造体４の球８と基板６の凹部
９とは、同じ材質を用い、固定される箇所の表面が、同
じ限界表面張力を有するようにする。この材質としては
、温度、湿度に対する変形を考慮して、ステンレスが好
適である。また、樹脂接着剤としては、シアノアルクリ
レ−ト系接着剤が好適である。After adjusting the optical axis, the spherical surface 8 and the concave portion 9 are
A few drops of adhesive is poured into the gap between the two, and since the adhesive is fluid, the gap is evenly filled, and when it hardens, the optical system is fixed. The ball 8 of the structure 4 and the recess 9 of the substrate 6 are made of the same material so that the surfaces to which they are fixed have the same critical surface tension. Stainless steel is suitable as this material in consideration of deformation due to temperature and humidity. Further, as the resin adhesive, a cyanoalkrylate adhesive is suitable.
【００１３】また、溶接により、固定を行なうことがで
きる。この場合、溶接は、ニオジウム−ＹＡＧレ−ザを
用いて、行ない、溶接条件は、レ−ザのパルス幅６ｍｓ
で、照射エネルギ−は１０Ｊ程度が好適であった。[0013] Furthermore, the fixation can be achieved by welding. In this case, welding was carried out using a Niodium-YAG laser, and the welding conditions were a laser pulse width of 6 ms.
The suitable irradiation energy was about 10 J.
【００１４】[0014]
【発明の効果】以上説明したように、本発明の光回路部
品の固定方法により、次のような顕著な技術的効果が得
られた。第１に、従来の固定方法で生じる、光結合部品
を固定する部位の形状に起因する固定の際の光軸のずれ
、外部環境特に、温度、湿度の変化による光軸のずれを
低減せしめ、光結合系の結合損失を少なくする固定方法
を提供する。第２に、従って、光回路部品を保持する構
造体と固定されるべき光回路部品の固定部の形状が精度
の良い曲率を有する球面であるため、光回路部品の光軸
の調整が簡単にでき、接着剤若しくは溶接を用いた固定
の際の光軸のズレを最小限にくいとめることができる固
定方法を提供する。第３に、同時に、外部環境特に、温
度、湿度の変化による光軸のズレを低減せしめ、光結合
系の結合損失を極めて少なくできる固定方法を提供する
。第４に、従って、信頼性の高い光結合を有する固定方
法を提供する。Effects of the Invention As explained above, the following remarkable technical effects were obtained by the method of fixing optical circuit components of the present invention. First, it reduces the deviation of the optical axis during fixation due to the shape of the part to which the optical coupling component is fixed, which occurs in conventional fixing methods, and the deviation of the optical axis due to changes in the external environment, especially temperature and humidity, A fixing method for reducing coupling loss of an optical coupling system is provided. Second, since the structure that holds the optical circuit component and the fixing part of the optical circuit component to be fixed are spherical surfaces with precise curvature, the optical axis of the optical circuit component can be easily adjusted. To provide a fixing method that can minimize deviation of an optical axis when fixing using adhesive or welding. Thirdly, the present invention provides a fixing method that simultaneously reduces deviation of the optical axis due to changes in the external environment, particularly temperature and humidity, and extremely reduces coupling loss in the optical coupling system. Fourthly, we therefore provide a fixation method with reliable optical coupling.
【図１】本発明の光回路部品の固定方法を説明するため
の斜視図である。FIG. 1 is a perspective view for explaining a method of fixing an optical circuit component according to the present invention.
【図２】本発明の光回路部品の固定方法での光軸の調整
方法を示す説明図である。FIG. 2 is an explanatory diagram showing a method of adjusting an optical axis in the method of fixing an optical circuit component of the present invention.
【図３】従来の光回路部品の固定方法を説明するための
斜視図である。FIG. 3 is a perspective view for explaining a conventional method of fixing optical circuit components.
【図４】従来の光回路部品の固定方法を説明するための
斜視図である。FIG. 4 is a perspective view for explaining a conventional method of fixing optical circuit components.
１ 光ファイ
バ−３ 集光
レンズ４ 金
属製構造体６
金属製基板７
樹脂接着剤８
金属製構造体の固定表面（球面状）1 Optical fiber 3 Condensing lens 4 Metal structure 6
Metal substrate 7
Resin adhesive 8
Fixed surface of metal structure (spherical)
Claims (1)
脂接着剤若しくは溶接により固定する光回路部品の固定
方法において、該光回路部品が、一部若しくは全体を保
持するための構造体を介して、固定し、該構造体と該光
回路部品との固定部の形状が、精度の良い曲率を有する
球面で構成され、その球面を通して、固定することを特
徴とする前記光回路部品の固定方法。Claim 1. A method for fixing optical circuit components, in which each optical circuit component constituting an optical coupling system is fixed by resin adhesive or welding, wherein the optical circuit component has a structure for holding a part or the whole thereof. The shape of the fixing part between the structure and the optical circuit component is composed of a spherical surface having a precise curvature, and the fixing is performed through the spherical surface. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12360191A JPH04349406A (en) | 1991-05-28 | 1991-05-28 | Method for fixing optical circuit component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12360191A JPH04349406A (en) | 1991-05-28 | 1991-05-28 | Method for fixing optical circuit component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04349406A true JPH04349406A (en) | 1992-12-03 |
Family
ID=14864651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12360191A Pending JPH04349406A (en) | 1991-05-28 | 1991-05-28 | Method for fixing optical circuit component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04349406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143273A3 (en) * | 2000-03-22 | 2006-06-07 | Matsushita Electric Industrial Co., Ltd. | Optical fiber device and optical transmission apparatus |
-
1991
- 1991-05-28 JP JP12360191A patent/JPH04349406A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1143273A3 (en) * | 2000-03-22 | 2006-06-07 | Matsushita Electric Industrial Co., Ltd. | Optical fiber device and optical transmission apparatus |
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