JP2580922Y2 - Optical fiber fixing structure - Google Patents
Optical fiber fixing structureInfo
- Publication number
- JP2580922Y2 JP2580922Y2 JP1991047276U JP4727691U JP2580922Y2 JP 2580922 Y2 JP2580922 Y2 JP 2580922Y2 JP 1991047276 U JP1991047276 U JP 1991047276U JP 4727691 U JP4727691 U JP 4727691U JP 2580922 Y2 JP2580922 Y2 JP 2580922Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- holding member
- fixing structure
- fiber fixing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
【0001】[0001]
【産業上の利用分野】本考案は光ファイバ通信や光計測
器等の光学系に用いる光ファイバの固定構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber fixing structure used for an optical system such as an optical fiber communication or an optical measuring instrument.
【0002】[0002]
【従来の技術】従来、光ファイバを固定する技術として
は、接着剤を用いる方法と、鉛と錫の合金半田を用いる
方法とが一般的に知られている。2. Description of the Related Art Conventionally, as a technique for fixing an optical fiber, a method using an adhesive and a method using an alloy solder of lead and tin are generally known.
【0003】図2は鉛と錫の合金半田を用いた場合の光
ファイバ固定構造の縦断面図である。光ファイバ11
は、内面に金属膜14を設けた中空の金属製の保持部材
12に挿入した後、鉛と錫の合金半田13で両部材間の
隙間を埋めることにより固定されている。この場合、光
ファイバ11の側面には蒸着等の方法により金属膜15
を設けている。FIG. 2 is a longitudinal sectional view of an optical fiber fixing structure when an alloy solder of lead and tin is used. Optical fiber 11
Is fixed by inserting it into a hollow metal holding member 12 having a metal film 14 provided on the inner surface, and then filling a gap between the two members with an alloy solder 13 of lead and tin. In this case, the metal film 15 is formed on the side surface of the optical fiber 11 by a method such as evaporation.
Is provided.
【0004】一方、接着剤で固定する場合の構造は、合
金半田13の代わりに接着剤を用いている。この場合に
は、保持部材12の内面の金属膜14と光ファイバ11
の側面の金属膜15は不要となる。On the other hand, when the structure is fixed with an adhesive, an adhesive is used instead of the alloy solder 13. In this case, the metal film 14 on the inner surface of the holding member 12 and the optical fiber 11
The metal film 15 on the side surface is unnecessary.
【0005】[0005]
【考案が解決しようとする課題】上述した従来の光ファ
イバの固定構造において、接着剤を使用する場合には、
接着剤は一般に吸湿性が高いため、高湿条件で変形や接
着強度の低下が起こり易い。しかもガラス転移点温度が
低いため、接着剤を用いた光部品の使用最高温度が制約
される。また、アウトガスが生じることにより付近の光
学面を汚染する問題もあることから、長期的な信頼性に
欠けるという問題がある。In the conventional optical fiber fixing structure described above, when an adhesive is used,
Since adhesives generally have high hygroscopicity, they tend to be deformed or have a reduced adhesive strength under high humidity conditions. In addition, since the glass transition temperature is low, the maximum use temperature of an optical component using an adhesive is restricted. In addition, there is a problem in that the outgassing causes contamination of the optical surface in the vicinity, and thus there is a problem that long-term reliability is lacking.
【0006】一般に広く使用されている鉛と錫の合金半
田を使用する場合には、文献(三冨他“半田固定光回路
部品のスクリーニング法に関する一考察”電子通信学会
論文誌,1986年3月,VoL.J69−C,No.
3,pp.297〜303)に示されているように、合
金半田は相対的に融点が低い金属であるため、特に半田
接合部に重力等の荷重が常にかかる場合には、半田が時
間とともに歪んでいくというクリープ現象を生じ易い。
このため、光ファイバをこの合金半田で固定した場合、
光ファイバの位置が時間と共に変化していくことにな
り、長期にわたる光学系の安定性が確保できないという
問題がある。また、環境温度変化や電子回路の発熱等に
よる周囲温度の変化があると、半田接合部に引張りと圧
縮の応力が繰り返しかかる。この機械的疲労により半田
に亀裂が生じて光ファイバの位置が変位し、光軸がずれ
るという問題もある。In the case of using an alloy solder of lead and tin, which is widely used in general, see the literature (Mitomi et al., "A Consideration on a Screening Method for Solder-Fixed Optical Circuit Components", Transactions of the Institute of Electronics and Communication Engineers, March 1986. , VoL.J69-C, No.
3, pp. 297-303), since the alloy solder is a metal having a relatively low melting point, the solder is distorted with time especially when a load such as gravity is constantly applied to the solder joint. Creep phenomenon easily occurs.
Therefore, when the optical fiber is fixed with this alloy solder,
Since the position of the optical fiber changes with time, there is a problem that long-term stability of the optical system cannot be ensured. In addition, when there is a change in ambient temperature due to a change in environmental temperature or heat generated by an electronic circuit, a tensile and compressive stress is repeatedly applied to the solder joint. There is also a problem that the cracks are generated in the solder due to the mechanical fatigue, the position of the optical fiber is displaced, and the optical axis is shifted.
【0007】[0007]
【課題を解決するための手段】本考案の光ファイバの固
定構造は、円筒状の金属パイプ及びこの金属パイプに内
接するセラミックパイプとからなる中空の保持部材と、
前記中空の保持部材に挿入される光ファイバと、前記保
持部材と前記光ファイバとの隙間に用いられ前記保持部
材と前記光ファイバとを接合する低融点ガラスとを備え
ている。An optical fiber fixing structure according to the present invention comprises: a hollow holding member comprising a cylindrical metal pipe and a ceramic pipe inscribed in the metal pipe;
An optical fiber inserted into the hollow holding member; and a low-melting glass used for a gap between the holding member and the optical fiber and joining the holding member and the optical fiber.
【0008】[0008]
【実施例】次に、本考案について図面を参照して説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【0009】図1は本考案に係わる光ファイバの固定構
造の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of an optical fiber fixing structure according to the present invention.
【0010】本実施例は中空の保持部材2と、この保持
部材2の中空部に挿入される光ファイバ1と、保持部材
2と光ファイバ1との隙間に用いられてこの両者を接合
する低融点ガラス3とを有してなる。即ち石英ガラスか
らなる光ファイバ1は、先端部が先球テーパ状に加工さ
れており、パイプ状の保持部材2に挿入した後、鉛ガラ
スを主成分とする低融点ガラス3を用いて、光ファイバ
1と保持部材2との隙間を埋めることにより固定されて
いる。なお本実施例に用いる保持部材2の構成は、金属
パイプ201と内接するセラミックパイプ202をろう
材203により固定した構成となっている。In this embodiment, a hollow holding member 2, an optical fiber 1 inserted into a hollow portion of the holding member 2, and a low-pitch member which is used in a gap between the holding member 2 and the optical fiber 1 and joins the two. And melting point glass 3. That is, the optical fiber 1 made of quartz glass has a tip portion processed into a tapered spherical shape, and after being inserted into a pipe-shaped holding member 2, the optical fiber 1 is made of low melting glass 3 containing lead glass as a main component. It is fixed by filling the gap between the fiber 1 and the holding member 2. Note that the configuration of the holding member 2 used in the present embodiment is such that a ceramic pipe 202 inscribed in a metal pipe 201 is fixed by a brazing material 203.
【0011】このように本実施例は、光ファイバ1を固
定する手段として低融点ガラス3を用いており、その低
融点ガラス3では凝固後の結晶構造が半田と異なり、ク
リープ現象が生じない。従って、光ファイバ1の位置が
変位して光軸がずれるようなことがない。As described above, in the present embodiment, the low melting point glass 3 is used as a means for fixing the optical fiber 1. In the low melting point glass 3, the crystal structure after solidification is different from that of solder, and no creep phenomenon occurs. Therefore, the optical axis does not shift due to the displacement of the optical fiber 1.
【0012】[0012]
【考案の効果】以上説明したように本考案は、光ファイ
バを固定する方法として、低融点ガラスを用いた構成と
したことにより、次のような効果を有する。即ち、低融
点ガラスは半田材料と結晶構造が異なり、クリープ現象
を生じないため、光ファイバの経時的な光軸ずれを防止
できる。従って、光ファイバを用いた光部品の信頼性を
向上させることができるという効果を有する。また、保
持部材として金属パイプにセラミックパイプを内接する
構造とした場合、光ファイバと保持部材とを低融点ガラ
スで固定する時に生ずる熱歪を吸収する効果を有する。As described above, the present invention has the following effects by using a low-melting glass as a method for fixing an optical fiber. That is, since the low-melting glass has a different crystal structure from that of the solder material and does not cause a creep phenomenon, the optical axis of the optical fiber can be prevented from shifting with time. Therefore, there is an effect that the reliability of the optical component using the optical fiber can be improved. When the holding member has a structure in which a ceramic pipe is inscribed in a metal pipe, it has an effect of absorbing thermal strain generated when the optical fiber and the holding member are fixed with low-melting glass.
【図1】本考案に係わる光ファイバの固定構造の一実施
例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of an optical fiber fixing structure according to the present invention.
【図2】従来の光ファイバの固定構造の一例を示す縦断
面図である。FIG. 2 is a longitudinal sectional view showing an example of a conventional optical fiber fixing structure.
1,11 光ファイバ 2,12 保持部材 3 低融点ガラス 13 合金半田 14,15 金属膜 201 金属パイプ 202 セラミックパイプ 203 ろう材 DESCRIPTION OF SYMBOLS 1,11 Optical fiber 2,12 Holding member 3 Low melting glass 13 Alloy solder 14,15 Metal film 201 Metal pipe 202 Ceramic pipe 203 Brazing material
フロントページの続き (58)調査した分野(Int.Cl.6,DB名) G02B 6/00 341 G02B 6/24 G02B 6/26 G02B 6/36Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) G02B 6/00 341 G02B 6/24 G02B 6/26 G02B 6/36
Claims (1)
に内接するセラミックパイプとからなる中空の保持部材
と、前記中空の保持部材に挿入される光ファイバと、前
記保持部材と前記光ファイバとの隙間に用いられ前記保
持部材と前記光ファイバとを接合する低融点ガラスとを
備えることを特徴とする光ファイバの固定構造。A hollow holding member comprising a cylindrical metal pipe and a ceramic pipe inscribed in the metal pipe; an optical fiber inserted into the hollow holding member; An optical fiber fixing structure, comprising: a low-melting glass that is used in a gap and joins the holding member and the optical fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991047276U JP2580922Y2 (en) | 1991-06-24 | 1991-06-24 | Optical fiber fixing structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991047276U JP2580922Y2 (en) | 1991-06-24 | 1991-06-24 | Optical fiber fixing structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH052103U JPH052103U (en) | 1993-01-14 |
JP2580922Y2 true JP2580922Y2 (en) | 1998-09-17 |
Family
ID=12770768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991047276U Expired - Fee Related JP2580922Y2 (en) | 1991-06-24 | 1991-06-24 | Optical fiber fixing structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2580922Y2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5413995B2 (en) * | 1974-05-30 | 1979-06-04 | ||
JP2663992B2 (en) * | 1990-02-21 | 1997-10-15 | 富士通株式会社 | Hermetically sealed structure of optical fiber introduction section |
-
1991
- 1991-06-24 JP JP1991047276U patent/JP2580922Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH052103U (en) | 1993-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980602 |
|
LAPS | Cancellation because of no payment of annual fees |