JPH052103U - Fixed structure of optical fiber - Google Patents
Fixed structure of optical fiberInfo
- Publication number
- JPH052103U JPH052103U JP4727691U JP4727691U JPH052103U JP H052103 U JPH052103 U JP H052103U JP 4727691 U JP4727691 U JP 4727691U JP 4727691 U JP4727691 U JP 4727691U JP H052103 U JPH052103 U JP H052103U
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- holding member
- low melting
- optical
- melting point
- 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.)
- Granted
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
(57)【要約】
【構成】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からなる保持
部材２の中空部に光ファイバ１を挿入し、保持部材２と
光ファイバ１の隙間を低融点ガラス３で埋めて固定す
る。
【効果】低融点ガラスは合金半田と結晶構造が異なり、
クリープ現象を生じないので、光ファイバの経時的な光
軸ずれを防止できる。
(57) [Summary] [Structure] The optical fiber 1 is inserted into the hollow portion of the holding member 2 having a structure in which the ceramic pipe 202 inscribed in the metal pipe 201 is fixed by the brazing material 203, and the holding member 2 and the optical fiber 1 are inserted. The gap is filled with the low melting point glass 3 and fixed. [Effect] Low melting glass has a different crystal structure from alloy solder,
Since the creep phenomenon does not occur, it is possible to prevent the optical axis of the optical fiber from shifting with time.
Description
【０００１】[0001]
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。 The present invention relates to a fixing structure for an optical fiber used in optical systems such as optical fiber communication and optical measuring instruments.
【０００２】[0002]
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。 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 vertical cross-sectional view of an optical fiber fixing structure using an alloy solder of lead and tin. The optical fiber 11 is fixed by inserting it into a hollow metal holding member 12 having a metal film 14 on its inner surface, and then filling a gap between the two members with a lead-tin alloy solder 13. In this case, a metal film 15 is provided on the side surface of the optical fiber 11 by a method such as vapor deposition.
【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, the structure for fixing with an adhesive uses an adhesive instead of the alloy solder 13. In this case, the metal film 14 on the inner surface of the holding member 12 and the metal film 15 on the side surface of the optical fiber 11 are unnecessary.
【０００５】[0005]
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。 When an adhesive is used in the above-described conventional optical fiber fixing structure, the adhesive generally has high hygroscopicity, so that deformation and reduction in adhesive strength easily occur under high humidity conditions. Moreover, since the glass transition temperature is low, the maximum operating temperature of optical components using adhesive is restricted. In addition, there is a problem of contaminating the optical surface in the vicinity due to the generation of outgas, which causes a problem of lack of long-term reliability.
【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, the literature (Santomi et al. “A Consideration on Screening Method for Solder-fixed Optical Circuit Components”, IEICE Transactions, March 1986. , VoL. J69-C, No. 3, pp. 297-303), alloy solder is a metal having a relatively low melting point, so that a load such as gravity is particularly applied to the solder joint. If this is always the case, the creep phenomenon in which the solder distorts over time tends to occur. Therefore, when the optical fiber is fixed with this alloy solder, the position of the optical fiber changes with time, and there is a problem that the stability of the optical system cannot be secured for a long period of time. Also, if the ambient temperature changes due to changes in the environmental temperature or heat generation in the electronic circuit, tensile and compressive stress is repeatedly applied to the solder joint. This mechanical fatigue also causes a crack in the solder, which displaces the position of the optical fiber, causing the optical axis to shift.
【０００７】[0007]
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。 The optical fiber fixing structure of the present invention comprises a hollow holding member composed of a cylindrical metal pipe and a ceramic pipe inscribed in the metal pipe, an optical fiber inserted into the hollow holding member, and the holding member. The low melting point glass, which is used in a gap between the optical fiber and the holding member and joins the optical fiber, is provided.
【０００８】[0008]
次に、本考案について図面を参照して説明する。 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 an 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, the hollow holding member 2, the optical fiber 1 inserted into the hollow portion of the holding member 2, and the gap between the holding member 2 and the optical fiber 1 are used to join the two. And a low melting point glass 3. That is, the optical fiber 1 made of quartz glass has a tapered tip end, and after being inserted into a pipe-shaped holding member 2, a low-melting-point glass 3 containing lead glass as a main component is used. It is fixed by filling a gap between the optical fiber 1 and the holding member 2. The holding member 2 used in this embodiment has a structure in which a ceramic pipe 202 in contact with 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 this 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 the creep phenomenon does not occur. . Therefore, the position of the optical fiber 1 is not displaced and the optical axis is not displaced.
【００１２】[0012]
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 adopting a configuration using a low melting point glass as a method for fixing an optical fiber. That is, since the low melting point glass has a different crystal structure from the solder material and does not cause a creep phenomenon, it is possible to prevent the optical axis of the optical fiber from shifting with time. Therefore, there is an effect that the reliability of the optical component using the optical fiber can be improved. Further, when the holding member has a structure in which the metal pipe is inscribed in the ceramic pipe, it has an effect of absorbing the thermal strain generated when the optical fiber and the holding member are fixed by the low melting point 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 vertical cross-sectional view showing an 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 vertical 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 1,11 Optical fiber 2,12 Holding member 3 Low melting point glass 13 Alloy solder 14,15 Metal film 201 Metal pipe 202 Ceramic pipe 203 Brazing material
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。Claims for utility model registration 1. 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 between a holding member and the optical fiber and bonds 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 true JPH052103U (en) | 1993-01-14 |
| JP2580922Y2 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) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153657A (en) * | 1974-05-30 | 1975-12-10 | ||
| JPH03242605A (en) * | 1990-02-21 | 1991-10-29 | Fujitsu Ltd | Hermetic sealing structure of optical fiber introducing part |
-
1991
- 1991-06-24 JP JP1991047276U patent/JP2580922Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50153657A (en) * | 1974-05-30 | 1975-12-10 | ||
| JPH03242605A (en) * | 1990-02-21 | 1991-10-29 | Fujitsu Ltd | Hermetic sealing structure of optical fiber introducing part |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2580922Y2 (en) | 1998-09-17 |
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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 |