JPS6025041Y2 - optical coupling circuit - Google Patents
optical coupling circuitInfo
- Publication number
- JPS6025041Y2 JPS6025041Y2 JP7019180U JP7019180U JPS6025041Y2 JP S6025041 Y2 JPS6025041 Y2 JP S6025041Y2 JP 7019180 U JP7019180 U JP 7019180U JP 7019180 U JP7019180 U JP 7019180U JP S6025041 Y2 JPS6025041 Y2 JP S6025041Y2
- Authority
- JP
- Japan
- Prior art keywords
- end surface
- tube
- fiber
- attached
- coupling circuit
- 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
Links
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Description
【考案の詳細な説明】
本考案は光結合回路に関し、とくに発光素子とカラスフ
ァイバー（以下ファイバーと略記）によって構成される
光結合回路の改良に関する。[Detailed Description of the Invention] The present invention relates to an optical coupling circuit, and more particularly to an improvement of an optical coupling circuit constituted by a light emitting element and a glass fiber (hereinafter abbreviated as fiber).
ファイバーの入射点あるいは出射点における光の反射は
、発光素子へのフィードバック効果や伝送される光信号
への寄生効果を伴うため抑制されなければならない。Reflection of light at the input point or output point of the fiber must be suppressed because it has a feedback effect on the light emitting device and a parasitic effect on the transmitted optical signal.
このための一手段として、ファイバーの端面に所定の厚
みを有するガラス板を接着して微小なファイバ一端面で
の反射を抑制し光ビーム径の拡大した位置にガラスと空
気の界面を設け、反射光が微小な発光素子やファイバー
に再入射する量を抑制する方法が提案されている。As a means of achieving this, a glass plate with a predetermined thickness is bonded to the end face of the fiber to suppress reflection at one end face of the microfiber, and an interface between the glass and air is created at a position where the light beam diameter is enlarged. Methods have been proposed to suppress the amount of light that re-enters tiny light emitting elements and fibers.
一方、ファイバーの端面を保護し、且つ所望の光透過率
を得るため、ファイバーの端部に所定の長さのガラス管
を装着し、更にその外側に金属管を装着し、しかるのち
端面を研磨仕上げする方法が用いられる。On the other hand, in order to protect the end face of the fiber and obtain the desired light transmittance, a glass tube of a predetermined length is attached to the end of the fiber, a metal tube is attached to the outside of the glass tube, and then the end face is polished. A finishing method is used.
ガラス板の接着による反射光の抑制を、ガラス管および
金属管により保護されたファイバ一端面に実施する際に
、従来用いられていた構成は、第１図に例を示す如くフ
ァイバー１の端部の所定長さにわたり外被２を除き、ガ
ラス管３を装着し、更に金属管４を装着し、端面を研磨
仕上げして、ファイバ一端末を形成たのち、ガラス板５
を取り付けた保持具６に差し込み界面を接着していた。When suppressing reflected light by adhering a glass plate to one end face of a fiber protected by a glass tube and a metal tube, a configuration conventionally used is to suppress reflected light by adhering a glass plate to one end face of a fiber 1, as shown in FIG. The jacket 2 is removed over a predetermined length, a glass tube 3 is attached, a metal tube 4 is attached, and the end face is polished to form one end of the fiber, and then a glass plate 5 is attached.
was inserted into the holder 6 to which the holder 6 was attached, and the interface was glued.
この構成では、ガラス管と金属管がガラス板の面に密着
して接着されており、ガラスと金属の熱膨張係数が異な
るため、温度変化により、ファイバーとガラス板の界面
に応力が加わり、接着面がはがれて空気層が形成され意
図した反射光の抑制効果が阻害される事故が起き易かっ
た。In this configuration, the glass tube and the metal tube are closely bonded to the surface of the glass plate, and since the thermal expansion coefficients of the glass and metal are different, temperature changes cause stress to be applied to the interface between the fiber and the glass plate, resulting in bonding. Accidents were likely to occur where the surface peeled off and an air layer was formed, inhibiting the intended effect of suppressing reflected light.
本考案の目的は急激な温度変化にも耐え、かつファイバ
一端末の保護と反射光の抑制を高い信頼度で両立させる
ことができる光結合回路を提供することにある。The purpose of the present invention is to provide an optical coupling circuit that can withstand sudden temperature changes and can protect one fiber end and suppress reflected light with high reliability.
本考案によれば単一の光ファイバーの端部に装着された
ガラス管の外側に金属管が装着されて上記光ファイバー
の端面とガラス管の端面と金属管の端面とが同一平面上
に位置しており、かつ金属管の内径より小さな外径を有
する透明板が金属管に接触しないようにガラス管の端面
および光ファイバーの端面上に透明接着剤によって接着
されていることを特徴とする光結合回路が得られる。According to the present invention, a metal tube is attached to the outside of a glass tube attached to the end of a single optical fiber, and the end surface of the optical fiber, the end surface of the glass tube, and the end surface of the metal tube are located on the same plane. and a transparent plate having an outer diameter smaller than the inner diameter of the metal tube is bonded to the end surface of the glass tube and the end surface of the optical fiber with a transparent adhesive so as not to contact the metal tube. can get.
以下、第２図、第３図を参照して本考案を説明する。Hereinafter, the present invention will be explained with reference to FIGS. 2 and 3.
本考案の構成は第２図においてファイバー１の端部から
外被２を除去し、ガラス管３を装着し、次いでその外側
に金属管４を装着し、端面研磨を施したのち、ファイバ
一端面にガラス管３の外径を越えない外径を有するガラ
ス板５が所望の光波長に対して透明な接着剤を介して接
着されていることを特徴とする光結合回路である。The structure of the present invention is shown in FIG. 2, in which the outer sheath 2 is removed from the end of the fiber 1, a glass tube 3 is attached, a metal tube 4 is attached to the outside of the outer sheath, and the end surface is polished. This optical coupling circuit is characterized in that a glass plate 5 having an outer diameter not exceeding the outer diameter of the glass tube 3 is bonded to the glass plate 5 through an adhesive that is transparent to a desired wavelength of light.
本考案を前述の保持具に適合させるには、第３図に示す
ように、保持具６の内径に金属管４の内径に相当する突
起７を設ければ、外見上同一の寸法・機能を有するもの
が得られる。In order to adapt the present invention to the above-mentioned holder, as shown in FIG. What you have is what you get.
本考案の光結合回路は、構成が簡便で高い信頼度を有す
るので、光結合素子や光通信装置をはじめ、種々の光伝
送装置に応用して経済的な効果を上げることができる。Since the optical coupling circuit of the present invention has a simple configuration and high reliability, it can be applied to various optical transmission devices, including optical coupling elements and optical communication devices, to achieve economical effects.
第１図は従来の構成を説明する断面図。
第２図は本考案の実施例を示す断面図。
第３図は本考案の応用例を示す断面図。
同一機能を有する部分の記号は同一記号で示す。
１・・・・・・ファイバー、２・・・・・・外被、３・
・・・・・ガラス管、４・・・・・・金属管、５・・・
・・・ガラス板、６・・・・・・保持具、７・・・・・
・突起。FIG. 1 is a sectional view illustrating a conventional configuration. FIG. 2 is a sectional view showing an embodiment of the present invention. FIG. 3 is a sectional view showing an example of application of the present invention. Parts having the same function are indicated by the same symbol. 1...Fiber, 2...Outer cover, 3.
...Glass tube, 4...Metal tube, 5...
...Glass plate, 6...Holder, 7...
·protrusion.
Claims (1)
に金属管が装着されて前記光ファイバーの端面とガラス
管の端面と金属管の端面とが同一平面上に位置しており
、かつ前記金属管の内径より小さな外径を有する透明板
が前記金属管に接触しないように前記ガラス管の端面お
よび光ファイバーの端面上に透明接着剤によって接着さ
れていることを特徴とする光結合回路。A metal tube is attached to the outside of a glass tube attached to the end of a single optical fiber, and the end surface of the optical fiber, the end surface of the glass tube, and the end surface of the metal tube are located on the same plane, and An optical coupling circuit characterized in that a transparent plate having an outer diameter smaller than the inner diameter of the tube is adhered to the end surface of the glass tube and the end surface of the optical fiber using a transparent adhesive so as not to contact the metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7019180U JPS6025041Y2 (en) | 1980-05-21 | 1980-05-21 | optical coupling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7019180U JPS6025041Y2 (en) | 1980-05-21 | 1980-05-21 | optical coupling circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56172813U JPS56172813U (en) | 1981-12-21 |
| JPS6025041Y2 true JPS6025041Y2 (en) | 1985-07-27 |
Family
ID=29664064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7019180U Expired JPS6025041Y2 (en) | 1980-05-21 | 1980-05-21 | optical coupling circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025041Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61137108A (en) * | 1984-12-07 | 1986-06-24 | Fujitsu Ltd | Structure of optical fiber terminal |
-
1980
- 1980-05-21 JP JP7019180U patent/JPS6025041Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56172813U (en) | 1981-12-21 |
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