JPH0427403U

JPH0427403U -

Info

Publication number: JPH0427403U
Application number: JP6761590U
Authority: JP
Priority date: 1990-06-26
Filing date: 1990-06-26
Publication date: 1992-03-04
Anticipated expiration: 2005-06-26
Also published as: JP2506091Y2

Description

[Brief explanation of the drawing]

第１図は本考案の光フアイバカプラの具体的一
実施例の斜視図で、第２図は第１図の光フアイバ
カプラの製作方法を示す縦断面図、第２図ａは固
定基板の縦断面図、第２図ｂは固定基板を固定治
具を把持して凸部に光フアイバを接着固定した状
態の縦断面図、第２図ｃは段部に接着剤を塗布し
た状態の固定基板の縦断面図、第２図ｄは固定基
板と保護カバーとを接着固定した状態の縦断面図
、第３図は４ポート光フアイバカプラの他の実施
例の縦断面図で、第３図ａは外形形状が円筒型の
縦断面図、第３図ｂはかまぼこ型の縦断面図、第
４図は多対の光フアイバカプラを収納するさらに
他の実施例の縦断面図であつて、第４図ａは多段
形の縦断面図、第４図ｂ，ｃは同一固定基板上に
光フアイバを収納した実施例の縦断面図、第５図
は従来の光フアイバカプラを示し、第５図ａは基
板に光フアイバを収納した状態を示す斜視図、第
５図ｂは凹状固定基板に光フアイバを接着した状
態を示す拡大斜視図、第５図ｃは収納部材の斜視
図、第５図ｄは収納ケースに基板および光フアイ
バを収納し、両端をキヤツプで閉蓋した状態を示
す斜視図、第６図は従来の光フアイバカプラで、
第６図ａは光フアイバの溶融結合部が収納体に収
容された状態の縦断面図、第６図ｂは収納体の肉
厚を厚く形成した状態の縦断面図、第６図ｃは光
フアイバの溶融結合部に接着剤が付着した状態を
示す縦断面図である。２……光フアイバ、１０……溶融結合部、１，
１６，１８，２０，２２，２３，２４……固定基
板、１１，１７，１９，２１，２２，２５，２６
……保護カバー、６……凸部、７……凹部。 Fig. 1 is a perspective view of a specific embodiment of the optical fiber coupler of the present invention, Fig. 2 is a longitudinal cross-sectional view showing a method of manufacturing the optical fiber coupler of Fig. 1, and Fig. 2a is a longitudinal cross-section of the fixed substrate. Top view, Figure 2b is a vertical cross-sectional view of the fixing board with the fixing jig held and the optical fiber glued and fixed to the convex part, and Figure 2c is the fixing board with adhesive applied to the stepped part. FIG. 2d is a longitudinal sectional view of the fixing board and the protective cover fixed with adhesive, FIG. 3 is a longitudinal sectional view of another embodiment of the 4-port optical fiber coupler, and FIG. 3b is a longitudinal sectional view of a cylinder-shaped outer shape, FIG. 4 is a longitudinal sectional view of yet another embodiment that accommodates multiple pairs of optical fiber couplers, and Figure 4a is a vertical cross-sectional view of a multi-stage type, Figures 4b and c are vertical cross-sectional views of an embodiment in which optical fibers are housed on the same fixed substrate, and Figure 5 shows a conventional optical fiber coupler. 5a is a perspective view showing a state in which an optical fiber is housed in a substrate, FIG. 5b is an enlarged perspective view showing a state in which an optical fiber is adhered to a concave fixed substrate, and FIG. d is a perspective view showing a state in which the substrate and optical fiber are stored in a storage case and both ends are closed with caps; FIG. 6 is a conventional optical fiber coupler;
Fig. 6a is a vertical cross-sectional view of the optical fiber fused portion housed in the storage body, Fig. 6b is a longitudinal cross-sectional view of the storage body with a thick wall, and Fig. 6c is the optical fiber. FIG. 3 is a longitudinal cross-sectional view showing a state in which an adhesive is attached to a fusion bonded portion of a fiber. 2... Optical fiber, 10... Melted joint part, 1,
16, 18, 20, 22, 23, 24...Fixed board, 11, 17, 19, 21, 22, 25, 26
...protective cover, 6...convex part, 7...concave part.

Claims

[Scope of utility model registration request]

In an optical fiber coupler in which the member that accommodates the fused portions of a plurality of optical fibers is composed of a fixed substrate that fixes the optical fibers and a protective cover that protects the fixed substrate, a convex portion is provided on the fixed substrate and the convex portion is An optical fiber is adhesively fixed thereon, and a protective cover having a recess carved therein for receiving the convex portion of the fixing substrate with the optical fiber adhesively fixed thereon with a gap is bonded to the stepped portions on both sides of the convex portion of the fixing substrate. An optical fiber coupler characterized by being fixed.