JPS58141208U

JPS58141208U - polarization maintaining optical fiber

Info

Publication number: JPS58141208U
Application number: JP3725682U
Authority: JP
Inventors: 徳永　利秀; 博梶岡; 尚登上塚
Original assignee: 日立電線株式会社
Priority date: 1982-03-17
Filing date: 1982-03-17
Publication date: 1983-09-22

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は偏波面保存光ファイバの断面図、第２図は本考
案の一実施例である偏波面保存光ファイ　　　　゛バ母
材の正面図および右側面図、第３図は第２図の両端部よ
りパラフィンを除去した後の状態を示す偏波面保存光フ
ァイバ母材の正面図および右側面図、第４図は第３図の
変形例である偏波面保存光ファイバ母材の正面図および
右側面図である。１・・・コア、２・・・楕円クラッド、３・・・クラッ
ド、４・・・偏波面保存光ファイバ、５・・・偏波面保
存光ファイバ母材、６・・・パラフィン。Figure 1 is a cross-sectional view of a polarization-maintaining optical fiber, Figure 2 is a front view and right side view of a polarization-maintaining optical fiber base material that is an embodiment of the present invention, and Figure 3 is a cross-sectional view of a polarization-maintaining optical fiber. A front view and a right side view of the polarization-maintaining optical fiber preform showing the state after paraffin has been removed from both ends; FIG. 4 is a front view and right side view of the polarization-preserving optical fiber preform, which is a modification of FIG. It is a right side view. DESCRIPTION OF SYMBOLS 1... Core, 2... Elliptical cladding, 3... Clad, 4... Polarization maintaining optical fiber, 5... Polarization maintaining optical fiber base material, 6... Paraffin.

Claims

[Scope of utility model registration request]

a core located at the center of the optical fiber; a first cladding surrounding the core and having a refractive index lower than that of the core;
A polarization-maintaining optical fiber having a second cladding surrounding the cladding and having the same refractive index as the first cladding, wherein the core or the first cladding has an elliptical cross section. 1. A polarization-maintaining optical fiber, characterized in that both ends of the second cladding are formed into irregular shapes so as to indicate the axis direction of the cross-sectional ellipse.