Title:
OPTICAL FIBER POLARIZER
Document Type and Number:
Japanese Patent JPH0572433
Kind Code:
A
Abstract:
PURPOSE:To provide the optical fiber polarizer of a high extinction ratio and low excess loss. CONSTITUTION:Stress imparting parts 3 are provided in a clad 2 around a core 1. The optical fiber is constituted by using GeO2, SiO2 for the core 1, SiO2 for a clad 2 and B2O3, SiO2 for the stress imparting parts 3. The specific refractive index difference of the core 1 is specified to DELTA 0.17%, the diameter of the core 1 after fiber formation to 5.5mum, the diameter of the stress imparting parts 3 to 35mum and the spacing between the stress imparting parts 3 to 77m. The specific refractive index difference of the core 1 and clad 2 of such double refractive optical fiber is >=0.13% and <=0.24% and the double refractive index thereof is >=8X10<-4> and, therefore, the optical fiber polarizer having the high extinction ratio and low excess loss is obtd. when this fiber is bent to a coil shape and formed as the optical fiber polarizer.
Inventors:
KUBO YUJI
SASAOKA HIDEYORI
TAKAGI MASAHIRO
SUGANUMA HIROSHI
TANAKA SHIGERU
SASAOKA HIDEYORI
TAKAGI MASAHIRO
SUGANUMA HIROSHI
TANAKA SHIGERU
Application Number:
JP23659891A
Publication Date:
March 26, 1993
Filing Date:
September 17, 1991
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
G02B6/024; (IPC1-7): G02B6/16
Attorney, Agent or Firm:
Yoshiki Hasegawa (3 outside)
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