Title:
OPTICAL ISOLATOR
Document Type and Number:
Japanese Patent JPH04242221
Kind Code:
A
Abstract:
PURPOSE:To obtain the optical isolator which has small insertion loss while enabling a wavelength multiplex communication by itself in spite of small size and also displaying sufficient extinction performance to various wavelengths of transmission. CONSTITUTION:The optical isolator is constituted by arranging a polarizer 1, a Faraday rotator 3, and an analyzer 2 in this order and the Faraday rotator 3 has garnet structure expressed by a composition formula (Tb1-(a+b) LnaBib)3(Fe1-cMc)5 O12...(1). In this composition formula (1), Ln is at least one kind of element selected among rare earth elements other than Tb while 0
Inventors:
WATANABE TOSHIAKI
RIYUUOU TOSHIHIKO
RIYUUOU TOSHIHIKO
Application Number:
JP406291A
Publication Date:
August 28, 1992
Filing Date:
January 17, 1991
Export Citation:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
G02B27/28; G02F1/09; (IPC1-7): G02B27/28; G02F1/09
Attorney, Agent or Firm:
Yoshio Komiya