Title:
OPTICAL BRANCH UNIT, OPTICAL AMPLIFICATION DEVICE, AND OPTICAL AMPLIFICATION METHOD
Document Type and Number:
Japanese Patent JP2015200728
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make branch ratio of light variable without using active control.SOLUTION: Input light passing through a faraday rotator 141 is branched for each polarization component by a polarization beam splitter 142. At that time, by using force accompanied with deformation of a member 30 deformed depending on temperature, relative positional relation between the faraday rotator 141 and magnets 145 and 146 is controlled.
Inventors:
IZUMI FUTOSHI
Application Number:
JP2014078513A
Publication Date:
November 12, 2015
Filing Date:
April 07, 2014
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G02F1/09; G02F1/35; H01S3/067; H01S3/10
Attorney, Agent or Firm:
Yu Sanada
Masahisa Yamamoto
Masahisa Yamamoto