Title:
無限追従型の偏波制御器及びこれを用いた偏波モード分散補償器並びに無限追従偏波制御方法
Document Type and Number:
Japanese Patent JP4113877
Kind Code:
B2
Abstract:
A polarization controller is configured to comprise polarization state monitoring section for monitoring polarization states of input light and output light of a variable polarization light element; and a control section, when the positions on a Poincare sphere expressing each of the polarization states monitored by the polarization state monitoring section are at the positions being symmetric or approximately symmetric for the equator of the Poincare sphere, for rotating the Poincare sphere by pi by using the earth axis of the Poincare sphere as a rotation axis by changing the azimuth of the optical axis of the variable polarization light element, and also for inverting the changing direction of the phase shift amount. By this, arbitrary and endless control of polarization light can be realized by a phase shift amount being less than the wavelength lambda of the input light.
Inventors:
Kyosuke Sone
Setsuo Yoshida
Hideyuki Miyata
Setsuo Yoshida
Hideyuki Miyata
Application Number:
JP2004569563A
Publication Date:
July 09, 2008
Filing Date:
March 18, 2003
Export Citation:
Assignee:
富士通株式会社
International Classes:
G02F1/01; G01J3/45; G01J4/04; G02F1/03; G02F1/035
Domestic Patent References:
| JP1503008A | ||||
| JP63118709A | ||||
| JP2000330079A |
Other References:
IEEE Photonics Technology Letters,1992年,Vol.4,No.5,503-505
Attorney, Agent or Firm:
Yu Sanada