Invention Grant
- Patent Title: Control apparatus, polarization multiplexing light modulator, light transmitting apparatus, and method of controlling polarization multiplexing light modulator
- Patent Title (中): 控制装置,偏振复用光调制器,光发射装置和控制偏振复用光调制器的方法
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Application No.: US12476334Application Date: 2009-06-02
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Publication No.: US08693870B2Publication Date: 2014-04-08
- Inventor: Masahiro Yuki
- Applicant: Masahiro Yuki
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Priority: JP2008-222259 20080829
- Main IPC: H04J14/06
- IPC: H04J14/06 ; H04B10/04

Abstract:
The present invention provides a control apparatus including: an output monitor which monitors polarization-multiplexed output light output from a polarization multiplexing light modulator which modulates light of two systems independent of each other, polarization-multiplexes light signals of the two systems subjected to the light modulation, and outputs the polarization-multiplexed light signals; and a control unit which controls a delay time difference at a stage where the light signals of the two systems forming the polarization multiplexing light modulator are polarization-multiplexed based on a monitor result of the output monitor. The control apparatus controls a delay time difference between polarization channels easily or surely.
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