Invention Grant
- Patent Title: Optical communication system, method of measuring optical transmission line in the optical communication system, transmitting station, and receiving station
- Patent Title (中): 光通信系统，光通信系统中的光传输线测量方法，发射台和接收台
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Application No.: US12413555Application Date: 2009-03-28
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Publication No.: US08213805B2Publication Date: 2012-07-03
- Inventor: Takeshi Sakamoto
- Applicant: Takeshi Sakamoto
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Priority: JP2008-085778 20080328
- Main IPC: H04B10/00
- IPC: H04B10/00 ; H04B10/08
Abstract:
According to halt of a Raman pumping light source, a transmitting light power of a first light which is subject to receive a Raman gain is controlled to increase. In this state, a first input/output light power for a first light of an optical transmission line is measured, the first input/output light power being used for determining a reference of loss characteristic of the optical transmission line. A second input/output light power for a second light of the optical transmission line is measured, the second light not being subject to receive the Raman gain, the second input/output light power being used for determining a fluctuation of the reference.
Public/Granted literature
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