Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2011-04-26
2011-04-26
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07933063
ABSTRACT:
A monitoring apparatus, based on an optical power monitored in photodetectors arranged at input and output ends of a transmission line, in a condition where pump light is supplied to the transmission line at a time of initial startup of an optical communication system, obtains a relationship for the noise light generated due to Raman amplification, between forward direction noise light power and backward direction noise light power, and while in service, converts the backward direction noise light power monitored by the photodetectors at the input ends of the transmission line into the forward direction noise light power in an arithmetic processing section, in accordance with the relationship obtained at the time of the initial startup. As a result the power of noise light generated due to Raman amplification, can be monitored in real time at high speed.
REFERENCES:
patent: 5295015 (1994-03-01), Yoneyama
patent: 7061665 (2006-06-01), Sobe et al.
patent: 7139117 (2006-11-01), Nakamura et al.
patent: 7312918 (2007-12-01), Ishikawa et al.
patent: 7554721 (2009-06-01), Hiraizumi et al.
patent: 2003/0090780 (2003-05-01), Sobe et al.
patent: 2004/0190123 (2004-09-01), Nakamura et al.
patent: 2005/0024712 (2005-02-01), Hiraizumi et al.
patent: 2005/0105167 (2005-05-01), Martinelli et al.
patent: 1 318 621 (2003-06-01), None
patent: 1 624 596 (2006-02-01), None
patent: 2006-189465 (2006-07-01), None
patent: 2004/105275 (2004-12-01), None
European Search Report mailed Jul. 6, 2009 and issued in corresponding European Patent Application 08018813.9.
M. Takeda et al., “Active Gain-Tilt Equalization by Preferentially 1.43 μm- or 1.48 μm-Pumped Raman Amplification”, 10thOptical Amplifiers and Their Applications 1999, Technical Digest, 8 pages (Including cover pages).
Bolda Eric
Fujitsu Limited
Staas & Halsey , LLP
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