Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2011-08-23
2011-08-23
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C398S018000, C398S028000, C398S034000
Reexamination Certificate
active
08004751
ABSTRACT:
The WDM optical transmission system using distributed Raman amplification, before starting operation of main signal light, transfers a plurality of lights having different wavelengths to that of the main signal light (for example Raman amplification pump lights or the like) between first and second optical transmission devices connected to opposite ends of a transmission line, monitors transmission line input and output power for each light, calculates a transmission line loss in each wavelength using the monitor results, and specifies a type of the transmission line based on a loss wavelength characteristic that can be estimated from the calculation result. Then the power of pump light provided to the transmission light is optimized in accordance with the type of transmission line.
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Japanese Office Action mailed Nov. 10, 2009 corresponding to Japanese Application No. 2008-014935 (3 pages) (English translation 5 pages).
Fukushi Togo
Kondoh Masanori
Noheji Kiyotoshi
Onaka Miki
Bolda Eric
Fujitsu Limited
Staas & Halsey , LLP
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