Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2005-08-16
2005-08-16
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C398S030000
Reexamination Certificate
active
06930823
ABSTRACT:
The present invention has an object to provide an optical transmission technology using Raman amplification wherein a supervisory signal transferred among a plurality of optical transmission apparatuses is superimposed on a main signal light by using a pumping light for Raman amplification. To this end, a Raman amplifier applied with the optical transmission method of the present invention, is provided with a supervisory signal superimposing section for superimposing a supervisory signal transferred among the optical transmission apparatuses on at least one of a plurality of pumping lights of different wavelengths to be supplied to a Raman amplification medium via a multiplexer from a pumping light generating section, thereby transmitting the main signal light propagated through the Raman amplification medium to be Raman amplified, which is superimposed with the supervisory signal.
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Naito Takao
Nakamoto Hiroshi
Shimojoh Naomasa
Tanaka Toshiki
Fujitsu Limited
Hellner Mark
Hughes Deandra M.
Staas & Halsey , LLP
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