Optical: systems and elements – Optical amplifier – Beam combination or separation
Reexamination Certificate
2005-09-13
2005-09-13
Gregory, Bernarr E. (Department: 3663)
Optical: systems and elements
Optical amplifier
Beam combination or separation
C359S337400
Reexamination Certificate
active
06943940
ABSTRACT:
An optical amplifier, or optical repeater, for amplifying wavelength division multiplexed (WDM) light. A first demultiplexer demultiplexes the WDM light into first and second lights corresponding to different wavelengths in the WDM light. First and second optical amplifiers amplify the first and second lights, respectively. A first multiplexer multiplexes the amplified first and second lights into a multiplexed light. A dispersion compensator compensates for dispersion in the multiplexed light. A second demultiplexer demultiplexes the dispersion compensated, multiplexed light into the first and second lights. Third and fourth optical amplifiers amplify the demultiplexed first and second lights, respectively. A second multiplexer multiplexes the amplified first and second lights from the third and fourth optical amplifiers into a WDM light. The optical amplifier can be configured so that the first and second lights travel through the dispersion compensator in opposite directions.
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Kinoshita Susumu
Sugaya Yasushi
Fujitsu Limited
Gregory Bernarr E.
Hughes Deandra M.
Staas & Halsey , LLP
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