Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2008-06-04
2011-12-13
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S337100, C359S341400
Reexamination Certificate
active
08077382
ABSTRACT:
Provided is a gain-clamped (GC) optical amplifier using a fiber Raman amplifier (FRA) having a Raman cavity. The FRA having a Raman cavity comprises a Raman fiber module (RFM) amplifying and outputting an input optical signal and a resonant cavity generating a Raman laser and a gain clamping laser (GC laser), wherein the resonant cavity is formed as a feedback loop between an input terminal and an output terminal of the RFM. Accordingly, a gain of an optical signal propagating along a core of RFM keeps a constant value regardless of input signal intensity by generating the GC laser for gain clamping between a wavelength band of the Raman laser and a gain band of input signals.
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Foreign Notice of Allowance issued on Sep. 29, 2008 in the corresponding KR application 10-2007-0059100.
Ahn Joon Tae
Chung Woon Jin
Park Bong Je
Seo Hong-Seok
Electronics and Telecommunications Research Institute
Hellner Mark
Rabin & Berdo P.C.
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