Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2007-05-29
2007-05-29
Hughes, Deandra M. (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
Reexamination Certificate
active
10086742
ABSTRACT:
A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, and an optical system which maintains a second light output of the second-stage light amplifier at a constant power level. The first-stage and second-stage light amplifiers have different gain vs wavelength characteristics so that the multi-wavelength light amplifier has no wavelength-dependence of a gain thereof.
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Chikama Terumi
Kinoshita Susumu
Sugaya Yasushi
Takeda Miki
Fujitsu Limited
Hughes Deandra M.
Staas & Halsey , LLP
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