Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2005-12-13
2005-12-13
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
Reexamination Certificate
active
06975447
ABSTRACT:
The invention provides an optical fiber amplifier which assures stable operation of a pump light source and efficiently makes use of residual pump power to achieve improvement in conversion efficiency. The optical fiber amplifier includes a rare earth doped fiber. Pump light from a pump light source is introduced into one end of the rare earth doped fiber by way of a first optical coupler, and residual pump light originating from the pump light and arriving at the other end of the rare earth doped fiber is applied to the other rare earth doped fiber amplifier or the loss compensation of a dispersion compensating fiber by Raman amplification.
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Fujitsu Limited
Hellner Mark
Katten Muchin & Rosenman LLP
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