Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1998-04-30
2000-07-18
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359160, 359179, 372 6, H01S 3067, H01S 3091, G02B 626
Patent
active
060915404
ABSTRACT:
An optical amplifier which amplifies a signal light, wherein a pumping light source outputting a pumping light, a first wavelength multiplexer multiplexing the signal light and the pumping light and providing a multiplexed light to a first doped fiber. A first doped fiber amplifying the signal light, a wavelength demultiplexer receiving the multiplexed light from the first doped fiber and separately outputting the amplified signal light and the pumping light. An optical component receiving the amplified signal light form the demultiplexer and attenuating the amplified signal light and a second wavelength multiplexer multiplexing the attenuated signal light received from the optical component and the demultiplexed pumping light received from the wavelength demultiplexer. A second doped fiber amplifying the attenuated signal light.
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Hitachi , Ltd.
Moskowitz Nelson
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