Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1997-06-09
1999-06-15
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359177, H01S 300
Patent
active
059127600
ABSTRACT:
A light amplifier includes first and second light amplifying parts, and a first control part. The first light amplifying part has a first number of elements or ions performing a light amplifying operation and is excited by a first exciting light which is excessive with respect to the first number of elements or ions. The first light amplifying part amplifies a signal light applied hereto. The second light amplifying part has a second number of elements or ions performing a light amplifying operation and is excited by a second exciting light having a constant intensity. The second number is than the first number. The second light amplifying part amplifies an amplified signal light output from the first light amplifying part. The first control part performs a control operation so that an intensity of the amplified signal light output from the first light amplifying part is constant.
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Y. Sugaya, Novel Configuration For Low-Noise and Wide-Dynamic-Range Er-Doped Fiber Amplifier for WDM Systems; Jun. 16, 1995.
Fujitsu Limited
Hellner Mark
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