Method and apparatus for recovering AM channell signals distributed on an optical fiber
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United States of America Patent
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Oct 6, 1992
Grant Date -
N/A
app pub date -
Mar 19, 1990
filing date -
Mar 19, 1990
priority date (Note) -
Expired
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Abstract
Individual AM channel signals are recovered in the optical domain from a band of signals distributed on an optical fiber. A semiconductor optical amplifier is coupled to receive the band of optical channel signals. The band is defined by a lowest channel frequency f.sub.L and a highest channel frequency f.sub.H wherein f.sub.H <2f.sub.L. A local oscillator modulates the gain of the amplifier with a frequency that translates a selected channel signal to another frequency outside of the band for subsequent processing in the electrical domain.
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