Method and apparatus for recovering AM channell signals distribu

Details Method and apparatus for recovering AM channell signals distribu Method and apparatus for recovering AM channell signals distribu

1990-03-19

1992-10-06

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359132, 359162, 359189, H04J 1402, H04B 1000

Patent

active

051537621

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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patent: 4989200 (1991-01-01), Olshanky et al.
patent: 5020049 (1991-05-01), Bodeep et al.
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"Subcarrier Multiplexed Passive Optical Network for Low-Cost Video Distribution", R. Olshansky et al., presented at OFC 1989.
"Carrier-to-Noise Ratio Performance of a Ninety-Channel FM Video Optical System Employing Subcarrier Multiplexing and Two Cascaded traveling-Wave Laser Amplifiers", W. I. Way et al., presented at OFC 1989.
"Optical Mixer-Preamplifier for Lightwave Subcarrier Systems", T. E. Darci et al., Electronics Letters, vol. 24, No. 3, pp. 179-180, 1988.

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