Low distortion laser system for AM fiber optic communication

Details Low distortion laser system for AM fiber optic communication Low distortion laser system for AM fiber optic communication

1991-08-15

1993-10-26

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359154, 359132, H04J 1400

Patent

active

052571246

ABSTRACT:
An information signal modulates a first optical carrier. The information signal is inverted to modulate a second optical carrier. The modulated first and second optical carriers are multiplexed into a single optical signal for communication over an optical fiber path. At a receiver, the optical signal is demultiplexed to recover the information signal and the inverted information signal. The recovered signals are combined to provide the information signal in the electrical domain with reduced distortion. A dual-detector balanced optical diode pair can be used to combine the recovered information and inverted information signals and provide an analog RF output. The apparatus is particularly suitable for the transmission of AM-VSB television signals.

REFERENCES:
patent: 4393518 (1983-07-01), Briley
patent: 5126871 (1992-06-01), Jeffers
M. Makiuchi, et al., "High-Speed Monolithic GainAs Twin-pin Photodiode for Balanced Optical Coherent Receivers," Electronics Letters, 17 Aug. 1989, vol. 25, No. 17, pp. 1144-1145.

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