Phat Dinh Le

US Patent:

53433246, Aug 30, 1994

Filed:

Nov 15, 1991

Appl. No.:

7/794719

Inventors:

Phat Le - Anaheim CA
Xin Cheng - Los Angeles CA

Assignee:

Amoco Corporation - Chicago IL

International Classification:

H04B 1004

US Classification:

359184

Abstract:

An electro-optical modulation system comprising an optical modulator for pulse-modulating an incoming light beam in response to a pulsed RF input signal and to a bias signal and for producing a pulse-modulated optical output which is characterized by a plurality of enveloped pulses, optical detector for producing an electrical signal which is representative of the output from the optical modulator, average detecting device for producing pulse envelope signals which are representative of the envelopes of the pulses, and a bias control circuit, using a plurality of pulse envelop signals, for producing the bias signal as a function of the pulse envelopes.