Optical modulation device

Details Optical modulation device Optical modulation device

1979-11-20

1981-12-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

350384, G01J 120

Patent

active

043061427

ABSTRACT:
The disclosed device comprises two duty ratio detectors for detecting respective duty ratios of an input modulation signal modulating an incoming light beam and a modulated intensity-of-light signal proportional to an intensity of an outgoing light beam, a differential amplifier for producing a difference between both duty ratios, and a bias control for supplying this difference to an optical modulator through a bias amplifier.

REFERENCES:
patent: 3780296 (1973-12-01), Waksberg et al.
patent: 4071751 (1978-01-01), Waksberg
patent: 4158131 (1979-06-01), Probst

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