Power control system for controlling the power output of a modul

Details Power control system for controlling the power output of a modul Power control system for controlling the power output of a modul

1985-06-18

1987-11-24

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

372 26, 372 31, H01S 310, H01S 313

Patent

active

047093692

ABSTRACT:
A power control system for controlling the power output of a modulated laser diode receives current pulses of a signal to be evaluated and establishes a DC voltage which represents the peak value of the light pulses out of the laser diode. An integrator feedback loop compares the desired power with the established DC voltage representing the peak value and causes the laser diode to make light pulses at the correct value. The control system includes a sample and hold which is constructed to act in association with the integrator feedback loop to perform at a rate in all substantial respects as if the modulated, chopped light output of the laser diode were continuously on and to produce in a symmetric manner effective control in real time both for an increase and for a decrease in the signal to be evaluated.

REFERENCES:
patent: 4594717 (1986-06-01), Bracht et al.
Malvino, Electronic Principles Third Edition, pp. 375-376, McGraw-Hill Book Company.
National Semiconductor Operational Amplifiers/Buffers" pp. 3-125 and 3-149.

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