Laser diode power control and modulator circuit

Details Laser diode power control and modulator circuit Laser diode power control and modulator circuit

1986-02-27

1989-09-19

Sikes, William L.

Coherent light generators

Particular component circuitry

Optical pumping

372 26, 372 29, H01S 300

Patent

active

048688363

ABSTRACT:
A control system particularly for a modulated laser diode such as for use in laser printers, laser communication systems, optical data storage and other uses employs bipolar integrated circuitry on a single chip with very few external components. The circuit is simple and of low cost and dependable construction and compensates for relatively slow changes in the output characteristics of the laser diode as caused by aging, temperature changes or other varying conditions. The drift compensation is accomplished through current differencing and combining a current difference signal with a modulation input signal to drive the laser diode.

REFERENCES:
patent: 3898583 (1975-08-01), Shuey

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