Laser diode control apparatus

Details Laser diode control apparatus Laser diode control apparatus

1989-07-25

1990-05-08

Davie, James W.

Coherent light generators

Particular beam control device

Modulation

372 31, 372 32, 372 38, H01S 310

Patent

active

049244701

ABSTRACT:
Control of the amplitude of data modulation applied to a laser diode is critical to prevent excessive wavelength shift and resultant dispersion of the signal in the waveguide at high data rates. The present invention utilizes the intermodulation products of two low frequency signals superimposed upon the modulation signal to produce detected products which are separated into appropriate components and utilized to control the amplitude of the modulation signal such that its logic 0 level occurs at a given optimum point. A further complementary and interacting control loop is utilized to control the bias point or center point for this data modulation signal.

REFERENCES:
patent: 4243951 (1981-01-01), Wolkstein et al.

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