Stabilization circuit for junction lasers

Details Stabilization circuit for junction lasers Stabilization circuit for junction lasers

1976-12-10

1978-08-22

Sikes, William L.

Oscillators

Molecular or particle resonant type

331 945H, H01S 310

Patent

active

041092171

ABSTRACT:
Described is a stabilization circuit for reducing the sensitivity of a junction laser to variations in the amplitude of drive current pulses. The circuit comprises a transistor connected in common emitter configuration, a junction laser connected between the collector and emitter, a photodetector connected between a voltage node and the emitter, a nonlinear element, such as a switching diode, connected between the node and the base, means for coupling a portion of the laser radiation to the photodetector, and means for coupling an input signal (e.g., current pulses) between the base and emitter. In one embodiment the photodetector is an avalanche photodiode to provide gain and the nonlinear element is a switching diode. In another embodiment the nonlinear element is a switching transistor to provide gain and the photodetector is a PIN photodiode.

REFERENCES:
patent: 3946335 (1976-03-01), DeLoach, Jr. et al.
patent: 3996526 (1976-12-01), D'Auria et al.

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