Driving circuit of a semiconductor laser

Details Driving circuit of a semiconductor laser Driving circuit of a semiconductor laser

1991-04-17

1992-06-30

Epps, Georgia Y.

Coherent light generators

Particular component circuitry

Optical pumping

372 29, H01S 313

Patent

active

051270153

ABSTRACT:
A driving circuit of a semiconductor laser includes a photodiode receiving a light of the semiconductor laser, a first detecting circuit for calculating a mean value signal of outputs of the semiconductor laser in accordance with an output of the photodiode, a second detecting circuit for calculating a maximum value signal of the outputs of the semiconductor laser, a circuit receiving the mean value signal for supplying a bias current for driving the semiconductor laser, a high-frequency superimposing circuit for modulating the bias current by high-frequency waves, and a modulating degree control circuit comparing the mean value signal with the maximum value signal for making a period of time for which the minimum value of the optical output values of the semiconductor laser becomes zero, in accordance with the comparison results.

REFERENCES:
patent: 4355395 (1982-10-01), Salter et al.
patent: 4480325 (1984-10-01), Aiki et al.

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