Driving apparatus for semiconductor laser

Details Driving apparatus for semiconductor laser Driving apparatus for semiconductor laser

1982-08-26

1985-06-11

Davie, James W.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

372 38, G01J 132, H01S 310

Patent

active

045230897

ABSTRACT:
A driving circuit for driving a semiconductor laser by a driving signal containing a pulse signal representing given information and superposed on a DC bias signal includes means for monitoring intensity of laser light emitted when the DC bias is applied, and means for monitoring the intensity of laser light emitted when the pulse signal is applied. The DC bias signal and the pulse signal are varied in dependence on the result of comparisons between the outputs of the monitoring means and respective predetermined reference values.

REFERENCES:
patent: 4355395 (1982-10-01), Salter
Chen, "Simultaneous Feedback Control of Bias and Modulation Currents for Injection Lasers", Electronics Letters, 3rd Jan. 1980, vol. 16, No. 1, pp. 7-8.

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