Dynamic power control for an external cavity stabilized laser di

Details Dynamic power control for an external cavity stabilized laser di Dynamic power control for an external cavity stabilized laser di

1985-03-18

1987-10-13

Arnold, Bruce Y.

Coherent light generators

Particular component circuitry

Optical pumping

372 18, 372 43, G02B 2610

Patent

active

046994467

ABSTRACT:
A dynamic power control for an external cavity stabilized laser diode adapted for use with a Raster Output Scanner employing a photodiode to convert light emitted from the rear facet of the diode internal cavity to an electrical signal, and a comparator for comparing the light intensity signal with a reference signal and adjusting the drive current input to the diode to maintain diode output pwer constant. In a second embodiment, diode power is taken from the zero order beam at the external cavity transmissive wavelength selecting grating, in a third embodiment from the external cavity output beam, and in a fourth embodiment, from the zero order beam that passes through the holographic disc facets.

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patent: 4237427 (1980-12-01), Holland
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patent: 4516242 (1985-05-01), Yokota
patent: 4548463 (1985-10-01), Cato et al.
Stockton et al., "Injection Laser Diode Transmitter Design", Oct. 1982, pp. 93-96.
A. Olsson, "Properties & Application of External Cavity Semi-Conductor Lasers", Chapter 2--The External Cavity Semiconductor Laser, Jan. 1982, pp. 10-39.

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