Excitation system for exciting a semiconductor laser device

Details Excitation system for exciting a semiconductor laser device Excitation system for exciting a semiconductor laser device

1989-06-14

1990-04-10

Sikes, William L.

Coherent light generators

Particular beam control device

Optical output stabilization

372 25, 372 38, H01L 2714, H01L 3100, H01L 3114

Patent

active

049167065

ABSTRACT:
An excitation system for exciting a semiconductor laser device used in a laser printer. An input terminal receives a modulated input signal having a level changed depending upon information. A bias signal is superimposed on the modulated input signal and the resultant signal is applied to the semiconductor laser device for exciting the same. A photodiode is provided to receive the laser beam emitted from the semiconductor laser device to thus detect the intensity of the laser beam. In response to the detected intensity of the laser beam, the level of the bias signal is adjusted so that a predetermined quantity of laser beam is emitted from the semiconductor laser device when the modulated input signal having a possible maximum level is inputted to the input terminal.

REFERENCES:
patent: 4689795 (1987-08-01), Yoshimoto et al.
patent: 4768198 (1988-08-01), Deki

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