Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1991-12-30
1993-12-28
Davie, James W.
Coherent light generators
Particular beam control device
Optical output stabilization
H01S 310
Patent
active
052746534
ABSTRACT:
A semiconductor laser driving system for driving a semiconductor laser element which emits a laser beam. The semiconductor laser element has characteristic wherein the intensity of the laser beam emitted from the semiconductor laser element is changed in accordance with the magnitude of an electric current applied to the semiconductor laser element and speed of change in the intensity of the emitted laser beam is high in case where the applied electric current flows in the semiconductor laser element. The semiconductor laser driving system comprises an applying unit for applying the electric current to the semiconductor laser element and controlling unit for controlling the electric current of the driving unit so that a light intensity of the laser beam is kept constant when the laser beam is emitted in either the high or low emitting conditions with the light intensity of the laser beam in the high emitting condition higher than the light intensity of the laser beam in the low emitting condition.
REFERENCES:
patent: 4847492 (1989-07-01), Houki
patent: 4907236 (1990-03-01), Shimada
patent: 5123023 (1992-06-01), Santarelli et al.
Brother Kogyo Kabushiki Kaisha
Davie James W.
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