Solid-state laser device having a feedback loop

Details Solid-state laser device having a feedback loop Solid-state laser device having a feedback loop

1992-08-26

1993-11-23

Epps, Georgia Y.

Coherent light generators

Particular pumping means

Pumping with optical or radiant energy

372 69, 372 70, 372 71, 372 34, 372 36, H01S 3091

Patent

active

052651150

ABSTRACT:
In a solid-state laser device which pumps a solid-state laser medium in a laser resonator by an excitation laser beam generated from a semiconductor laser unit and which emits an output laser beam, a photo detector detects intensity of the output laser beam to produce a photo detection signal which corresponds to the intensity of the output laser beam and which is sent to a controller. The controller controls the semiconductor laser unit in response to the photo detection signal and adjusts intensity of the excitation laser beam to keep the intensity of the output laser beam substantially constant. The solid-state laser medium may be pumped from an end surface or a side surface. An optical function element, such as a wavelength conversion element, a Q switch element, may be located outside or inside of the laser resonator.

REFERENCES:
patent: 4809291 (1989-02-01), Byer et al.
patent: 4974230 (1990-11-01), Henmati
patent: 5168503 (1992-12-01), Maeda
patent: 5181214 (1993-01-01), Berger et al.

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