Metal vapor laser device stabilizing system

Coherent light generators – Particular operating compensation means

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372 29, 372 34, 372 56, H01S 303

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active

048667226

ABSTRACT:
A metal vapor laser device which can generate laser oscillations stably even if the atmospheric temperature of a metal vapor laser tube thereof varies suddenly. The metal vapor laser device comprises a metal vapor laser tube having a metal tank in which a working metal is contained, a heater for heating the metal in the metal tank, a power source circuit for the heater, a voltage detector for detecting an inter-electrode voltage of the laser tube, and a temperature detector for detecting an atmospheric temperature of the laser tube. The power source circuit includes a controlling circuit for controlling a power supply to the heater in response to detection signals from the voltage detector and the temperature detector to maintain the pressure of the metal vapor within the laser tube constant. When the atmospheric temperature of the laser tube varies suddenly, the operation of the heater is thus feed-forward controlled in response to the detection signal from the temperature detector.

REFERENCES:
patent: 4232274 (1980-11-01), Tokudome et al.
patent: 4689796 (1987-08-01), Wright
patent: 4701925 (1987-10-01), Fuke et al.
SPIE, vol. 741, Design of Optical Systems Incorporating Low Power Lasers, 1987, by M. W. Dowley and entitled "A Modern Helium Cadmium Laser-The Evolution of a Design".

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