Output control apparatus for laser oscillator

Details Output control apparatus for laser oscillator Output control apparatus for laser oscillator

1994-01-06

1996-03-12

Bovernick, Rodney B.

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, H01S 313

Patent

active

054992575

ABSTRACT:
A laser oscillator is connected to a power supply device for supplying excitation power to the laser oscillator and a detector is connected to detect the intensity of a laser beam output by the laser oscillator. An apparatus is provided for measuring the resistance value of the detector. A control circuit is operative to provide constant laser power control in response to the detector output under normal conditions but when the output signal of the measuring apparatus indicates a failure, the constant laser output control is changed to the constant power control. The apparatus prevents a constant laser output control from being disabled and workpieces from being defective if the output detector property of a laser changes abruptly.

REFERENCES:
patent: 4745614 (1988-05-01), Egawa et al.
patent: 5134623 (1992-07-01), Egawa et al.
patent: 5272716 (1993-12-01), Soltz et al.
patent: 5303249 (1994-04-01), Weimel
patent: 5317578 (1994-05-01), Ogou
patent: 5383208 (1995-01-01), Queniat et al.
Hostache, G. et al: Couples Thermoelectriques a definition spatiotemporelle fine. In French Journal: Revue General de Thermique, No. 299, Nov. 1986, pp. 539-543.

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