Laser apparatus including crystal protection circuitry and metho

Details Laser apparatus including crystal protection circuitry and metho Laser apparatus including crystal protection circuitry and metho

1991-07-22

1993-01-05

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

372 35, 372 29, 372 25, 372 33, H01S 300

Patent

active

051777568

ABSTRACT:
A laser apparatus is disclosed which is capable of protecting the laser slab or rod crystal within the laser from damage due to overheating when the laser malfunctions in a manner such that laser output ceases while optical pumping of the laser crystal continues. The laser apparatus includes a laser crystal situated within a laser cavity. The apparatus also includes an excitation lamp for pumping the crystal to generate a laser beam to project along a desired main path. A first sensor senses the cessation of the projection of the laser beam along the desired main path and a second sensor senses the continuing excitation of the excitation lamp. The apparatus further includes a extinguishing circuit for extinguishing the excitation lamp a predetermined amount of time after the cessation of the laser beam such that damage to the laser apparatus due to overheating is avoided.

REFERENCES:
patent: 4950268 (1990-08-01), Rink
patent: 5018152 (1991-05-01), Linne et al.

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