Laser resonator with laser medium exhibiting thermally induced b

Details Laser resonator with laser medium exhibiting thermally induced b Laser resonator with laser medium exhibiting thermally induced b

1988-11-21

1989-10-03

Sikes, William L.

Coherent light generators

Particular resonant cavity

Specified cavity component

372 10, 372 17, 372 92, 372 93, 372108, 372 98, 372105, H01S 308, H01S 311

Patent

active

048721816

ABSTRACT:
A laser resonator generates a polarized output beam with a laser medium exhibiting thermally induced birefringence and a Y-shaped resonant cavity. A lasing axis extends between a first side and a second side of the laser medium, Radiation transmitted out of the first side of the laser medium has its polarization rotated by 90 degrees and is guided back along the lasing axis into the laser medium for a second pass. A polarizer is mounted on the second side of the laser medium for guiding the radiation having a first polarization along a first path and radiation having a second polarization that is 90 degrees from the first polarization along a second path. Both the first path and the second path include the lasing axis of the laser medium and form a Y-shaped resonant cavity. Along the first path, a high reflecting means is provided to reflect the radiation back along the first path. Along the second path, an output coupler is provided by which a component of the radiation is reflected back along the second path and a component is transmitted as the polarized output beam. A Q-switch is provided in the first path between the polarizer and the high reflecting means, or in the second path between the polarizer and the output coupler, or in both paths.

REFERENCES:
patent: 3564454 (1971-02-01), Hook et al.
patent: 4048515 (1977-09-01), Liu
patent: 4127827 (1978-11-01), Barry
patent: 4156209 (1979-05-01), Herbst et al.
patent: 4197513 (1980-04-01), Bell et al.
patent: 4276518 (1981-06-01), Ferguson
patent: 4310808 (1982-01-01), Byer et al.
patent: 4360925 (1982-11-01), Brosnan et al.
patent: 4752931 (1988-06-01), Dutcher et al.
Heritier et al., "Thermal Effects in High Power Q-Switched Lasers".

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