Solid state laser Q-switch having radial color center distributi

Details Solid state laser Q-switch having radial color center distributi Solid state laser Q-switch having radial color center distributi

1987-07-17

1989-05-23

Howell, Janice A.

Radiant energy

Irradiation of objects or material

Ion or electron beam irradiation

2504921, 372 11, 372 42, G21K 500

Patent

active

048333336

ABSTRACT:
A passive laser Q-switch is fabricated from a crystal which can form saturable color centers, such as lithium fluoride. The arbitrarily long crystal is irradiated with electrons from the side, or radially, to impart a radial distribution of saturable color centers therein, with the highest density at the periphery of the crystal. Optionally, the crystal can also be irradiated axially with electrons or in any direction with another form of radiation having greater penetration into the crystal, such as gamma radiation, to establish a base level of saturable color centers throughout the crystal. The crystal having the radial distribution of color centers acts as a Q-switch, but additionally tends to reduce beam divergence and increase the brightness of the laser beam by virtue of the nonlinear bleaching mechanism.

REFERENCES:
patent: 4519082 (1985-05-01), Schneider
patent: 4644550 (1987-02-01), Csery et al.
patent: 4672619 (1987-06-01), Luty et al.
818423, Derwent's abstract, Aug. 16, 1979.

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