Wire array light polarizer for gas laser

Details Wire array light polarizer for gas laser Wire array light polarizer for gas laser

1985-08-13

1988-07-12

Wan, Gene

Coherent light generators

Particular resonant cavity

Specified cavity component

H01S 308

Patent

active

047575140

ABSTRACT:
Light generated in the optical resonator of a gas laser is polarized by disposing an array of fine, parallel, highly light reflective wires in the path of the light beam propagating in the resonator. The wires are cooled by conduction of heat to a heat sink or by causing gas to flow through the array. In one embodiment, the wire array is arranged to be rotated to enable the plane of polarization to be turned to any desired orientation. The difference in absorption by the wire array between two orthogonal components of the flux in the resonator need be only in the order of 1% to cause nearly complete linear polarization of the light emerging from the resonator. The parallel wires, preferably, are spaced so that they are situated at the peaks of the lower order modes in the resonator. In lieu of using fine wires, very fine parallel lines or grooves whose width and spacing are such as to provide a low efficiency diffraction grating may be provided in the surface of an optical element of the resonator.

REFERENCES:
patent: 3875529 (1975-04-01), Hintz
patent: 4024466 (1977-05-01), Cremosnik
Cambridge Physical Sciences, "Near Infrared Grid Polarisers", Apr. 1972.

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