Gas laser having thermally stable optical mount

Details Gas laser having thermally stable optical mount Gas laser having thermally stable optical mount

1985-06-06

1987-08-11

Wan, Gene

Coherent light generators

Particular resonant cavity

Mirror support or alignment structure

H01S 308

Patent

active

046866850

ABSTRACT:
A laser of the flowing gas type employs an optical resonator having mirrors at each end of the lasing region which are supported, without a separate optical bench, by a hollow cylindrical gas-tight housing. Enclosed in the housing are a pump for circulating the gas, electrodes for causing lasing of the flowing gas, and heat exchangers for cooling the gas. Those enclosed structures are subject to thermal expansion and contraction and are hung between a pair of plates. One of those plates is affixed to one end of the housing while the other plate is free to move within the housing so that thermal expansion and contraction of the enclosed structures does not place an appreciable stress on the housing. A heat shield is disposed between the hung structures and the inside wall of the housing to provide a barrier to the transmission of heat to the housing and the housing is liquid cooled to stabilize its temperature. The mirrors of the optical resonator are mounted on rings attached to each end of the housing. Apertures are provided in the plates to provide windows for the passage of light reflected between the mirrors of the optical resonator. At least one of the mirrors is mounted so that its alignment can be adjusted without opening the gas tight housing.

REFERENCES:
patent: 4099143 (1978-07-01), Foster

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