Laser frequency drift control device and method

Details Laser frequency drift control device and method Laser frequency drift control device and method

1986-02-07

1988-03-08

Davie, James W.

Coherent light generators

Particular beam control device

Optical output stabilization

372 33, 372 34, 372 38, H01S 313

Patent

active

047303239

ABSTRACT:
A laser frequency drift control device for an electrically powered, integral electrode and end-mirror, gas laser tube is disclosed. The control device includes a resistance and transistor heater assembly, which is electrically connected to be powered by the discharge current of the laser tube and thermally coupled to an end-mirror to heat the same, a thermal sensor coupled to the end-mirror to be heated for the purpose of obtaining temperature feedback, and a control circuit which varies heating of the end-mirror in accordance with the temperature feedback. LEDs provide visual feedback as to operation of the heater assembly to permit adjustment thereof. A method of controlling temperature variation induced laser frequency drift is also disclosed.

REFERENCES:
patent: 3523256 (1970-08-01), Johnson
patent: 3588254 (1971-06-01), Rhoades
patent: 3662279 (1972-05-01), Sandstrom et al.
patent: 4184127 (1980-01-01), Green et al.
patent: 4573159 (1986-02-01), Aagano et al.

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