Method and apparatus for assessing laser temperature

Details Method and apparatus for assessing laser temperature Method and apparatus for assessing laser temperature

1991-08-20

1993-12-07

Bovernick, Rodney B.

Coherent light generators

Particular temperature control

H01S 304, H01S 3045

Patent

active

052689158

ABSTRACT:
The operating temperature of a laser can be assessed by determining the ratio of light of different wavelengths emitted by the laser. A copper vapor laser emits green and yellow light having two distinct wavelengths and the ratio of said wavelengths is temperature dependant. Preferably the ratio of green to yellow light is in the region of 2 to 1 for optimum operating conditions. The ratio is determined using green and yellow light filters (3, 4) having associated light dependant resistors (6, 7) forming input and feedback resistors in an operational amplifier circuit (9).

REFERENCES:
patent: 3656856 (1972-04-01), Katz et al.

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