Laser frequency control

Details Laser frequency control Laser frequency control

1988-07-18

1989-08-08

Sikes, William L.

Coherent light generators

Particular beam control device

Optical output stabilization

372 28, 372 29, 372 31, 372 33, 372 81, 372 83, H01S 313

Patent

active

048560103

ABSTRACT:
A radio frequency excited carbon dioxide laser (50) is stabilized by sensing (66) variation in output power to generate a feedback signal (68,78 ) that is employed to vary amplitude of the radio frequency exciting signal from a power source (62). Frequency modulation of the laser output is achieved by varying the amplitude of the radio frequency signal from a power source (62) in response to a frequency modulating control signal from a modulation source (74). Both stabilization and frequency modulation are accomplished by combining the sensed power feedback signal with the frequency modulation control signal in a summing circuit (70) and employing the combined signal to vary magnitude of the radio frequency exciting signal.

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R. L. Shoemaker et al., "Frequency-Switchable CO.sub.2 Laser: Design and Performance;" Applied Optics, Mar. 1, 1982; vol. 21; No. 5; pp. 961-966.

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