Frequency doubled ultraviolet laser
AssigneeSpectra-Physics Lasers, Inc.
InventorsEric G. Marason, Jude Katsch, Alfred O. Feitisch, Steve Guggenheimer
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Abstract
A frequency doubled ultraviolet laser comprising means for enabling a beam of coherent electromagnetic radiation to be propagated along an intracavity path, means for holding and translating an anisotropic crystal in this path, means for detecting the crystal temperature relative to the optimum frequency doubling temperature, and means for correcting any shortfalls in the efficiency of ultraviolet generation by adjusting the crystal temperature, crystal position, and/or the intensity of the fundamental beam.
Claims11
A laser for generation of ultraviolet radiation by temperature-tuned phase-matched frequency multiplication, comprising
- means for enabling a fundamental beam of electromagnetic radiation to be propagated along a path,
- means for holding and translating through one or more degrees of freedom a birefringent crystal in said path,
- electronic means for detecting a temperature of said crystal relative to a temperature for maximum efficiency of ultraviolet generation,
- said electronic means comprising two or more electrodes situated close enough to said crystal to provide a detectable modulation of the generated ultraviolet output beam when said electrodes are electrically connected to a source of alternating voltage of sufficient amplitude and frequency,
- said detectable modulation being in phase with said alternating voltage when the temperature of said crystal is too high and out of phase with said alternating voltage when the temperature of said crystal is too low,
- means for increasing, decreasing, and maintaining the temperature of said crystal,
- an output mirror reflecting said fundamental beam and transmitting said generated ultraviolet beam,
- optoelectronic means for monitoring the intensity of said generated ultraviolet beam,
- whereby constant, stable output of said ultraviolet radiation is maintained.
Dependencies are inferred from the claim text.