Coherent light generators – Particular beam control device – Tuning
Patent
1998-05-29
2000-02-29
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Tuning
372 9, 372 92, 372 98, H01S 310
Patent
active
06031852&
ABSTRACT:
The present invention describes the use of a pair of acoustooptic devices in a laser or other optical resonator to produce a wavelength-dependent deflection of the light without incurring a net frequency shift. This permits rapid electronic tuning of the resonator wavelength, as well as rapid electronic variation of cavity loss, out-coupling fraction, and round-trip phase shift. The dispersive quality of acoustooptic devices in transmission is utilized as a reflection grating substitute. Two mirrors, one an output coupler, a gain medium and two acoustooptic devices arranged for maximum efficiency such that the incident and diffracted beams are approximately at the Bragg angle for each acoustooptic device permit the laser wavelength to be determined by the acoustic frequency.
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Busch George E.
Remelius Dennis K.
Shimada Tsutomu
Strauss Charlie E. M.
Thompson David C.
Freund Samuel F.
Jr. Leon Scott
The Regents of the University of California
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