Acousto-optical device with lithium tantalate transducer

Details Acousto-optical device with lithium tantalate transducer Acousto-optical device with lithium tantalate transducer

1988-11-28

1990-12-18

Sikes, William L.

Coherent light generators

Particular beam control device

Q-switch

372 18, H01S 3117, H01S 398

Patent

active

049791761

ABSTRACT:
An acousto-optical device includes a solid state substrate having optical characteristics affected by an acoustic wave in the substrate, and a Z-cut lithium tantalate transducer coupled to the substrate for inducing the acoustic wave. Lithium tantalate provides the transducer with a coupling coefficient and acoustic impedance mismatch which generate a very high finesse acoustic standing wave within the substrate. The lithium tantalate also provides low shear wave components with relatively high manufacturing tolerances. The acousto-optical device with a lithium tantalate transducer is also utilized as a high Q modelocker in a laser capable of producing short pulses of laser light.

REFERENCES:
patent: 3828276 (1974-08-01), Cohen
patent: 4257685 (1981-03-01), Barta et al.
patent: 4516838 (1985-05-01), Bademian
patent: 4759613 (1988-07-01), Fox
R. C. Cunningham, "A Guide to Mode Locking", Electrooptical Systems Design, Apr. 1975.
Albrechet et al., "Building a Simple Reliable Low-Cost Modelocker System", Applied Optics, vol. 22, No. 9, 1 May 1983.
Rice et al., "A Barium Sodium Niobate Acousto-Optic Mode Locker/Frequency Doubler (AOML/FD) for Nd:YAG", Journal of Applied Physics, vol. 47, No. 7, Jul. 1976.
O. E. Mattiat, "Ultrasonic Transducer Materials", 1971, pp. 161-162.
A. W. Warner, et al., "Determination of Elastic and Piezoelectric Constants for Crystals in Class (3m)" Oct. 1966, Journal of the Acoustical Society of America, pp. 1223-1231.
J. J. Jacob, "Current Trends in AO Device Technology for Solid State Picosecond Laser Systems", Jan. 1987 (Reprint) The International Society for Optical Engineering, vol. 753, pp. 130-134.

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