1988-12-23
1990-10-02
Laroche, Eugene R.
350358, G02F 111, G02F 523
Patent
active
049603221
ABSTRACT:
An apparatus for steering a coherent input beam of electromagnetic energy includes an optically nonlinear medium for positioning in the path of the input beam. A source of acoustic energy generates acoustic waves in the nonlinear medium with a predetermined frequency and direction. The frequency and direction of the acoustic waves are selected to diffract a portion of the input beam as an output beam at a predetermined angle with respect to the input beam, interference between the input beam and the output beam initially causing an electrostrictive grating to form in the medium, with the grating subsequently causing additional energy to be transferred from the input beam to the output beam by stimulated Brillouin scattering.
REFERENCES:
patent: 3915556 (1975-10-01), Roland et al.
patent: 4624534 (1986-11-01), Amand
patent: 4660206 (1987-04-01), Halmos et al.
Khoshnevisan et al., Relationship Between Nonlinear Electrostrictive Kerr Effects and Acousto-Optics, Proceedings of Society of Photooptical and Instrumentation Engineers O-E LASE '87 Meeting, Los Angeles, Calif. (Jan., 1987).
Shen, The Principles of Nonlinear Optics, pp. 187-192 (John Wiley and Sons 1984).
Yarviv and Yeh, Optical Waves in Crystals, pp. 333-336 (John Wiley and Sons 1984).
Yeh, Exact Solution of a Nonlinear Model of Two-Wave Mixing in Kerr Media, Journal of the Optical Society of America B, vol. 3, page 747 (1986).
Khoshnevisan Mohsen
Yeh Pochi A.
Deinken John J.
Hamann H. Fredrick
LaRoche Eugene R.
Rockwell International Corporation
Shingleton Michael B.
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