Optical: systems and elements – Optical modulator – Light wave directional modulation
Patent
1993-02-26
1994-11-01
LaRoche, Eugene R.
Optical: systems and elements
Optical modulator
Light wave directional modulation
359285, 359287, 359313, G02F 134
Patent
active
053611594
ABSTRACT:
Devices for deflecting an optical beam under the action of an ultrasonic beam propagating in a block of active acousto-optical material and operating under Bragg tangential conditions, with the acousto-optical interaction being anisotropic. The devices also include entry and exit faces into this material blocks which are inclined at angles .alpha. and .beta. such that the incoming beam and the emerging beam after the interaction are significantly parallel, keeping operation under Bragg tangential conditions. The devices can also be used to make a spectrum analyzer with a very large number of points and very high dynamics.
REFERENCES:
patent: 3944334 (1976-03-01), Yano et al.
patent: 4037933 (1977-07-01), Yano et al.
patent: 4040722 (1977-08-01), Nielsen
patent: 4232952 (1980-11-01), Barta et al.
patent: 4257685 (1981-03-01), Barta et al.
patent: 4659184 (1987-04-01), Sohn et al.
Poncot Jean-Claude
Rosolen Carlo
"Thomson-CSF"
LaRoche Eugene R.
Nguyen Tan
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