Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1977-06-27
1978-11-21
Moskowitz, Nelson
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
350358, 250199, H01S 310, G02F 132
Patent
active
041268342
ABSTRACT:
An acousto-optic bulk wave Bragg cell having a transparent piezoelectric body and a single-layer interdigital transducer (IDT) signal input array on one surface of the body is adapted to be connected to a microwave (> 1 GHZ) energizing source for launching primarily bulk shear acoustic waves in the body transversely of the plane of the input surface. This Bragg cell is a signal transducer which converts the microwave input signal into an optical wavefront having spatial modulation directly proportional to the input signal and is utilized to diffraction modulate a laser beam directed through the cell transversely of the direction of acoustic wave propagation.
REFERENCES:
patent: 3055258 (1962-09-01), Hurvitz
patent: 3495894 (1970-02-01), Lenzo et al.
patent: 3736045 (1973-05-01), Heidrich et al.
patent: 3856378 (1974-12-01), Brandt et al.
patent: 4087764 (1978-05-01), Young
Shah, "Fast Acoustic Diffraction-Type Optical Waveguide Modulator", 11/15/73, pp. 556-568, Appl. Phys. Lett., vol. 23, #10, G-250.
Yano et al., "TeO.sub.2 Anisotropic Bragg Light Deflectors . . .," 1/15/75, App. Phys. Lett., vol. 26, #12, pp. 689-691, G-250.
Mitchell, "Spurious Bulk Wave Signals in Acoustic Surface Wave Devices", 11/74, pp. 313-320, IEEE Ultrasonics Symposium.
GTE Sylvania Incorporated
Lawler John F.
Moskowitz Nelson
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