Acousto-optic modulator

Details Acousto-optic modulator Acousto-optic modulator

G - Physics

02

F

345/57

G02F 1/11 (2006.01)

Patent

CA 1261048

ABSTRACT: An acousto-optic modulator for generating a modulated diffracted beam 14 from a laser beam 10 by refractive Bragg dif- fraction from a longitudinal compressional acoustic wave directed into a germanium block 21 by a transducer 2. By tilting the end face 26, 30, so that the angle of incidence is 44 degrees, all the acoustic wave energy is reflected as a shear wave S, at 27 degrees and then dissipated in layers 24 of indium or lead on the upper and lower surfaces 19, 22, of the block. The end face 26 is also disposed obliquely in plan angle to further reduce retroreflection.

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