Tunable acousto-optic filter utilizing internal mode conversion

Details Tunable acousto-optic filter utilizing internal mode conversion Tunable acousto-optic filter utilizing internal mode conversion

1984-09-28

1988-01-19

Arnold, Bruce Y.

350358, G02F 111

Patent

active

047201770

ABSTRACT:
An electronically tunable optical filter utilizing noncollinear acousto-optic interaction in a birefringent crystal. Light is diffracted by a secondary acoustic wave generated from a primary acoustic wave by mode conversion at an internal surface of the birefringent crystal. A preferred configuration is described in which the primary acoustic wave is excited by acoustical transducers bonded to the same face as the optical aperture. The configuration has the advantages of simpler construction and improved performance.

REFERENCES:
patent: 3679288 (1972-07-01), Harris
patent: 3953107 (1976-04-01), Yano et al.
patent: 4052121 (1977-10-01), Chang
patent: 4342502 (1982-08-01), Chang

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