Variable acoustical deflection of an optical wave in an optical

Details Variable acoustical deflection of an optical wave in an optical Variable acoustical deflection of an optical wave in an optical

1987-11-27

1990-05-29

Gonzalez, Frank

350 9614, G02B 610

Patent

active

049290428

ABSTRACT:
An optical deflecting apparatus comprises a first generator for generating a first surface acoustic wave which advances to intersect an optical path of a guided optical wave advancing inside of an optical waveguide and diffracts and deflects the guided optical wave, and a second generator for generating a second surface acoustic wave which advances to intersect the optical path of the guided and diffracted optical wave and diffracts and deflects the guided and diffracted optical wave in a direction that amplifies the deflection caused by the diffraction. The first and second surface acoustic wave generators are formed to continuously change the frequencies of the first and second surface acoustic waves and the directions of advance thereof while satisfying the conditions of k1+k1=k2 and k2+k2=k3 wherein k1 and k2 respectively denote wave vectors of the guided optical wave before and after being diffracted by the first surface acoustic wave, k3 denotes the wave vector of the guided optical wave after being diffracted by the second surface acoustic wave, and k1 and k2 respectively denote wave vectors of the first and second surface acoustic waves.

REFERENCES:
patent: 3919669 (1975-11-01), Hartemann
patent: 4425023 (1984-01-01), Matsumoto et al.
patent: 4455064 (1984-06-01), Kenan
patent: 4470661 (1984-09-01), Mastsumoto
patent: 4595253 (1986-06-01), Yamashita et al.
patent: 4735476 (1988-04-01), Heffner et al.
patent: 4815802 (1989-03-01), Nakamura
IEEE Transactions on Circuits and Systems, vol. CAS-26, No. 12, C. S. Tsai "Guided-Wave Acoustooptic Bragg Modulators for Wide-Band Integrated Optic Communications and Signal Processing" Dec. 1979, pp. 1072-1098.

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