Patent
1989-11-29
1991-03-26
Lee, John D.
350 9614, G02B 614
Patent
active
050023497
ABSTRACT:
An acousto-optica converter fabricated on x-cut (LiNbO.sub.3 and having an optical waveguide extending along the y-direction. An interdigital transducer is oriented at 5.degree. with respect to the y-direction in order to compensate for the acoustic walk-off on such an orientation. Such as integrated acousto-optical converter allows multiple stages of such converters so as to provide for (1) two-stage zero-frequency shifted converters and filters, (2) lasers using an acousto-optic filter as a tuning element, (3) polarization-independent converters in which the modes are divided, separately polarization converted, and recobined according to frequency, (4) and wavelength division multiplexing routing switches capable of simultaneously switching multiple channels.
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Cheung Kwok-Wai
Heffner Brian L.
Smith David A.
Bell Communications Research Inc.
Falk James W.
Guenzer Charles S.
Heartney Phan T.
Lee John D.
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