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Applied Optics

Applied Optics


  • Vol. 16, Iss. 5 — May. 1, 1977
  • pp: 1297–1304

Efficient wideband guided-wave acoustooptic Bragg diffraction using phased surface acoustic wave array in LiNbO3 waveguides

L. T. Nguyen and C. S. Tsai  »View Author Affiliations

Applied Optics, Vol. 16, Issue 5, pp. 1297-1304 (1977)

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Efficient wideband guided-wave acoustooptic Bragg diffraction has been demonstrated using a phased surface acoustic wave array in Y-cut LiNbO3 waveguides. The results of measurement made on the devices which employ the first-order acoustic beam steering from six-element phased-SAWs of relatively small total acoustic aperture, at the center frequency of 325 MHz, have shown that accurate tracking of the Bragg condition is achievable for a frequency band of more than 250 MHz. In one of the deflectors that employ a larger total acoustic aperture, only 68 mW of electric drive power or 3.5 mW of acoustic power was required to diffract 50% of the light over a bandwidth of 112 MHz. This bandwidth is a nearly sixfold increase over that of the deflector that employs a single SAW of identical aperture. The quality of both deflected and undeflected light beams was very good.

© 1977 Optical Society of America

Original Manuscript: February 17, 1976
Published: May 1, 1977

L. T. Nguyen and C. S. Tsai, "Efficient wideband guided-wave acoustooptic Bragg diffraction using phased surface acoustic wave array in LiNbO3 waveguides," Appl. Opt. 16, 1297-1304 (1977)

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