Abstract

A fiber-optic single-sideband frequency shifter using a grating acoustic scanner has been demonstrated. By using the surface-wave-to-bulk-wave conversion mechanism of a LiNbO₃ scanner, a traveling acoustic bulk wave with a frequency of approximately 42 MHz was generated and was incident at an angle upon an optical fiber. This angle is adjustable by changing the surface-wave frequency to produce phase-matched coupling between two polarization modes or two spatial modes of light in the fiber. An optical coupling efficiency of approximately 70% and carrier and image sideband suppression of 18 and 35 dB, respectively, were realized.

© 1987 Optical Society of America

Fiber-optic frequency shifter using a surface acoustic wave incident at an oblique angle

W. P. Risk, G. S. Kino, and H. J. Shaw
Opt. Lett. 11(2) 115-117 (1986)

All-fiber acousto-optic frequency shifter excited by focused surface acoustic waves

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Opt. Lett. 16(1) 24-26 (1991)

All-fiber acousto-optic frequency shifter

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Opt. Lett. 11(6) 389-391 (1986)

Acousto-optic fiber-optic frequency shifter using periodic contact with a copropagating surface acoustic wave

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All-fiber optical frequency shifter

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