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Optical Switching Characteristics in Slightly Nondegenerated Multilayered Couplers Using Acousto-Optic Interaction by Surface Acoustic Waves
Nobuo GOTO Yasumitsu MIYAZAKI Yasuo AKAO
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1983/07/25
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Optical and Quantum Electronics
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Experiments of acousto-optic interaction in slightly nondegenerated couplers are firstly demonstrated with comparison to the theoretical results. The switching mechanism is based on the even-odd mode conversion by acousto-optic effects and on the mode splitting in the separating branch. The device consists of ZnS/Ta2O5/Nb2O5 thin films on Y-cut LiNbO3 substrates of propagation in the X direction. Surface acoustic waves of approximately 0.5 W, 71.2 MHz switch optical power about 90 percent. The frequency characteristics agree well with the theoretical results. These experiment characteristics may give the design base of useful tunable optical filters and multi-wavelength separators.