Abstract

Characteristics of high performance gallium phosphide Bragg cells are reported, including very high diffraction efficiencies and moderate bandwidths (for example, 45%/W, 530 MHz at 633 nm). Optical characteristics, including polarization dependence of acoustooptic diffraction efficiency, are considered explicitly. Design calculations are discussed and verified. Laser beam depolariation observed along the (1,0,−1) direction was found to affect the efficiency calculations. However, the depolarization effect could be isolated by considering an equivalent substrate configuration in which optical polarization was maintained. Then diffraction efficiency was accurately predicted by operating on the photoelastic tensor. Finally, possible models for optical effects observed in bulk GaP are outlined.

© 1984 Optical Society of America

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