Abstract

We present a method for binary phase spatial modulation that uses photoinduced anisotropy in a chalcogenide amorphous As₂S₃ thin film and its application to binary phase-only filters in a VanderLugt optical correlator. The time-dependent light-transmission properties of the photoilluminated As₂S₃ thin film are analytically examined by use of third-order nonlinear polarization theory. Experimental results on optical correlation are discussed.

© 1995 Optical Society of America

Nonlinear optical image processing in photoanisotropic amorphous As₂S₃ thin film

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Phase conjugation in an amorphous As₂S₃ thin film

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