In this paper we demonstrate image processing techniques such as edge enhancement and
phase contrast by using an optically addressed liquid crystal spatial light modulator …

A photorefractive nonlinear joint-transform correlator is demonstrated by utilizing the
nonlinear intensity-dependent behavior of beam-fanning in a photorefractive barium titanate …

This work comprises the theoretical and numerical validations of experimental work on
pattern and defect detection of periodic amplitude and phase structures using four-wave …

Optical implementation of an adder of arithmetic units that processes binary numbers is
outlined. Dynamic range compression using biasing illumination in beam-fanning geometry …

In prior work, we exploited the nonlinearity inherent in four-wave mixing in organic
photorefractive materials for adaptive filtering. In this paper, we extend our work further and …

The nonlinearity inherent in four-wave mixing in photorefractive (PR) materials is used for
adaptive filtering. Examples include script enhancement on a periodic pattern, scratch and …

Photorefractive media exhibit photon induced refractive index changes through a unique
series of processes. The photoexcitation and subsequent transport of charge carriers give …

We describe the process of adaptive self-inversion of an image (nonlinear switching) of
smallscale opaque object, when the amplitude-modulated laser beam, which illuminates it …

Описан процесс адаптивного самоинвертирования изображения (нелинейного
переключения) мелкомасштабного непрозрачного объекта при фокусировке …

A numerical simulation of the inverse image formation of opaque objects by focusing the
transmitted radiation into the absorbing medium is performed. It is shown that the process …