Photorefractive materials combine photoconductive and electro-optic properties: light affects
their electrical conductivity; their optical properties (refractive index, etc.) are affected by …

This book describes the processes of optical information recording in photorefractive crystals
and applications of these materials in phase-conjugating devices, holographic …

This article addresses the development of and recent advances in the rapidly growing field
of optical pattern recognition. In optical pattern recognition there are two basic approaches; …

A novelty filter detects what is new in a scene and may be likened to a temporal high-pass
filter. The current status of optical novelty filters and related devices, based upon four-wave …

In recent years, there has been a rapid expansion in the field of nonlinear optics as weIl as
in the field of neural computing. Up to date, no one would doubt that nonlinear optics is one …

A review is given of the present status of the non-linear optical materials and devices, and
their applications for optical signal processing and computing. The primary motivation …

We have characterized the photorefractive performance of a special 45°-cut crystal of
BaTiO_3 and compared it with the conventional 0°-cut material. An increased peak gain …

A method for obtaining a high-contrast visible-light signal from infrared absorption in low-
absorbance samples is described. This method is based on a beam-fanning optical limiter in …

A type of adaptive correlation filter for processing the speckle pattern emerging from an
interference fiber-optic sensor is proposed. This filter is simple and self-adjustable, operating …

We report the performance of a holographic set-up with a Bi12SiO20 (BSO) photorefractive
crystal for measuring vibration amplitudes in a time average holography system. The volume …