There are several types of optical materials that exhibit nonlinear properties. The research
work reported in this thesis is focused on two of its kind, namely, the inorganic …

A beam of light can be made to interact with other light beams through a nonlinear response
of an optical medium. The potential of photorefractive media in optical processing is …

The fIrst observation of the photorefractive effect was reported by AsHIaN et al.[1] in 1966
while investigating electro-optic and nonlinear properties of LiNbOa• It was first considered …

In recent years, several nonlinear optical experiments performed on barium titanate have
shown that the response time of such material can acquire an l− x dependence. 1 The …

Over the past several years, a new field of interest has emerged in coherent and nonlinear
optics. This field includes the possibility of performing operations in real time and with low …

From the Publisher: In recent years, optical computing and optical neural networks research
has enriched the field originally known as optical signal processing. Optical Signal …

We have developed an optical neurocomputer for implementing neural networks based on
real-time holography in photorefractive materials. Optical techniques show great promise for …

The photorefractive effect is a nonlinear optical phenomenon in which the local index of
refraction of a material is changed by the spatial variation of the incident light intensity. Since …

Incoherent optical pattern recognition has been demonstrated with a simple setup using
photorefractive BaTiO 3 crystals. The input patterns to be identified can be transmitted into …