Semiconductors provide some of the most promising materials for nonlinear optics, because
of large resonant nonlinearities, control of recombination time (from milliseconds to …

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

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We found that the formation of self-pumped phase-conjugate mirrors SPPCM in
photorefractive Bi12TiO20 crystals under external alternating electric field is accompanied …

Previous theoretical models for linear and ring self-pumped phase-conjugate mirrors are
reviewed and modified to include the effects of linear absorption. The nonlinear …

A self‐pumped phase conjugate reflectivity of 74.8% is obtained with a suitably cut KNbO3:
Fe crystal in a polygonal shape. The design and operation of this self‐pumped phase …

A theoretical analysis of the behavior of the frequency/phase noise of semiconductor lasers
with external phase conjugate feedback is presented. It is shown that the frequency noise is …

We report on photorefractive two-beam coupling in proton-implanted Fe-doped KNbO_3
waveguides at wavelengths from 632.8 to 1550 nm. Exponential gain coefficients of 11 and …

In this paper we review four photorefractive devices which have been investigated and
further developed in our laboratories. We discuss the fundamental behavior of a …

A family of self-pumped four-wave mixing-based geometries for conjugation and mutual
conjugation of light beams is analyzed in the framework of a three-dimensional theory …