Abstract
In recent years, there has been growing interest in extending the spectral working range of photorefractive oxides into the near infrared. Since the first experimental observation of photorefractive self-pumped phase conjugation (SPPC) at near-infrared wavelengths in so-called blue BaTiO3,1 great efforts have been devoted to investigating the infrared response of BaTiO3. It was realized that the blue color and the photorefractive sensitivity in the near infrared are results of the rhodium doping.2 KNbO3 has been demonstrated as an important nonlinear optical material for both frequency conversion and photorefraction.
© 1995 Optical Society of America
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