Using a nominally undoped crystal of photorefractive BaTiO3, we have examined self-pumped phase conjugation at near-infrared wavelengths. We report reflectivities as high as 74% between 720 and 800 nm. As expected, the crystal response time increases significantly at longer wavelengths. We believe that this value of reflectivity in the self-pumped geometry is the highest reported nominally undoped crystal.
© 1992 Optical Society of America
Graeme W. Ross and Robert W. Eason, "Highly efficient self-pumped phase conjugation at near-infrared wavelengths by using nominally undoped BaTiO3," Opt. Lett. 17, 1104-1106 (1992)