Highly efficient self-pumped phase conjugation at near-infrared wavelengths by using nominally undoped BaTiO(3).
Using a nominally undoped crystal of photorefractive BaTiO(3), 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.
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