Abstract
We report the first observation to our knowledge of self-pumped phase conjugation in BaTiO3 at 1.06 μm. An essential feature is the lower threshold external ring configuration rather than total internal reflection geometry. Although the product of incident power (1 W/cm2) and formation time (600 sec) is much larger than the corresponding values at 0.80 μm (0.15 W/cm2; 120 sec), the effect was observed in two crystals purchased more than a year apart and poled at separate facilities.
© 1985 Optical Society of America
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