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Self-pumped phase conjugation in the red in photorefractive Ba0.5Sr1.5K0.25Na0.75Nb5O15 and Sr0.6Ba0.4Nb2O6 with cerium in 9-fold coordinated sites

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Abstract

Self-pumped phase conjugation has been observed at selected laser wavelengths over the range 647–780 nm. Phase-conjugate reflectivities as great as 20% were measured for power levels ranging from 2 to 100 mW. In addition, phase-conjugate and beam-fanning response times were also measured. Our observations were carried out in crystals belonging to the tungsten-bronze family; these crystals were doped with cerium at the 9-fold coordinated lattice sites to give a red photorefractive response.

© 1988 Optical Society of America

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