Abstract
Coupling of two counterpropagating coherent light waves in tin hypothiodiphosphate (Sn2P2S6, SPS) is usually strongly inhibited because of severe space charge limitations. Analysis of two-beam coupling gain is performed for different orientations of the grating vector in this monoclinic crystal that takes into account the anisotropy of dielectric permittivity. Gain enhancements are predicted and demonstrated experimentally for several nontraditional orientations of counterpropagating waves.
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Shumelyuk, A., Volkov, A., Odoulov, S. et al. Coupling of counterpropagating light waves in low-symmetry photorefractive crystals. Appl. Phys. B 100, 101–108 (2010). https://doi.org/10.1007/s00340-010-3998-6
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DOI: https://doi.org/10.1007/s00340-010-3998-6