Abstract
The intensity dependence of the photorefractive response of Sn2P2S6 is studied for the Kr+-laser wavelength of 647 nm and pump-beam intensities of up to 10 W/cm2. A considerable enhancement of the two-beam coupling gain factor with increasing intensity at a grating spacing of ≃1 μm is attributed to a light-induced increase of the effective trap density. The large gain reached at high intensities is applied for the build up of a double phase conjugate mirror with a sub-millisecond switch-on time.
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Shumelyuk, A., Wesner, M., Imlau, M. et al. Wave mixing in nominally undoped Sn2P2S6 at high light intensities. Appl. Phys. B 95, 497–503 (2009). https://doi.org/10.1007/s00340-009-3405-3
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DOI: https://doi.org/10.1007/s00340-009-3405-3