Abstract
We provide a theoretical investigation of temperature effects on one-dimensional modulation instability of broad optical beams in photorefractive crystals. Those physical factors related to the temperature effect, i.e., the dielectric constant, diffusion process and the dark irradiance, are considered. Our results show that, for non-centrosymmetric crystals, the dark irradiance dominates the temperature dependence of modulation instability; however, the dielectric constant temperature-dependence dominates the process in centrosymmetric photorefractive crystals. Relevant examples are provided.
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