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Influence of alternating field frequency on enhanced photorefractive gain in two-beam coupling

Abstract : We derive an analytic expression describing the intensity and field frequency dependence of photorefractive gain in two-beam coupling under an alternating square-wave electric field. We determine the frequency and intensity ranges over which the gain is maximum and time independent. Experimental results for Bi12GeO20 crystals are presented.
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https://hal-iogs.archives-ouvertes.fr/hal-00856623
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Claudine Besson, Jean-Michel Jonathan, André Villing, Gilles Pauliat, Gérald Roosen. Influence of alternating field frequency on enhanced photorefractive gain in two-beam coupling. Optics Letters, Optical Society of America, 1989, 14 (24), pp.1359-1361. ⟨hal-00856623⟩

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