He Guangsheng. Enhanced refractive-index change of medium by two-beam resonance-coupling[J]. Chinese Journal of Lasers, 1987, 14(3): 136
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Resonance enhanced refractive-index change induced by two incident beams of different frequencies is discussed. The expressions of the coupled nonlinear refractive-index change are given for the sum-frequency and difference-frequency two-photon resonance conditions. Some experimental results of calcite, fused quartz fibre and benzene samples are discussed briefly.