摘要Based on Kukhtarev's equations, we derive the formulae of intensity-coupling coefficient, the phase-coupling coefficient and the group velocity at large modulation depth. It is theoretically shown that the signal beam can be amplified after passing through the photorefractive crystal and the group velocity reduced to m/s, even cm/s. Meanwhile, we also analyse the influence of the thermal excitation rate and the large signal effects on optical amplification and reduction of light propagation in photorefractive two-wave mixing.
Abstract：Based on Kukhtarev's equations, we derive the formulae of intensity-coupling coefficient, the phase-coupling coefficient and the group velocity at large modulation depth. It is theoretically shown that the signal beam can be amplified after passing through the photorefractive crystal and the group velocity reduced to m/s, even cm/s. Meanwhile, we also analyse the influence of the thermal excitation rate and the large signal effects on optical amplification and reduction of light propagation in photorefractive two-wave mixing.
(Other nonlinear optical materials; photorefractive and semiconductor materials)
引用本文:
ZHANG Yun-Dong;YE Jian-Bo;QIU Wei. Optical Amplification and Slow Light Based on Two-Wave Mixing at Large Modulation Depth[J]. 中国物理快报, 2007, 24(5): 1248-1251.
ZHANG Yun-Dong, YE Jian-Bo, QIU Wei. Optical Amplification and Slow Light Based on Two-Wave Mixing at Large Modulation Depth. Chin. Phys. Lett., 2007, 24(5): 1248-1251.
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2007, Vol. 24 
