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半导体光子学与技术:英文版

Intensity Dependence of Stationary Energy Transfer in Codirectional Photorefractive Two—wave Mixing

LIUJinsog, LIANGChanghong

Published Jan 1, 1996• 0 citations
OpenAlex

Abstract

The intensity and phase formulas that are valid for the saturation and inter-mediate regime(before saturation)are derived,and the analytical expressions with the ration of saturation intensity to total incident intensity as their explicit variable are obtanied.The intensity depenence of stationary energy transfer in photorefractive acodirectional two-wave mixing is examined.It is necessary to using these formulas in some problems,such as the temperature of intensity dependence of two-wave mixing.A method of measuring exponen-tial gain coefficient is presented,which is suitable for two-wave mixing in intermediate regime.

Related papers

Intensity Dependence of Stationary Energy Transfer in Codirectional Photorefractive Two-wave Mixing

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The intensity and phase formulas that are valid for the saturation and intermediate regime (before saturation) are derived, and the analytical expressions with the ratio of saturation intensity to total incident intensity as their explicit variable are obtained. The intensity dependence of stationary energy transfer in photorefractive codirectional two-wave mixing is examined. It is necessary to using these formulas in some problems, such as the temperature or intensity dependence of two-wave mixing. A method of measuring exponential gain coefficient is presented, which is suitable for two-wave mixing in intermediate regime.

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Intensity dependence of stationary energy transfer in codirectional photorefractive cross-polarization two-wave mixing

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The intensity dependence of stationary energy transfer in photorefractive codirectional cross-polarization two-wave mixing is examined. The intensity formulae remained effect both in the saturation and the intermediate regime (before saturation) are driven, and the analytical expressions with the ratio of saturation intensity to total incident intensity as their explicit variable are obtained for the case of pump depletion. It is necessary to use these formulae in some problems, such as the temperature or intensity dependence of cross-polarization two-wave mixing. A method of measuring the coupling coefficient and saturation intensity of a cubic photorefractive crystal is presented, which is suitable for cross-polarization two-wave mixing in the intermediate regime.

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Two- and four-wave mixing with saturable absorption and gain

Dejan V. Timotijević, Milivoj R. Belić, Robert W. Boyd

An exact solution to a model of two- and four-wave mixing in photorefractive media with saturable gain and absorption is presented. Pump depletion effects are accounted for, and the procedure for matching two-point boundary conditions is given. Possibilities of multistable solutions are investigated, and procedures on how to deal with such situations are outlined. It is found that the energy transfer between waves is less effective in the nonsaturated regime as compared to the saturated regime. It is also established that the nonsaturated system is more stable than the saturated under the same conditions.>

IEEE Journal of Quantum Electronics•Jan 1, 1992•9 citations
The intensity and phase formulas that are valid for the saturation and inter-mediate regime(before saturation)are derived,and the analytical expressions with the ration of saturation intensity to total incident intensity as their explicit variable are obtanied.The intensity depenence of stationary energy transfer in photorefractive acodirectional two-wave mixing is examined.It is necessary to using these formulas in some problems,such as the temperature of intensity dependence of two-wave mixing.A method of measuring exponen-tial gain coefficient is presented,which is suitable for two-wave mixing in intermediate regime.
The intensity and phase formulas that are valid for the saturation and intermediate regime (before saturation) are derived, and the analytical expressions with the ratio of saturation intensity to total incident intensity as their explicit variable are obtained. The intensity dependence of stationary energy transfer in photorefractive codirectional two-wave mixing is examined. It is necessary to using these formulas in some problems, such as the temperature or intensity dependence of two-wave mixing. A method of measuring exponential gain coefficient is presented, which is suitable for two-wave mixing in intermediate regime.
The intensity dependence of stationary energy transfer in photorefractive codirectional cross-polarization two-wave mixing is examined. The intensity formulae remained effect both in the saturation and the intermediate regime (before saturation) are driven, and the analytical expressions with the ratio of saturation intensity to total incident intensity as their explicit variable are obtained for the case of pump depletion. It is necessary to use these formulae in some problems, such as the temperature or intensity dependence of cross-polarization two-wave mixing. A method of measuring the coupling coefficient and saturation intensity of a cubic photorefractive crystal is presented, which is suitable for cross-polarization two-wave mixing in the intermediate regime.
The effect of a position-dependent time constant on nondegenerate photorefractive two-wave mixing is analyzed. For codirectional two-wave mixing the results indicate that the bandwidth of the two-wave-mixing gain decreases when the medium becomes lossy and that the photorefractive phase shift depends on the loss of the medium. In contradirectional two-wave mixing the total local intensity strongly depends on the coupling even if the medium is lossless. Thus the bandwidth is dependent on the energy coupling.
An exact solution to a model of two- and four-wave mixing in photorefractive media with saturable gain and absorption is presented. Pump depletion effects are accounted for, and the procedure for matching two-point boundary conditions is given. Possibilities of multistable solutions are investigated, and procedures on how to deal with such situations are outlined. It is found that the energy transfer between waves is less effective in the nonsaturated regime as compared to the saturated regime. It is also established that the nonsaturated system is more stable than the saturated under the same conditions.>