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Peculiarities of Degenerate Four-Wave Mixing in a LiquidCrystal Cell in Dynamic Photorefractivity Mode
Abstract
The features of degenerate four-wave mixing (DFWM) in a nematic liquid-crystal cell with photoconductive orienting layers are studied. To establish the vector diagram of the interaction of waves, a method was used according to which three plane waves at angles to each other are incident on the nonlinear medium. The probe wave interferes with two forward-pump waves, which, after passing through the cell, are reflected backward by two mirrors. A vector model is proposed that is in good agreement with the experimental results obtained. Its main difference from the standard DFWM diagram is that the vector of the refractive index grating, on which the wavefront is effectively conjugated in the dynamic photorefractivity mode, is at an angle to the vector of the optical interference grating. The experiment in the dynamic photorefractive mode demonstrated good correction of spherical and astigmatic aberrations, equivalent to the action of a lens with a focal length of less than 10 cm.
About the Authors
A. V. Agashkov
В. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Minsk
A. M. Varanetski
В. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Minsk
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Review
For citations:
Agashkov A.V., Varanetski A.M. Peculiarities of Degenerate Four-Wave Mixing in a LiquidCrystal Cell in Dynamic Photorefractivity Mode. Zhurnal Prikladnoii Spektroskopii. 2024;91(1):146-153. (In Russ.)
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