Orthogonal geometry of wave interaction in a photorefractive crystal for linear phase demodulation |
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Authors: | Salvatore Di Girolamo Roman V Romashko Alexei A Kamshilin |
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Institution: | a University of Kuopio, Department of Physics, P.O. Box 1627, FIN-70211 Kuopio, Finland b Institute of Automation and Control Processes, FEB RAS, 5 Radio Str., Vladivostok 690041, Russia |
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Abstract: | We present a novel configuration of an interferometer which is implemented by using vectorial wave mixing in the orthogonal geometry of wave interaction in a cubic photorefractive crystal, for the detection of small phase transients. The orthogonal geometry of wave interaction allows the linear regime of the phase-to-intensity transformation even when phase transients are encrypted in a depolarized wave without using any polarizing element. The use of a depolarized beam without a polarizing element strongly diminishes the noise level, thus increasing the sensitivity to phase transients. |
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Keywords: | 42 25 Hz 42 40 Kw 42 40 Pa 42 40 Lx |
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