Abstract
We present theoretical and experimental analyses of the signal-to-noise ratio
(SNR) of photorefractive two-wave mixing detection that uses BaTiO3.
The influence of beam fanning is taken into account in the detection process.
Different known methods to enhance the SNR of the detection are theoretically
and experimentally compared. A 10-fold improvement of the SNR is obtained, and
the detection of a 1-pW signal intensity for a SNR of 50 is achieved for two of
them.
© 1995 Optical Society of America
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