Noise reduction using adaptive spatial filtering in photorefractive two-beam coupling
- 15 May 1991
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 16 (10) , 747-749
- https://doi.org/10.1364/ol.16.000747
Abstract
We present an optical signal-processing technique for additive noise reduction that uses the noisy signal and a Gaussian reference beam to produce an adaptive Wiener filter. We experimentally demonstrate an improvement from 1 to 8 in the signal-to-noise ratio by using nonlinear gain in two-beam coupling in barium titanate to transmit 50% of the signal and 6% of the noise.Keywords
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