8 July 2003 Wide-field coherence gated imaging: photorefractive holography and wide-field coherent heterodyne imaging
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Abstract
We present a characterization of high-speed wide-field coherence-gated imaging using photorefractive holography with GaAs/AlGaAs Photorefractive Multiple Quantum Well (PRWQ) devices. Results are obtained with broadband c.w. laser illumination. The limitations of photorefractive holography using PRQW devices in our non-degenerate four-wave mixing geometry are discussed in terms of typical PRQW device parameters. We discuss the effect of the sensitivity and dynamic range of the CCD camera used to record the diffracted image and how the performance of PRQW devices may be improved in the future. We also present a spatial multiplexing technique for achieving phase-stepped single-shot wide-field coherence-gated imaging using a single CCD camera.
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Christopher W. Dunsby, Yan Gu, David D. Nolte, Michael R. Melloch, Paul M. W. French, "Wide-field coherence gated imaging: photorefractive holography and wide-field coherent heterodyne imaging", Proc. SPIE 4956, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VII, (8 July 2003); doi: 10.1117/12.478993; https://doi.org/10.1117/12.478993
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