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Time-domain image processing using dynamic holography
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DOI：10.1109/2944.686739.png)
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Coded ultrafast optical pulses can be treated as one-dimensional (1-D) images in the time domain. We have converted space-domain images into time-domain images using diffraction from dynamic holograms inside a Fourier pulse shaper, with photorefractive quantum wells (QW's) used as the dynamic holographic medium. We present several examples, in which amplitude or phase modulation of the hologram writing beams modifies the complex spectrum of the femtosecond output, resulting in a time-domain image, Both storage and processing of time domain images can be achieved, depending on the hologram writing geometry and power densities. Time-domain processing operations such as edge enhancement, Fourier transform, and correlation are demonstrated.
Keyword:
holography
image processing
nonlinear optics
optical pulse shaping
optical signal processing
quantum-well devices
ultrafast optics
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