Abstract
Holographic techniques have traditionally been used in the spatial domain for storage and recall of images and to perform signal processing operations, such as two- dimensional correlations for pattern recognition applications. Recent experiments have demonstrated the possibility of extending holography into the ultrafast time domain, in order to store, recall, and process picosecond and femtosecond optical waveforms.1-5 Examples of signal processing in the ultrafast time domain include time-reversal, an operation only possible by using nonlinear techniques such as holography, and matched filtering for optimal compression of phase- modulated input signals.
© 1993 Optical Society of America
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