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Adaptive optical networks using photorefractive crystals.
The capabilities of photorefractive crystals as media for holographic interconnections in neural networks are examined and optical architectures for implementing various neural schemes are described. Expand
Pulsed ultrasound-modulated optical tomography using spectral-hole burning as a narrowband spectral filter.
- Youzhi Li, Huiliang Zhang, Chulhong Kim, K. Wagner, P. Hemmer, Lihong V. Wang
- Materials Science, Medicine
- Applied physics letters
- 7 July 2008
The experimental results show that this technique, having the largest etendue among all available ultrasound-modulated optical tomography techniques and being immune to speckle decorrelation, offers potential for imaging in vivo and forming high resolution optical tomograms in real time. Expand
Spectral hole burning for wideband, high-resolution radio-frequency spectrum analysis.
- E. Schlottau, M. Colice, K. Wagner, W. Babbitt
- Materials Science, Medicine
- Optics letters
- 15 November 2005
The first spectral-hole-burning based rf spectrum analyzer to cover 10 GHz of rf analysis bandwidth and provide 43 dB of dynamic range is presented. Expand
Doppler encoded excitation pattern tomographic optical microscopy.
A high-speed wide-field approach to imaging is described and demonstrated that measures the complex spatial Fourier transform of the object by detecting its spatially integrated response to dynamic acousto-optically synthesized structured illumination. Expand
Real-Time Optical Synthetic Aperture Radar (Sar) Processor
A real-time optical synthetic aperture radar (SAR) processor is described. The processor utilizes an acousto-optic device as the input electronic-to-optical transducer and a CCD camera that serves as… Expand
Optical competitive learning with, VLSI/liquid-crystal winner-take-all modulators.
Beam-propagation simulations are used to show that the holographic optical learning network faithfully reproduces the behavior of the ideal competitive learning algorithm. Expand
Winner-take-all neural net with memory
Optically switchable pnpn semiconductor devices have been connected in parallel with a common load resistance. When illuminated, only that device with maximum input will turn on. The voltage across… Expand
Demonstration of a continuous scanner and time-integrating correlator using spatial–spectral holography
Abstract We present a new approach to time-integrating correlation using spatial–spectral holography in which an optically modulated temporal input is spatially scanned by diffracting it from an… Expand
Focusing and scanning through scattering media in microseconds
Recent advances in computational wavefront shaping have made optical focusing through scattering media a reality. However, most current techniques are too slow to focus, much less image through… Expand
Modeling of femtosecond pulse interaction with inhomogeneously broadened media using an iterative predictor corrector FDTD method.
We present a one-dimensional iterative predictor-corrector finite-difference time-domain method for modeling of broadband optical pulse propagation and interaction with inhomogeneously broadened… Expand