John J. Zayhowski

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M.I.T. Lincoln Laboratory is actively developing laser and detector technologies that make it possible to build a three-dimensional laser radar (3-D ladar) with several attractive features, including capture of an entire 3-D image on a single laser pulse, tens of thousands of pixels, few-centimeter range resolution, and small size, weight, and power(More)
351 L     three-dimensional (3D) laser radars (ladars) with attractive features that include capture of an entire 3D image with a single laser pulse, image resolution of tens of thousands of pixels, range resolution of a few centimeters, and small size. The laser technology for the ladar is based on diode-pumped solid-state(More)
We have developed a threedimensional imaging laser radar featuring 3-cm range resolution and single-photon sensitivity. This prototype direct-detection laser radar employs compact, all-solid-state technology for the laser and detector array. The source is a Nd:YAG microchip laser that is diode pumped, passively Q-switched, and frequency doubled. The(More)
III Lincoln Laboratory has developed tunable, single-frequency microchip lasers fabricated from Nd-doped solid state crystals. Diode-laser-pumped Nd:YAG microchip lasers have linewidths ofless than 7 kHz at center frequencies of 1.064 and 1.319 J.1m, and have operated in a single-frequency, single-polarization, fimdamental transverse mode at output powers(More)
We have recently conducted a series of laboratory and field tests to demonstrate the utility of combining active illumination with hyperspectral imaging for the detection of concealed targets in natural terrain. The active illuminator, developed at MIT Lincoln Laboratory, is a novel microlaser-pumped fiber Raman source that provides high-brightness,(More)
The experiments with visible light or 0.85 [L light on coupled waveguides and waveguide interferometers fabricated in LiNbO 3 are plagued by the photorefractive effect, in particular if optical nonlinearities in these waveguides are used intentionally, as in the all-optical waveguide modulator.' In her experiments on optical waveguide interferometers, A.(More)
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