Abstract
Liquid crystal writable grating technology is being developed for beam steering in laser radar systems. To date, steering of 10.6 micrometers , 1.06 micrometers , and 0.53 micrometers wavelengths has been demonstrated. Preliminary results are described. In this paper we also consider the ability of writable gratings to steer broad spectral band radiation for use in passive sensors. We find that there is potential for these devices in microscan systems because there is little or no dispersion for the small scan angles required in microscanning. The dispersion that is present is less than the resolution of the sensor considered here. For large angle steering we find that dispersion correction or a narrowing of the spectral bandwidth is required. Approaches for dispersion correction and post-detection compensation are discussed.
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