Demonstration of a spatial-spectral holographic LIDAR range-Doppler processor |
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Authors: | Friso Schlottau Youzhi Li |
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Affiliation: | a Inphase Technologies, 2000 Pike Road, Longmont, CO 80501, USA b OCS, Department of Electrical and Computer Engineering, University of Colorado, Boulder, CO 80309-0425, USA |
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Abstract: | We present a new approach to laser interferometric Doppler and ranging (LIDAR) processing using spatial-spectral holography (SSH). In this approach, broadband optical signals from a random noise or frequency-modulated laser are transmitted and reflected off remote targets. The return signals interfere spatially and spectrally with a local copy of the original transmit signal in an SSH medium, resulting in spectral gratings that have a spectral period inversely proportional to the LIDAR target's range and a position proportional to the target's Doppler (or velocity). These gratings are subsequently read out by a slowly chirped source onto a parallel detector array, and the velocity and range of the targets are inferred. We present the theoretical framework that describes the function of the LIDAR processor, as well as proof-of-concept experimental results. |
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Keywords: | 42.50.Md 42.79.Hp 42.30.Kq 42.40.Ht 42.40.My 42.79.Jq |
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