7 September 2006 Range detection through the atmosphere using Laguerre-Gaussian beams
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Abstract
For most radar or ladar systems range information is obtained from the time necessary for an electromagnetic pulse to propagate to a target and return to a receiving antenna. In contrast, we investigate a method that replaces temporal encoding of distance with spatial encoding. In particular, we use a self-referencing superposition of Laguerre-Gaussian beams to translate propagation distance into transverse rotation of cross-section of the beam intensity. We review the mathematical foundations of the technique and discuss models for simulating its performance in turbulent atmosphere. In addition, we present a simple technique to extract the rotation angle from a two-dimensional cross-section of the beam. Preliminary results indicate that the technique is robust with respect to propagation in a turbulent atmosphere.
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Canh Ly, Markus Testorf, Joseph Mait, "Range detection through the atmosphere using Laguerre-Gaussian beams", Proc. SPIE 6307, Unconventional Imaging II, 630704 (7 September 2006); doi: 10.1117/12.680856; https://doi.org/10.1117/12.680856
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