Range detection through the atmosphere using Laguerre-Gaussian beams

Canh Ly; Markus Testorf; Joseph Mait

doi:10.1117/12.680856

7 September 2006 Range detection through the atmosphere using Laguerre-Gaussian beams

Canh Ly, Markus Testorf, Joseph Mait

Proceedings Volume 6307, Unconventional Imaging II; 630704 (2006) https://doi.org/10.1117/12.680856
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Canh Ly, Markus Testorf, and Joseph Mait "Range detection through the atmosphere using Laguerre-Gaussian beams", Proc. SPIE 6307, Unconventional Imaging II, 630704 (7 September 2006); https://doi.org/10.1117/12.680856

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