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Proceedings Paper

New microwave modulation LIDAR scheme for naval mine detection
Author(s): Nour Alem; Fabrice Pellen; Bernard Le Jeune
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Paper Abstract

In this paper, a new modulator design suited for hybrid Lidar-radar applications is proposed and implemented. This modulator delivers a stable and tunable modulated optical pulse. Modulation frequency is in the GHz range, and associated with a bandpass filtering at the detection allow detecting a target echo embedded in the backscattering noise. This principle is known as hybrid Lidar-radar. We expose in this article theoretical principle of this new modulator and its experimental implementation. As polarization filtering can be coupled with the hybrid Lidar-radar technique to further improve target return, polarimetric sensitivity of this modulator was investigated. Since, theoretical results mismatched the experimental ones, thus, further investigations were taken. Mechanical constraint induced by mirror mount caused birefringent behavior to the mirror substrate. As this effect was not homogeneously distributed in the material, we were not being able to compensate it by modelling. However, we propose an experimental approach to solve this problem.

Paper Details

Date Published: 5 October 2017
PDF: 8 pages
Proc. SPIE 10434, Electro-Optical Remote Sensing XI, 1043403 (5 October 2017);
Show Author Affiliations
Nour Alem, OPTIMAG-IBSAM (France)
Fabrice Pellen, OPTIMAG-IBSAM (France)
Bernard Le Jeune, OPTIMAG-IBSAM (France)

Published in SPIE Proceedings Vol. 10434:
Electro-Optical Remote Sensing XI
Gary Kamerman; Ove Steinvall, Editor(s)

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