An underwater fiber optics Lidar for the characterization of sea water and ice properties

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Authors
  1. Roy, G.
  2. Matthieu, P.
  3. Cao, X.
  4. Cinq-Mars, A.
  5. Roy, S.
  6. Fournier, G.
  7. Marec, C.
Corporate Authors
Defence Research and Development Canada, Valcartier Research Centre, Quebec QC (CAN);Laval Univ, Quebec QUE (CAN)
Abstract
This paper bears on the subject of the development, modeling and testing of the Harsh Environment Lidar, HEL. The lidar head is designed to go underwater and consists of four telescopes that are connected to the detection and emission unit via five fused silica optical fibers. Three telescopes are used for data collection, while the forth is used for laser emission. The laser source and the detection unit are located on a surface vessel. The laser beam is injected into a 100 ìm in diameter optical fiber. The collimation of the laser beam is done in the lidar head via a 25 mm in diameter 45 mm focal length lens; the laser beam is linearly polarized using a polarization beam splitter. A 50 mm receiving telescope co-aligned with the laser beam is used for linear depolarization measurements. A second 50 mm telescope is used to collect off-axis scattered light while a third 50 mm telescope is used to collect inelastic scattered radiation (raman and induced fluorescence signal).
Keywords
lidar;underwater;ice
Report Number
DRDC-RDDC-2015-N028 — External Literature
Date of publication
24 Dec 2015
Number of Pages
4
DSTKIM No
CA041846
CANDIS No
802913
Format(s):
Electronic Document(PDF)

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