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Sensitivity of Photo-Elastic Nd-YAG Laser for Small Force Sensing

Authors:
Khelifa Naceur-Eddine
Himbert Marc

Keywords: solid-state laser; photo-elastic effect; force sensor; beat frequency; sensitivity.

Abstract:
The sensitivity of a force sensor based on photo-elastic effect in a monolithic Nd-YAG laser depends strongly on the geometrical shape and dimensions of the laser medium. The theoretical predictions of sensitivity are in good agreement with first results obtained with a cylindrical crystal of (4x4) mm and some values reported by other groups. However, for small size of the laser sensor, the developed model predicts sensitivity, about 30 % higher than the values given by available experiments. In this paper, we present experimental results obtained with a force sensor using a monolithic cylindrical Nd-YAG laser of dimensions (2x3) mm with suitable optical coatings on its plane end faces. The new measure of sensitivity has allowed us to refine the theoretical model to treat photo-elastic sensors with small dimensions.

Pages: 43 to 47

Copyright: Copyright (c) IARIA, 2014

Publication date: November 16, 2014

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-375-9

Location: Lisbon, Portugal

Dates: from November 16, 2014 to November 20, 2014