Share Email Print

Optical Engineering

Vibration compensation technique for an optical current transducer
Author(s): Pawel Niewczas; Andrew Cruden; W. Craig Michie; Iain W. Madden; James R. McDonald
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Details are presented on a technique for compensation of vibration-induced noise in an optical current transducer (OCT). The light intensity changes that result from vibration are reciprocal, i.e., their magnitude does not depend on the direction of light propagation. However, intensity changes that result from the Faraday rotation induced as the light travels through the OCT are dependent on the direction of propagation and hence, by using two counter-propagating beams, vibration- induced intensity noise can be canceled by applying simple signal processing. This solution also enables true dc current measurement to be made. The principles of operation of the compensation method an experimental evaluation of the system are presented and the limitations associated with the compensation scheme are discussed.

Paper Details

Date Published: 1 October 1999
PDF: 7 pages
Opt. Eng. 38(10) doi: 10.1117/1.602296
Published in: Optical Engineering Volume 38, Issue 10
Show Author Affiliations
Pawel Niewczas, Univ. of Strathclyde (United Kingdom)
Andrew Cruden, Univ. of Strathclyde (United Kingdom)
W. Craig Michie, Univ. of Strathclyde (United Kingdom)
Iain W. Madden, Univ. of Strathclyde (United Kingdom)
James R. McDonald, Univ. of Strathclyde (United Kingdom)

© SPIE. Terms of Use
Back to Top