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Proceedings Paper

Combined narrow-band and broad-band interferometry for simultaneous measurement of temperature and magnetic field
Author(s): Sohail H. Zaidi; Ralph P. Tatam
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Paper Abstract

A technique for simultaneous measurement of temperature and magnetic field is presented. Absolute temperature is recovered using a `white light' source combined with a tandem interferometer configuration. Magnetic field is recovered from the modulation of interferometer fringes when the sensor is illuminated with a single frequency source. The broad-band and narrow-band inputs are multiplexed into the sensor by modulating the injection current of a single laser diode source from just below threshold to near maximum operating current. In this technique the temperature is measured over exactly the same optical path as that subject to the magnetic field.

Paper Details

Date Published: 1 November 1994
PDF: 9 pages
Proc. SPIE 2292, Fiber Optic and Laser Sensors XII, (1 November 1994); doi: 10.1117/12.191863
Show Author Affiliations
Sohail H. Zaidi, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 2292:
Fiber Optic and Laser Sensors XII
Ramon P. DePaula, Editor(s)

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