Combined narrow-band and broad-band interferometry for simultaneous measurement of temperature and magnetic field

Sohail H. Zaidi; Ralph P. Tatam

doi:10.1117/12.191863

1 November 1994 Combined narrow-band and broadband interferometry for simultaneous measurement of temperature and magnetic field

Sohail H. Zaidi, Ralph P. Tatam

Author Affiliations +

Proceedings Volume 2292, Fiber Optic and Laser Sensors XII; (1994) https://doi.org/10.1117/12.191863
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

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Sohail H. Zaidi and Ralph P. Tatam "Combined narrow-band and broadband interferometry for simultaneous measurement of temperature and magnetic field", Proc. SPIE 2292, Fiber Optic and Laser Sensors XII, (1 November 1994); https://doi.org/10.1117/12.191863

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