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Proceedings Paper

Recent developments in fiber optic magnetostrictive sensors
Author(s): Frank Bucholtz; Dominique M. Dagenais; Kee Pun Koo; Sandeep T. Vohra
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Paper Abstract

We review developments over the past five years in fiber optic magnetometry based on magnetostriction. Recent work has demonstrated detection of magnetic fields from dc to over 1 MHz with resolution of 10 pT P1Hz at 1 .0 Hz and 0.07 pTpIHz at35 kHz in laboratory devices. We present the basic device operating principles and discuss factors which limit the resolution of fiber optic interferometric magnetic sensors. Results are presented for a number of configurations including a ruggedized, compact, three-axis magnetometer for dc and low-frequency measurements, a single-axis gradiometer, a single-axis heterodyne configuration for narrowband detection of fields in the frequency range 0.01 Hz to 1 MHz, and a magnetostrictive oscillator which exhibits period doubling bifurcations and chaos.

Paper Details

Date Published: 1 February 1991
PDF: 10 pages
Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); doi: 10.1117/12.24751
Show Author Affiliations
Frank Bucholtz, Naval Research Lab. (United States)
Dominique M. Dagenais, Naval Research Lab. (United States)
Kee Pun Koo, Naval Research Lab. (United States)
Sandeep T. Vohra, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 1367:
Fiber Optic and Laser Sensors VIII
Ramon P. DePaula; Eric Udd, Editor(s)

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