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Proceedings Paper

High mechanical-Q Lorentz force sensor for DC magnetic field measurement
Author(s): G. A. Cranch; C. G. Askins; R. E. Bartolo; G. A. Miller; C. K. Kirkendall
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Paper Abstract

This manuscript presents a fully engineered fiber-optic magnetic field sensor based on the Lorentz force. The sensor comprises a gold coated optical fiber that is soldered to a current carrying aluminum ribbon. The ribbon vibrates in the presence of a magnetic field which is detected with fiber optic interferometry. The mechanical-Q of the mechanism is measured to be 200±10% which is greater than previous prototype designs by a factor between 2.7 and 11.3. This yields a higher resonant responsivity and lower thermo-mechanical noise.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750330 (5 October 2009); doi: 10.1117/12.834492
Show Author Affiliations
G. A. Cranch, Naval Research Lab. (United States)
C. G. Askins, Naval Research Lab. (United States)
R. E. Bartolo, Naval Research Lab. (United States)
G. A. Miller, Naval Research Lab. (United States)
C. K. Kirkendall, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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