High mechanical-Q Lorentz force sensor for DC magnetic field measurement

G. A. Cranch; C. G. Askins; R. E. Bartolo; G. A. Miller; C. K. Kirkendall

doi:10.1117/12.834492

5 October 2009 High mechanical-Q Lorentz force sensor for DC magnetic field measurement

G. A. Cranch, C. G. Askins, R. E. Bartolo, G. A. Miller, C. K. Kirkendall

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750330 (2009) https://doi.org/10.1117/12.834492
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

G. A. Cranch, C. G. Askins, R. E. Bartolo, G. A. Miller, and C. K. Kirkendall "High mechanical-Q Lorentz force sensor for DC magnetic field measurement", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750330 (5 October 2009); https://doi.org/10.1117/12.834492

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