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Proceedings Paper

Common Mode Rejection Considerations For Mach-Zehnder Fiber Optic Magnetic Gradiometer
Author(s): R. D. Rempt
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Paper Abstract

A Mach-Zehnder interferometer configured as a magnetic gradiometer common mode rejects the field. The nonlinear effect coupling the transducer in each arm of the interferometer results in a sensor output that contains signals proportional to both the field and the gradient if the sensor is slightly out of balance. This field signal can swamp the gradient unless care is taken to eliminate it. Analytically modelled data are presented showing this effect, and it's estimate of the "purity" of the gradient signal. To operate the gradiometer unambiguously, the field must be rejected by >60 dB.

Paper Details

Date Published: 13 February 1990
PDF: 7 pages
Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); doi: 10.1117/12.963035
Show Author Affiliations
R. D. Rempt, Boeing Aerospace & Electronics (United States)

Published in SPIE Proceedings Vol. 1169:
Fiber Optic and Laser Sensors VII
Ramon P. DePaula; Eric Udd, Editor(s)

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