Magneto-optic Kerr effect sensors for fiber optic applications

Steven A. Oliver; Charles A. DiMarzio; Aniruddha B. Kale; Scott C. Lindberg; Stephen W. McKnight

doi:10.1117/12.169948

9 March 1994 Magneto-optic Kerr effect sensors for fiber optic applications

Steven A. Oliver, Charles A. DiMarzio, Aniruddha B. Kale, Scott C. Lindberg, Stephen W. McKnight

Proceedings Volume 2070, Fiber Optic and Laser Sensors XI; (1994) https://doi.org/10.1117/12.169948
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A novel sensor technique using a magnetic thin film as the sensing element and the magneto- optic Kerr effect as the optical read technique has been tested experimentally through magnetic field measurements. Sensitivity results obtained using a simple free space ellipsometry measurement system show a magnetic field sensitivity near 10^-3 Oe at low frequencies. Calculations indicate that sensitivities of order 10^-6 Oe are possible with improvements in the optical system and the magnetic film sensing element. This technique appears to be implementable in a small fiber optic-compatible device, with foreseen advantages including a very high bandwidth, good thermal stability, and the use of a single optical path.

Citation Download Citation

Steven A. Oliver, Charles A. DiMarzio, Aniruddha B. Kale, Scott C. Lindberg, and Stephen W. McKnight "Magneto-optic Kerr effect sensors for fiber optic applications", Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); https://doi.org/10.1117/12.169948

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