TY - JOUR
T1 - Low-Cost Magneto-Optic Sensor Based on Tapered Fiber and Distributed Sensing Concept
AU - Akhoundi, Farhad
AU - Norwood, Robert A.
AU - Peyghambarian, N.
N1 - Funding Information: Manuscript received March 13, 2019; revised April 18, 2019; accepted April 19, 2019. Date of publication April 22, 2019; date of current version May 15, 2019. This work was supported by the State of Arizona’s Technology and Research Initiative Fund (TRIF). (Corresponding author: Farhad Akhoundi.) The authors are with the College of Optical Sciences, The University of Arizona, Tucson, AZ 85721 USA (e-mail: [email protected]; [email protected]; [email protected]). Publisher Copyright: © 1989-2012 IEEE.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - In this letter, we present a magnetic field sensor with a noise equivalent field of 500 nT based on a tapered fiber in a magnetic fluid (Fe3O4 nanoparticles dispersed in the deionized water). This sensitivity, which is three orders of magnitude better than the previously demonstrated tapered sensors, is achieved by biasing the fluid material with a ≈1-mT magnetic field. In addition, application of an optical modulator and an auto-balanced synchronized detector increased the sensor output signal-to-noise ratio significantly. Furthermore, a novel method is presented to employ the proposed sensor in a distributed scheme.
AB - In this letter, we present a magnetic field sensor with a noise equivalent field of 500 nT based on a tapered fiber in a magnetic fluid (Fe3O4 nanoparticles dispersed in the deionized water). This sensitivity, which is three orders of magnitude better than the previously demonstrated tapered sensors, is achieved by biasing the fluid material with a ≈1-mT magnetic field. In addition, application of an optical modulator and an auto-balanced synchronized detector increased the sensor output signal-to-noise ratio significantly. Furthermore, a novel method is presented to employ the proposed sensor in a distributed scheme.
KW - Faraday effect
KW - Optical sensing and sensors
KW - fiber optics components
KW - magneto-optic systems
KW - tapered fiber
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U2 - 10.1109/LPT.2019.2912744
DO - 10.1109/LPT.2019.2912744
M3 - Article
SN - 1041-1135
VL - 31
SP - 901
EP - 904
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 11
M1 - 8695121
ER -