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Fiber‐optic whispering‐gallery‐mode magnetic field sensor based on magnetic fluid infiltrated hollow core fiber
Author(s) -
Zhang Junying,
Tian Chen,
Wang Ruohui,
Chen Haibin,
Zhang Xiongxing,
Guo Zilong,
Wang Wei
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32932
Subject(s) - whispering gallery wave , materials science , magnetic field , optical fiber , core (optical fiber) , fiber , optics , resonator , fiber optic sensor , optoelectronics , composite material , physics , quantum mechanics
A fiber‐optic magnetic field sensor based on magnetic fluid (MF) infiltrated hollow core fiber (HCF) was proposed. The MF infiltrated HCF was used as a micro‐capillary ring resonator, in which, whispering‐gallery modes (WGMs) were exited through a closely placed tapered fiber. Through the intensity modulation introduced by external magnetic field on the resonance dip of the WGM excited in the MF infiltrated HCF, magnetic field measurement can be realized through a cost‐effective way. Experimental results demonstrated a magnetic field linear measurement range of 40–140 Oe, and a sensitivity of 0.04 dB/Oe.