期刊
RESULTS IN PHYSICS
卷 29, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2021.104743
关键词
Fiber optics; Magnetic field sensor; Birefringence-induced dispersion turning point; Microfiber coupler; Magnetic fluid; Vernier effect
资金
- National Natural Science Foundation of China [62075130, 61675132]
- Shanghai Shuguang Program [16SG40]
- Shanghai Talent Development Fund [201529]
An ultra-sensitive magnetic field sensor based on microfiber coupler and magnetic fluid is proposed, with significantly enhanced sensitivity near the birefringence-induced dispersion turning point. The sensor has high potential for applications in high-precision magnetic field measurement due to its extremely high sensitivity and low temperature sensitivity.
A kind of ultrasensitive magnetic field sensor based on microfiber coupler and magnetic fluid (MF) is proposed and investigated. As the working wavelength is near the birefringence-induced dispersion turning point (B-DTP), the sensitivity has been enhanced considerably and the maximum sensitivity can achieve -97.856 nm/mT. By tracking the B-DTP, the problem of high sensitivity but narrow detection range can be solved. The temperature sensitivity of the structure is 0.816 nm/celcius. The proposed sensor has the advantages of extremely high sensitivity, which has the potential applications in high-precision magnetic field measurement.
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