Affiliation:
1. Jincheng Research Institute of Opto-Mechatronics Industry
Abstract
Whispering gallery mode (WGM)
resonators with an ultrahigh quality (
Q
) factor provide an extremely high
resolution for high-precision sensing. However, it is difficult to use
them directly in magnetic sensors because of the transparency to the
magnetic field. In this paper, a sandwich structure consisting of a
neodymium iron boron magnet and calcium fluoride resonator with a
Q
factor of
10
9
is proposed. The experimental results
show that, compared with the conventional magnetometer, the
signal-to-noise ratio of the optical WGM magnetometer reaches
62 dB, with the direct current sensitivity of
42.59 MHz/mT and the AC sensitivity of
794
p
T
H
z
−
1
/
2
at 42 kHz.
Funder
National Natural Science Foundation of
China
Key Laboratory of Shanxi
Province
Shanxi Key Laboratory of Advanced
Semiconductor Optoelectronic Devices and Integrated
Systems
Key RD Projects in Shanxi
Province
Jincheng Key RD Projects
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献