A high-sensitivity current sensor utilizing CrNi wire and microfiber coils.
We obtain an extremely high current sensitivity by wrapping a section of microfiber on a thin-diameter chromium-nickel wire. Our detected current sensitivity is as high as 220.65 nm/A2 for a structure length of only 35 μm. Such sensitivity is two orders of magnitude higher than the counterparts reported in the literature. Analysis shows that a higher resistivity or/and a thinner diameter of the metal wire may produce higher sensitivity. The effects of varying the structure parameters on sensitivity are discussed. The presented structure has potential for low-current sensing or highly electrically-tunable filtering applications.
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. xxd7288100@gmail.com.
Xiaodong
X
Xie
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. tjieli@jnu.edu.cn.
Jie
J
Li
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. 741_okm@163.com.
Li-Peng
LP
Sun
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. xgsx1989@163.com.
Xiang
X
Shen
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. iptjinlong@gmail.com.
Long
L
Jin
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China. tguanbo@jnu.edu.cn.
Bai-ou
BO
Guan