Title :
Highly Sensitive Current Sensor Based on an Optical Microfiber Loop Resonator Incorporating Low Index Polymer Overlay
Author :
Min-Seok Yoon ; Soo Kyung Kim ; Young-Geun Han
Author_Institution :
Dept. of Phys., Hanyang Univ., Seoul, South Korea
Abstract :
A highly sensitive current sensor based on an optical microfiber loop resonator (MLR) incorporating low index polymer is proposed and experimentally demonstrated. The microfiber with a waist diameter of 2 μm is wrapped around the nichrome wire with low index polymer overlay to realize the MLR as the highly sensitive current sensor. Low index polymer overlay can successfully reduce round-trip fractional loss resulting in the improvement of the Q-factor (Q) and the finesse (F) of the MLR around the nichrome wire. The use of the microfiber with a waist diameter of 2 μm and low index polymer with high thermal property can effectively improve the current sensitivity of the proposed MLR to be 437.9 pm/A2.
Keywords :
Q-factor; electric current; electric sensing devices; fibre optic sensors; micro-optics; microcavities; microsensors; optical fibre losses; optical fibre testing; optical polymers; optical resonators; refractive index; Q-factor; highly sensitive current sensor; low index polymer overlay; nichrome wire; optical microfiber loop resonator; round-trip fractional loss reduction; size 2 mum; thermal property; Current; Indexes; Optical fiber sensors; Optical resonators; Polymers; Wires; Electric current sensors; Fiber-optic sensors; electric current sensors.; fiber-optic sensors; microfiber; microfiber loop resonator;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2371030
