TY - JOUR
T1 - Fiber Ring Laser Based on Side-Polished Fiber MZI for Enhancing Refractive Index and Torsion Measurement
AU - Bo, Wan
AU - Liu, Bin
AU - Liu, Juan
AU - He, Xing Dao
AU - Yuan, Jinhui
AU - Wu, Qiang
N1 - Funding information:
10.13039/501100001809-National Natural Science Foundation of China (NSFC) (Grant Number: 11864025, 62175097 and 62065013)
10.13039/501100004479-Natural Science Foundation of Jiangxi Province (Grant Number: 20212BAB202024)
Key Research and Development Projects of the Ministry of Science and Technology of China (Grant Number: 2018YFE0115700)
PY - 2022/4/15
Y1 - 2022/4/15
N2 - A fiber ring laser based on a side-polish fiber Mach-Zehnder interferometer (MZI) for effective improving refractive index (RI) and torsion sensing is proposed and investigated. The side-polished fiber MZI sensor can not only enhance the evanescent wave but also break circular symmetry of optical fiber face section, so it can be used for the surrounding RI and torsion sensing. A spectrum 3 dB bandwidth of less than 0.15 nm has been achieved which makes the fiber ring laser torsion sensing system to have higher measurement resolution. Experiment results show that the RI and torsion sensitivity of proposed sensor is dependent on the polish depth: the thicker the polish depth, the higher the sensitivity. For a sensor with side polish depth of 47 μ m, the measured RI sensitivity reaches-81.36 nm/RIU, the torsion sensitivity is as high as-0.019nm/O, the sensitivity converted to torsional rate is-0.267 nm/(rad. m-1).
AB - A fiber ring laser based on a side-polish fiber Mach-Zehnder interferometer (MZI) for effective improving refractive index (RI) and torsion sensing is proposed and investigated. The side-polished fiber MZI sensor can not only enhance the evanescent wave but also break circular symmetry of optical fiber face section, so it can be used for the surrounding RI and torsion sensing. A spectrum 3 dB bandwidth of less than 0.15 nm has been achieved which makes the fiber ring laser torsion sensing system to have higher measurement resolution. Experiment results show that the RI and torsion sensitivity of proposed sensor is dependent on the polish depth: the thicker the polish depth, the higher the sensitivity. For a sensor with side polish depth of 47 μ m, the measured RI sensitivity reaches-81.36 nm/RIU, the torsion sensitivity is as high as-0.019nm/O, the sensitivity converted to torsional rate is-0.267 nm/(rad. m-1).
KW - Erbium-doped fiber ring laser
KW - Mach-Zehnder interference
KW - refractive index (RI) sensing
KW - side-polished fiber
KW - torsion sensing
UR - https://www.scopus.com/pages/publications/85128938766
U2 - 10.1109/JSEN.2022.3154761
DO - 10.1109/JSEN.2022.3154761
M3 - Article
AN - SCOPUS:85128938766
SN - 1530-437X
VL - 22
SP - 7779
EP - 7784
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 8
ER -