TY - JOUR
T1 - Sagnac mirror loop with two polarization maintaining fibers for twist measurement by tracking adjacent dips with tunable measurement range
AU - Xue, Pingsheng
AU - Liu, Qiang
AU - Wu, Qiang
AU - Fu, Yongqing
N1 - Funding information: This research was funded by the National Natural Science Foundation of China (Grant No. 51907017), the Key Science and Technology Research Projects of Higher Education Institutions in Hebei Province of China (Grant No. ZD2019304), Hebei Natural Science Foundation (Grant No. F2020501040), the Fundamental Research Funds for the Central Universities of China (Grant No. N2123012).
PY - 2022/5/1
Y1 - 2022/5/1
N2 - The transmission characteristics of Sagnac fiber loop interferometer which consists two sections of polarization-maintaining fiber (PMF) spliced at different offset angles were analyzed. Based on the simulation results, an application for twist measurement where PMFs were spliced at different offset angles was designed. When the lengths of two PMFs are equal, a clear spectrum can be obtained for twist or torsion sensing. A phenomenon that the dips would split or merge with twist angle alteration can be used for sensing. Measurement range and sensitivity can be adjusted by changing the PMFs offset angle. The sensitivity was improved by calculating the distance between two adjacent dips, being 0.73 nm/° or 8.37 nm/(rad/m) when the offset angle was 75°.
AB - The transmission characteristics of Sagnac fiber loop interferometer which consists two sections of polarization-maintaining fiber (PMF) spliced at different offset angles were analyzed. Based on the simulation results, an application for twist measurement where PMFs were spliced at different offset angles was designed. When the lengths of two PMFs are equal, a clear spectrum can be obtained for twist or torsion sensing. A phenomenon that the dips would split or merge with twist angle alteration can be used for sensing. Measurement range and sensitivity can be adjusted by changing the PMFs offset angle. The sensitivity was improved by calculating the distance between two adjacent dips, being 0.73 nm/° or 8.37 nm/(rad/m) when the offset angle was 75°.
KW - fiber loop interferometer
KW - polarization maintaining fiber
KW - fiber sensor
UR - https://www.scopus.com/pages/publications/85123001932
U2 - 10.1016/j.optlastec.2022.107877
DO - 10.1016/j.optlastec.2022.107877
M3 - Article
SN - 0030-3992
VL - 149
SP - 1
EP - 6
JO - Optics and Laser Technology
JF - Optics and Laser Technology
M1 - 107877
ER -