TY - JOUR
T1 - Volume strain sensor based on spectra analysis of in-fiber modal interferometer
AU - Xu, Zhilin
AU - Sun, Qizhen
AU - Wo, Jianghai
AU - Dai, Yi
AU - Li, Xiaolei
AU - Liu, Deming
PY - 2013/6
Y1 - 2013/6
N2 - An optical in-fiber modal interferometer-based volume strain sensor for earthquake prediction is proposed and experimentally demonstrated. The sensing element is formed by wrapping a multimode-singlemode-multimode fiber structure onto a polyurethane hollow column. Due to the modal interference between the excited guided modes in the fiber, strong interference pattern could be observed in the transmission spectrum. Theoretical analysis verifies that the resonant wavelength shifts as a result of the volume strain variation caused by the column deformation with square root relationship. Sensitivity > 3.93 pm/με within the volume strain ranging from 0 to 1300 με is also experimentally demonstrated. By taking the response of bidirectional change of volume strain and the sluggish character of the employed sensing material into consideration, the sensing system presents good repeatability and stability.
AB - An optical in-fiber modal interferometer-based volume strain sensor for earthquake prediction is proposed and experimentally demonstrated. The sensing element is formed by wrapping a multimode-singlemode-multimode fiber structure onto a polyurethane hollow column. Due to the modal interference between the excited guided modes in the fiber, strong interference pattern could be observed in the transmission spectrum. Theoretical analysis verifies that the resonant wavelength shifts as a result of the volume strain variation caused by the column deformation with square root relationship. Sensitivity > 3.93 pm/με within the volume strain ranging from 0 to 1300 με is also experimentally demonstrated. By taking the response of bidirectional change of volume strain and the sluggish character of the employed sensing material into consideration, the sensing system presents good repeatability and stability.
KW - Modal interferometer
KW - multimode-singlemode-multimode fiber structure
KW - optical fiber sensor
KW - volume strain sensing
UR - http://www.scopus.com/inward/record.url?scp=84876804816&partnerID=8YFLogxK
UR - http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?arnumber=6472728
U2 - 10.1109/JSEN.2013.2250952
DO - 10.1109/JSEN.2013.2250952
M3 - Article
AN - SCOPUS:84876804816
SN - 1530-437X
VL - 13
SP - 2139
EP - 2145
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 6
ER -