TY - JOUR
T1 - A high sensitivity temperature sensor based on balloon-shaped bent SMF structure with its original polymer coating
AU - Tian, Ke
AU - Farrell, Gerald
AU - Lewis, Elfed
AU - Wang, Xianfan
AU - Liang, Haidong
AU - Wang, Pengfei
N1 - Publisher Copyright:
© 2018 IOP Publishing Ltd.
PY - 2018/6/28
Y1 - 2018/6/28
N2 - A high sensitivity optical fibre temperature sensor is demonstrated based on a balloon-shaped bent single-mode (BSBS) fibre structure where the fibre retains its original protective polymer coating. The BSBS fibre structure can be simply realized by bending a coated straight single-mode fibre into the balloon shape using a section of silica capillary tube. By adjusting the bending radius of the balloon-shaped fibre section, a modal interferometer between the core mode and the coating mode can be effectively implemented at a suitable bending radius. Considering the intrinsically high thermo-optical coefficient and thermal expansion coefficient of the polymer coating, the BSBS fibre structure offers excellent temperature sensing performance. Experimental results show that the temperature sensitivity is as high as -2465 pm C-1 with a resolution of 0.008 C over the temperature range of 20.7 C-31.7 C. Based on its simple fabrication process, very low cost, and experimentally determined high sensitivity coupled with good repeatability, the temperature sensor described in this article could be a competitive candidate in many temperature sensing applications.
AB - A high sensitivity optical fibre temperature sensor is demonstrated based on a balloon-shaped bent single-mode (BSBS) fibre structure where the fibre retains its original protective polymer coating. The BSBS fibre structure can be simply realized by bending a coated straight single-mode fibre into the balloon shape using a section of silica capillary tube. By adjusting the bending radius of the balloon-shaped fibre section, a modal interferometer between the core mode and the coating mode can be effectively implemented at a suitable bending radius. Considering the intrinsically high thermo-optical coefficient and thermal expansion coefficient of the polymer coating, the BSBS fibre structure offers excellent temperature sensing performance. Experimental results show that the temperature sensitivity is as high as -2465 pm C-1 with a resolution of 0.008 C over the temperature range of 20.7 C-31.7 C. Based on its simple fabrication process, very low cost, and experimentally determined high sensitivity coupled with good repeatability, the temperature sensor described in this article could be a competitive candidate in many temperature sensing applications.
KW - fibre bend
KW - modal interferometer
KW - polymer coating
KW - temperature measurement
UR - http://www.scopus.com/inward/record.url?scp=85050394801&partnerID=8YFLogxK
U2 - 10.1088/1361-6501/aac992
DO - 10.1088/1361-6501/aac992
M3 - Article
AN - SCOPUS:85050394801
SN - 0957-0233
VL - 29
JO - Measurement Science and Technology
JF - Measurement Science and Technology
IS - 8
M1 - 085104
ER -