TY - GEN
T1 - Temperature-independent fiber Bragg grating micro-displacement sensor
AU - Guo, Tuan
AU - Zhao, Qida
AU - Xue, Lifang
AU - Huang, Guiling
AU - Gao, Shiyu
AU - Yan, Yu
AU - Zhao, Luming
AU - Liu, Lihui
PY - 2006
Y1 - 2006
N2 - Temperature-independent micro-displacement measurement using a single fiber Bragg grating based on broadened reflection spectrum is proposed and experimentally demonstrated. The structure of specially designed bending cantilever beam (BCB) is proposed. The BCB induces axial strain gradient along the sensing FBG, resulting in a Bragg bandwidth modulation. The broadening of FBG spectrum bandwidth and the reflected optical power correspond to micro-displacement changes, insensitive to spatially uniform temperature variations. For a displacement variation of 20mm and a temperature change from 20°C to 100°C, the micro-displacement measurement deviation error is ±0.12mm without any temperature compensation. Through optical power detecting by a pin photodiode (PD), the micro-displacement sensor avoids complex demodulation process and potentially costs little.
AB - Temperature-independent micro-displacement measurement using a single fiber Bragg grating based on broadened reflection spectrum is proposed and experimentally demonstrated. The structure of specially designed bending cantilever beam (BCB) is proposed. The BCB induces axial strain gradient along the sensing FBG, resulting in a Bragg bandwidth modulation. The broadening of FBG spectrum bandwidth and the reflected optical power correspond to micro-displacement changes, insensitive to spatially uniform temperature variations. For a displacement variation of 20mm and a temperature change from 20°C to 100°C, the micro-displacement measurement deviation error is ±0.12mm without any temperature compensation. Through optical power detecting by a pin photodiode (PD), the micro-displacement sensor avoids complex demodulation process and potentially costs little.
KW - Bending cantilever beam
KW - Fiber bragg gratings
KW - Micro-displacement sensor
KW - Temperature-independent
UR - https://www.scopus.com/pages/publications/33748677963
U2 - 10.1117/12.694436
DO - 10.1117/12.694436
M3 - Conference contribution
AN - SCOPUS:33748677963
SN - 0819464201
SN - 9780819464200
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Advanced Laser Technologies 2005
T2 - Advanced Laser Technologies 2005
Y2 - 3 September 2005 through 6 September 2005
ER -