TY - GEN
T1 - High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure
AU - Zhu, T.
AU - Rao, Y. J.
AU - Song, Y.
AU - Chiang, K. S.
PY - 2008
Y1 - 2008
N2 - We present a highly sensitive strain sensor based on the use of a long-period fiber grating with rotary grooves carved by high-frequency CO 2-laser pulses. We observe that, when the rotation rate of the grooves is sufficiently large, the resonance peak of the grating split into two with a wavelength separation that changes sensitively with the strain applied along the grating and remains practically constant with a change in the ambient temperature. By measuring the wavelength separation of the two resonance peaks, we obtain a strain sensitivity of ∼0.1 nm/με without any temperature compensation, which is larger than that of a conventional long-period fiber grating by almost two orders of magnitude.
AB - We present a highly sensitive strain sensor based on the use of a long-period fiber grating with rotary grooves carved by high-frequency CO 2-laser pulses. We observe that, when the rotation rate of the grooves is sufficiently large, the resonance peak of the grating split into two with a wavelength separation that changes sensitively with the strain applied along the grating and remains practically constant with a change in the ambient temperature. By measuring the wavelength separation of the two resonance peaks, we obtain a strain sensitivity of ∼0.1 nm/με without any temperature compensation, which is larger than that of a conventional long-period fiber grating by almost two orders of magnitude.
KW - Long-period fiber grating
KW - Optical fiber sensors
KW - Strain gauge
KW - Temperature compensation
UR - https://www.scopus.com/pages/publications/45549108188
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-45549108188&origin=recordpage
U2 - 10.1117/12.785788
DO - 10.1117/12.785788
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9780819472045
VL - 7004
BT - Proceedings of SPIE - The International Society for Optical Engineering
T2 - 19th International Conference on Optical Fibre Sensors
Y2 - 15 April 2008 through 18 April 2008
ER -