16 May 2008 High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure
Author Affiliations +
Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70040C (2008) https://doi.org/10.1117/12.785788
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia
Abstract
We present a highly sensitive strain sensor based on the use of a long-period fiber grating with rotary grooves carved by high-frequency CO2-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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Zhu, Y. J. Rao, Y. Song, K. S. Chiang, "High-sensitivity temperature-independent strain sensor based on a long-period fiber grating with a CO2-laser engraved rotary structure", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70040C (16 May 2008); doi: 10.1117/12.785788; https://doi.org/10.1117/12.785788
PROCEEDINGS
4 PAGES


SHARE
Back to Top