Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6888304 | Optical Fiber Technology | 2018 | 4 Pages |
Abstract
In this paper, a new cascade structure is presented to measure temperature and strain simultaneously. It is made of a CO2-laser-notched long-period fiber grating (CO2-LFPG) and a modular LFPG. Experiments prove that the temperature sensitivity of the modular LPFG is about 5â¯times lower than that of the CO2-LFPG. Before and after connecting the modular LPFG and the CO2-LPFG together, the experimental results indicate that the temperature and the strain sensitivities of them almost have no change and are retained. The temperature and the strain sensitivities of modular LPFG (resonance wavelength at 1258â¯nm) are â15.4â¯pm/°C and â1.2â¯pm/με, respectively. And the temperature and the strain sensitivities of CO2-LPFG (resonance wavelength at 1356â¯nm) are 58.3â¯pm/°C and â0.5â¯pm/με, respectively. Through the experiments, the feasibility of using the proposed sensor to measure strain and temperature simultaneously has been verified. Therefore, it is strongly believed that the proposed sensor can be used to achieve simultaneous measurement of strain and temperature.
Related Topics
Physical Sciences and Engineering
Computer Science
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Authors
Qi Yan, Weiliang Liu, Shujie Duan, Cuiting Sun, Shuo Zhang, Zhihang Han, Xiren Jin, Lei Zhao, Tao Geng, Weimin Sun, Libo Yuan,