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9 October 2021 A sensitivity-enhanced all-fiber Fabry-Perot high-pressure sensor with a hard-core diaphragm
Xiu He, Zengling Ran, Nan Wang, Zhaoyang Ding, Lupeng Gan, Mengke Yu, Zhengxi He, Dong Sun, Yunjiang Rao, Yachao Zhang, Dongsheng Ye
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Proceedings Volume 11901, Advanced Sensor Systems and Applications XI; 1190108 (2021) https://doi.org/10.1117/12.2599493
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China
Abstract
A novel sensitivity-enhanced all-fiber Fabry-Perot high-pressure sensor consisting of a long gauge-length and a hard-core diaphragm is proposed and demonstrated. The hard-core diaphragm can effectively improve the pressure sensitivity of the sensor and eliminate the additional reflection of its outer surface. Theoretical and experimental results show that the pressure sensitivity of the sensor is increased to about 2 times when its diaphragm thickness is decreased from 5 mm to 11 μm. In addition, the pressure and temperature sensitivity of –342.6 pm/MPa and –2.8 pm/℃ are achieved, respectively, in the pressure range of 0~20 MPa and temperature range of 13.6~300 ℃. The proposed sensor could offer some excellent features such as good high-temperature stability, low-temperature pressure cross-sensitivity, low mechanical hysteresis, making it attractive for pressure measurement under harsh environments.
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Xiu He, Zengling Ran, Nan Wang, Zhaoyang Ding, Lupeng Gan, Mengke Yu, Zhengxi He, Dong Sun, Yunjiang Rao, Yachao Zhang, and Dongsheng Ye "A sensitivity-enhanced all-fiber Fabry-Perot high-pressure sensor with a hard-core diaphragm", Proc. SPIE 11901, Advanced Sensor Systems and Applications XI, 1190108 (9 October 2021); https://doi.org/10.1117/12.2599493
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KEYWORDS
Sensors
Fiber optics sensors
Fabry–Perot interferometers
Fiber optics
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