Study of a high-temperature and high-pressure FBG sensor with Al₂O₃ thin-wall tube substrate

Abstract

A fiber Bragg grating (FBG) high-temperature and high pressure sensor has been designed and fabricated by using the Al₂O₃ thin-wall tube as a substrate. The test results show that the sensor can withstand a pressure range of 0–45 MPa and a temperature range of −10–300 °C, and has a pressure sensitivity of 0.0426 nm/MPa and a temperature sensitivity of 0.0112 nm /°C

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