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 This work has been supported by the National “863” Project of China (No.2002AA313150).