High sensitivity fiber Bragg grating (FBG) sensor based on hollow core silica tube (HCST) sensitization for gas pressure and temperature discrimination
Document Type
Article
Publication Date
1-1-2023
Abstract
A fiber Bragg grating (FBG) based sensor is proposed for the measurement of gas pressure under extreme tem-perature condition. Two FBG sensors of different cladding diameters are encapsulated and sealed in a fine hollow-core silica tube (HCST) by using a high temperature resistant ceramic adhesive (HTA). In the observation, the FBG sensors are practically insensitive to pressure change at room temperature and their pressure sensitivities are negatively higher at higher temperature. This can be attributed to the temperature dependence of the HTA's Young's modulus. The findings show that the sensors have a maximum pressure and temperature sensitivity of-0.993 nm/MPa and 13.8 pm/degrees C for a pressure range of 0-1 MPa over the temperature range of 17-400 degrees C. Despite the high pressure-temperature cross sensitivities, an interesting approach based on a 2 x 2 character-istics matrix is demonstrated for discriminative measurement of pressure and temperature
Keywords
Fiber Bragg grating, High temperature, Gas pressure sensor
Divisions
Science
Funders
Science Technology Plan of ShaanXi [Grant No: 2020GY-187],Science Technology Plan of Yulin City [Grant No: CXY-2020-011-08],Fundamental Research Grant Scheme, Ministry of Education Malaysia [Grant No: FRGS/1/2022/STG07/UM/02/6]
Publication Title
Optical Fiber Technology
Volume
75
Publisher
Elsevier
Publisher Location
STE 800, 230 PARK AVE, NEW YORK, NY 10169 USA