Simultaneous Measurements of Temperature and Pressure With a Dual-Cavity Fabry–Perot Sensor

A fiber-optic dual-cavity Fabry–Perot interferometric sensor for the simultaneous measurement of temperature and pressure is proposed and experimentally demonstrated. The sensor cascades a fiber-optic intrinsic Fabry–Perot interferometer (IFPI) and an extrinsic Fabry–Perot interferometer (EFPI). The IFPI is used as the temperature sensor and the EFPI is used as the pressure sensor. The pressure sensor is based on a diaphragm-free structure and can work stably at high temperature. Two optical path differences are interrogated simultaneously by using the fast Fourier transform-based white-light interferometry and the peak-to-peak method. Experimental results show that the proposed sensor exhibits a temperature sensitivity of 29.63 nm/°C within the temperature range of 40 °C–1100 °C and a pressure sensitivity of 1465.8 nm/MPa within the pressure range of 0–10 MPa at the room temperature.

[1]  Denis Donlagic,et al.  High resolution, all-fiber, micro-machined sensor for simultaneous measurement of refractive index and temperature. , 2014, Optics express.

[2]  Denis Donlagic,et al.  Miniature all-fiber Fabry-Perot sensor for simultaneous measurement of pressure and temperature. , 2012, Applied optics.

[3]  S. Pevec,et al.  Miniature fiber-optic sensor for simultaneous measurement of pressure and refractive index. , 2014, Optics letters.

[4]  E. Cibula,et al.  Low-loss semi-reflective in-fiber mirrors. , 2010, Optics express.

[5]  Denis Donlagic.  All-fiber micromachined microcell. , 2011, Optics letters.

[6]  Dagong Jia,et al.  Optical Fiber Fabry–Pérot Interferometer Based on an Air Cavity for Gas Pressure Sensing , 2017, IEEE Photonics Journal.

[7]  Jie Huang,et al.  Simultaneous measurement of temperature and pressure with cascaded extrinsic Fabry–Perot interferometer and intrinsic Fabry–Perot interferometer sensors , 2014 .

[8]  Orlando Frazão,et al.  An all-fiber Fabry-Pérot interferometer for pressure sensing in different gaseous environments , 2014 .

[9]  S. Pevec,et al.  Miniature fiber-optic Fabry-Perot refractive index sensor for gas sensing with a resolution of 5x10-9 RIU. , 2018, Optics express.

[10]  Shuisheng Jian,et al.  Simultaneous measurement of pressure and temperature based on processed capillary tube and fiber Bragg grating , 2016 .

[11]  Minghong Yang,et al.  A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures , 2018, Sensors.

[12]  Ben Xu,et al.  Fiber-tip gas pressure sensor based on dual capillaries. , 2015, Optics express.

[13]  Sumei Wang,et al.  Pressure and Temperature Sensor Based on Graphene Diaphragm and Fiber Bragg Gratings , 2018, IEEE Photonics Technology Letters.

[14]  S. Lyuksyutov,et al.  Peculiarities of thermo-optic coefficient under different temperature regimes in optical fibers containing fiber Bragg gratings , 2012 .

[15]  E. Lewis,et al.  Feedback Stabilized Interrogation Technique for EFPI/FBG Hybrid Fiber-Optic Pressure and Temperature Sensors , 2012, IEEE Sensors Journal.

[16]  Ying Wang,et al.  Diaphragm-free gas-pressure sensor probe based on hollow-core photonic bandgap fiber. , 2018, Optics letters.

[17]  Yi Jiang,et al.  High-resolution interrogation technique for fiber optic extrinsic Fabry-Perot interferometric sensors by the peak-to-peak method. , 2008, Applied optics.

[18]  Yi Jiang,et al.  Fourier Transform White-Light Interferometry for the Measurement of Fiber-Optic Extrinsic Fabry–PÉrot Interferometric Sensors , 2008, IEEE Photonics Technology Letters.