Fiber Fabry–Pérot Interferometer for Measurement of Gas Pressure and Temperature

A fiber Fabry-Pérot interferometer (FPI) is proposed and demonstrated for the measurement of gas pressure and temperature. The interferometer is fabricated by fusion splicing a short segment of capillary tube to a standard single mode fiber (SMF), followed by inserting a glass microsphere into the tube, the air gap between the SMF end face and the glass microsphere then forms a fiber FPI. Due to the additional reflection occurred on the rear surfaces of the microsphere, the reflection spectrum of the device is a three-beam interference pattern. Owing to the dependence of refractive index of gas on the pressure applied and the thermal-optical effect of glass microsphere, different dips in the interference fringe pattern exhibit different responses to the changes in gas pressure and temperature, which enables a simultaneous gas pressure and temperature sensing. The proposed device has the advantages of compact size, robust structure, easy fabrication, high gas pressure sensitivity, and supporting of range tunable operation.

[1]  C. Liao,et al.  Sub-micron silica diaphragm-based fiber-tip Fabry-Perot interferometer for pressure measurement. , 2014, Optics letters.

[2]  Rongqing Hui,et al.  Fiber-optic acoustic pressure sensor based on large-area nanolayer silver diaghragm. , 2014, Optics letters.

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

[4]  Kevin P. Chen,et al.  Design of a highly-birefringent microstructured photonic crystal fiber for pressure monitoring. , 2010, Optics express.

[5]  Jun Ma,et al.  High-sensitivity fiber-tip pressure sensor with graphene diaphragm. , 2012, Optics letters.

[6]  Edvin Deadman,et al.  Estimating the condition number of f(A)b , 2015, Numerical Algorithms.

[7]  W. Peng,et al.  Fiber-Optic Pressure Sensor Based on $\pi$-Phase-Shifted Fiber Bragg Grating on Side-Hole Fiber , 2012, IEEE Photonics Technology Letters.

[8]  Feng Xu,et al.  High-sensitivity Fabry-Perot interferometric pressure sensor based on a nanothick silver diaphragm. , 2012, Optics letters.

[9]  J Ma,et al.  Optical-fiber sensor for simultaneous measurement of pressure and temperature: analysis of cross sensitivity. , 1996, Applied optics.

[10]  H. Bae,et al.  Miniature Fabry-Perot pressure sensor created by using UV-molding process with an optical fiber based mold. , 2012, Optics express.

[11]  H. Tam,et al.  High-pressure and high-temperature characteristics of a Fabry-Perot interferometer based on photonic crystal fiber. , 2011, Optics letters.

[12]  H. Tam,et al.  Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer. , 2008, Applied optics.

[13]  John D. Wright,et al.  Sensing applications of a low-coherence fibre-optic interferometer measuring the refractive index of air , 2001 .

[14]  Edson R. Peck,et al.  Dispersion of Air , 1972 .

[15]  Xiaopeng Dong,et al.  Highly-sensitive gas pressure sensor using twin-core fiber based in-line Mach-Zehnder interferometer. , 2015, Optics express.

[16]  K. Cooper,et al.  All-fused-silica miniature optical fiber tip pressure sensor. , 2006, Optics letters.

[17]  R Chitaree,et al.  Fiber in-line Mach-Zehnder interferometer based on an inner air-cavity for high-pressure sensing. , 2015, Optics letters.

[18]  K. P. Birch,et al.  LETTER TO THE EDITOR: Correction to the Updated Edln Equation for the Refractive Index of Air , 1994 .

[19]  Hwa-Yaw Tam,et al.  Intermodal coupling of supermodes in a twin-core photonic crystal fiber and its application as a pressure sensor. , 2012, Optics express.

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

[21]  Amardeep Kaur,et al.  High-temperature fiber-optic Fabry-Perot interferometric pressure sensor fabricated by femtosecond laser. , 2013, Optics letters.

[22]  Enhancing the pressure sensitivity of a Fabry–Perot interferometer using a simplified hollow-core photonic crystal fiber with a microchannel , 2015 .

[23]  Elfed Lewis,et al.  Femtosecond-Laser-Based Inscription Technique for Post-Fiber-Bragg Grating Inscription in an Extrinsic Fabry–Perot Interferometer Pressure Sensor , 2016, IEEE Sensors Journal.

[24]  Elfed Lewis,et al.  Fiber-optic combined FPI/FBG sensors for monitoring of radiofrequency thermal ablation of liver tumors: ex vivo experiments. , 2014, Applied optics.

[25]  Yunjiang Rao,et al.  High sensitivity gas refractometer based on all-fiber open-cavity Fabry–Perot interferometer formed by large lateral offset splicing , 2012 .

[26]  K. P. Birch,et al.  An Updated Edln Equation for the Refractive Index of Air , 1993 .

[27]  E. Cibula,et al.  All-fiber high-sensitivity pressure sensor with SiO2 diaphragm. , 2005, Optics letters.

[28]  Anbo Wang,et al.  Miniature fiber-optic pressure sensor , 2005 .

[29]  Daru Chen,et al.  Side-Hole Dual-Core Photonic Crystal Fiber for Hydrostatic Pressure Sensing , 2012, Journal of Lightwave Technology.

[30]  Jian Ju,et al.  A Compact Fiber-Tip Micro-Cavity Sensor for High-Pressure Measurement , 2011, IEEE Photonics Technology Letters.