Ultrasensitive strain sensor based on Vernier- effect improved parallel structured fiber-optic Fabry-Perot interferometer.

A novel parallel structured fiber-optic Fabry-Perot interferometer (FPI) based on Vernier-effect is theoretically proposed and experimentally demonstrated for ultrasensitive strain measurement. This proposed sensor consists of open-cavity and closed-cavity fiber-optic FPI, both of which are connected in parallel via a 3 dB coupler. The open-cavity is implemented for sensing, while the closed-cavity for reference. Experimental results show that the proposed parallel structured fiber-optic FPI can provide an ultra-high strain sensitivity of -43.2 pm/με, which is 4.6 times higher than that of a single open-cavity FPI. Furthermore, the sensor is simple in fabrication, robust in structure, and stable in measurement. Finally, the parallel structured fiber-optic FPI scheme proposed in this paper can also be applied to other sensing field, and provide a new perspective idea for high sensitivity sensing.

[1]  Tao Zhu,et al.  Micro Fabry-Perot interferometers in silica fibers machined by femtosecond laser. , 2007, Optics express.

[2]  W. Bogaerts,et al.  Experimental characterization of a silicon photonic biosensor consisting of two cascaded ring resonators based on the Vernier-effect and introduction of a curve fitting method for an improved detection limit. , 2010, Optics express.

[3]  C. Liao,et al.  Optical fiber Fabry-Perot interferometer cavity fabricated by femtosecond laser micromachining and fusion splicing for refractive index sensing. , 2012, Optics express.

[4]  J. Villatoro,et al.  Spheroidal Fabry-Perot microcavities in optical fibers for high-sensitivity sensing. , 2012, Optics express.

[5]  Y. Rao,et al.  Microbubble based fiber-optic Fabry-Perot interferometer formed by fusion splicing single-mode fibers for strain measurement. , 2012, Applied optics.

[6]  Mario La Notte,et al.  Ultra high sensitivity chemical photonic sensing by Mach–Zehnder interferometer enhanced Vernier-effect , 2013 .

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

[8]  C. E. Campanella,et al.  Split-mode fiber Bragg grating sensor for high-resolution static strain measurements. , 2014, Optics letters.

[9]  Yaxun Zhang,et al.  Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous measurement of strain and temperature. , 2014, Optics letters.

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

[11]  Hwa-Yaw Tam,et al.  In-line open-cavity Fabry-Pérot interferometer formed by C-shaped fiber fortemperature-insensitive refractive index sensing. , 2014, Optics express.

[12]  C. Liao,et al.  High-sensitivity strain sensor based on in-fiber improved Fabry-Perot interferometer. , 2014, Optics letters.

[13]  Yi Jiang,et al.  High-temperature fiber-optic Fabry-Perot interferometric sensors. , 2015, The Review of scientific instruments.

[14]  Dong-xu Yang,et al.  A Bias-Free Quantum Random Number Generation Using Photon Arrival Time Selectively , 2015, IEEE Photonics Journal.

[15]  Mingran Quan,et al.  Ultra-high sensitivity Fabry-Perot interferometer gas refractive index fiber sensor based on photonic crystal fiber and Vernier effect. , 2015, Optics letters.

[16]  Jing Zhao,et al.  High-sensitivity strain sensor based on in-fiber rectangular air bubble , 2015, Scientific Reports.

[17]  Peter Palffy-Muhoray,et al.  In-fiber Fabry-Perot interferometer for strain and magnetic field sensing. , 2016, Optics express.

[18]  Wenlong Yang,et al.  Sensitivity-enhanced temperature sensor by hybrid cascaded configuration of a Sagnac loop and a F-P cavity , 2017 .

[19]  Yongfeng Wu,et al.  Fiber-Optic Hybrid-Structured Fabry–Perot Interferometer Based On Large Lateral Offset Splicing for Simultaneous Measurement of Strain and Temperature , 2017, Journal of Lightwave Technology.

[20]  Ben Xu,et al.  Multimode fiber tip Fabry-Perot cavity for highly sensitive pressure measurement , 2017, Scientific Reports.

[21]  Deming Liu,et al.  Sensitivity amplification of fiber-optic in-line Mach-Zehnder Interferometer sensors with modified Vernier-effect. , 2017, Optics express.

[22]  Jing Zhang,et al.  Refractive Index and Temperature Sensing Based on an Optoelectronic Oscillator Incorporating a Fabry–Perot Fiber Bragg Grating , 2018, IEEE Photonics Journal.

[23]  Wei Huang,et al.  Suppression of parasitic interference in a fiber-tip Fabry-Perot interferometer for high-pressure measurements. , 2018, Optics express.