Refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber

A refractive index insensitive curvature sensor based on cladding-mode resonance of specialty triple-clad fiber (STCF) is proposed. The corresponding mode properties of STCF are investigated theoretically based on the coupled mode theory. The different mode dispersion curves are calculated and a resonance wavelength is obtained. A straightforward experiment is performed to prove the curvature sensitivity. Experimental results shows that the curvature sensitivity can be achieve -11.03374nm/m-1 in the range of 0~1.17m-1, and it also has good linearity. This curvature sensor has the advantages of simple structure, easy manufacturing, highly sensitivity and has no cross-sensitivity when it compared to the other sensors. Thus it can be used for curvature monitoring in time.

[1]  Ginu Rajan,et al.  Hybrid Fiber Optic Sensor System for Measuring the Strain, Temperature, and Thermal Strain of Composite Materials , 2014, IEEE Sensors Journal.

[2]  Jing Zhao,et al.  Asymmetrical in-fiber Mach-Zehnder interferometer for curvature measurement. , 2015, Optics express.

[3]  Bong-Ahn Yu,et al.  Highly sensitive strain and bending sensor based on in-line fiber Mach–Zehnder interferometer in solid core large mode area photonic crystal fiber , 2010 .

[4]  Xinyong Dong,et al.  Polarization-dependent curvature sensor based on an in-fiber Mach-Zehnder interferometer with a difference arithmetic demodulation method. , 2012, Optics express.

[5]  Roger Haynes,et al.  Long period grating in multicore optical fiber: an ultra-sensitive vector bending sensor for low curvatures. , 2014, Optics letters.

[6]  X. Qiao,et al.  High-Sensitivity Mach–Zehnder Interferometric Curvature Fiber Sensor Based on Thin-Core Fiber , 2015, IEEE Sensors Journal.

[7]  J E Antonio-Lopez,et al.  Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber. , 2015, Optics letters.

[8]  J. Canning,et al.  Long-period gratings for selective monitoring of loads on a wind turbine blade. , 2014, Applied optics.

[9]  Yung-Shin Sun,et al.  Simulation and experiments for optimizing the sensitivity of curved D-type optical fiber sensor with a wide dynamic range , 2015 .

[10]  Weihong Bi,et al.  Refractive index insensitive temperature sensor based on specialty triple-clad fiber. , 2015, Optics express.

[11]  Wenjun Zhou,et al.  Fiber-Optic Curvature Sensor Based on Cladding-Mode Bragg Grating Excited by Fiber Multimode Interferometer , 2012, IEEE Photonics Journal.

[12]  Yongxing Jin,et al.  Curvature sensor based on a pressure-induced birefringence single mode fiber loop mirror , 2014 .

[13]  Li Wang,et al.  Bending Vector Sensor Based on a Sector-Shaped Long-Period Grating , 2015, IEEE Photonics Technology Letters.

[14]  Yi Li,et al.  Curvature sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber , 2014 .

[15]  A. Carullo,et al.  Design and characterization of curvature sensors based on plastic optical fibers for structural monitoring , 2013, 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).