Simultaneous multi-parameter measurement using Sagnac loop hybrid interferometer based on a highly birefringent photonic crystal fiber with two asymmetric cores.

We have experimentally investigated the multi-parameter sensing characteristics in a novel all-fiber Sagnac loop hybrid interferometer based on a highly birefringent photonic crystal fiber with two asymmetric cores. The sensor device was based on a combination of two types of in-fiber interferences, the intra-core-mode Sagnac interference and the inter-core-mode Mach-Zehnder interference due to the distinct birefringent properties associated with the asymmetric cores. Fast Fourier transform analysis on the transmission spectra of the device exhibited six clear peaks in the spatial frequency domain. By examining the phase shift responses of two distinct Sagnac and one Mach-Zehnder interference peaks, the response matrix that enable simultaneous measurement of torsion, strain, and temperature could be obtained. The proposed all-fiber Sagnac loop hybrid interferometer has the advantages such as simplicity of the device structure, compact device size, and capability for simultaneous sensing of multiple parameters.

[1]  Xiaoyi Bao,et al.  Highly sensitive in-fiber interferometric refractometer with temperature and axial strain compensation. , 2013, Optics express.

[2]  Youngjoo Chung,et al.  Polarization dependent inter-core interferences in twin-core photonic crystal fiber and its application to high temperature measurement , 2012 .

[3]  J M Baptista,et al.  All Fiber Mach–Zehnder Interferometer Based on Suspended Twin-Core Fiber , 2010, IEEE Photonics Technology Letters.

[4]  Xinhuan Feng,et al.  High-birefringence fiber loop mirrors and their applications as sensors. , 2005, Applied optics.

[5]  Young-Geun Han,et al.  Strain and temperature sensitivities of an elliptical hollow-core photonic bandgap fiber based on Sagnac interferometer. , 2009, Optics express.

[6]  Hwa-Yaw Tam,et al.  Temperature-insensitive strain sensor with polarization-maintaining photonic crystal fiber based Sagnac interferometer , 2007 .

[7]  Philippe Roy,et al.  Fiber Loop Mirror Using a Small Core Microstructured Fiber for Strain and Temperature Discrimination , 2010, IEEE Photonics Technology Letters.

[8]  Youngjoo Chung,et al.  Twin core photonic crystal fiber for in-line Mach-Zehnder interferometric sensing applications. , 2009, Optics express.

[9]  Li Wei,et al.  Simultaneous measurement of strain and temperature based on a fiber Bragg grating combined with a high-birefringence fiber loop mirror , 2008 .

[10]  R O Claus,et al.  Polarization-independent all-fiber wavelength-division multiplexer based on a Sagnac interferometer. , 1995, Optics letters.

[11]  Tadeusz Martynkien,et al.  Measurements of polarimetric sensitivity to hydrostatic pressure, strain and temperature in birefringent dual-core microstructured polymer fiber. , 2010, Optics express.

[12]  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.

[13]  Youngjoo Chung,et al.  Temperature-Insensitive Torsion Sensor With Enhanced Sensitivity by Use of a Highly Birefringent Photonic Crystal Fiber , 2010, IEEE Photonics Technology Letters.

[14]  Shuisheng Jian,et al.  Highly Sensitive Torsion Sensor Based on Sagnac Interferometer Using Side-Leakage Photonic Crystal Fiber , 2011, IEEE Photonics Technology Letters.

[15]  Characteristics of transverse-stress-induced phase change through a distinct dual-mode fiber in a Sagnac loop. , 2013, Journal of the Optical Society of America. A, Optics, image science, and vision.

[16]  Bo Dong,et al.  Cladding-Mode Resonance in Polarization-Maintaining Photonic-Crystal-Fiber-Based Sagnac Interferometer and Its Application for Fiber Sensor , 2011, Journal of Lightwave Technology.

[17]  J M Baptista,et al.  Highly birefringent photonic bandgap Bragg fiber loop mirror for simultaneous measurement of strain and temperature. , 2011, Optics letters.

[18]  Byeong Ha Lee,et al.  Interferometric Fiber Optic Sensors , 2012, Sensors.

[19]  Jens Kobelke,et al.  Temperature- and strain-independent torsion sensor using a fiber loop mirror based on suspended twin-core fiber. , 2010, Optics letters.

[20]  J M Baptista,et al.  Simultaneous measurement of multiparameters using a Sagnac interferometer with polarization maintaining side-hole fiber. , 2008, Applied optics.

[21]  H Chi,et al.  Simultaneous measurement of axial strain, temperature, and transverse load by a superstructure fiber grating. , 2001, Optics letters.

[22]  D N Payne,et al.  Birefringence and polarization mode-dispersion in spun single-mode fibers. , 1981, Applied Optics.