Temperature Characteristic of SMPMS Fiber Structure-Based Sagnac Loop

A novel, cost-efficient all-fiber temperature sensor is proposed and demonstrated experimentally. The sensor consists of single-mode-multimode-polarization-maintaining-multimode-single-mode fiber structure reeled into a circle based on a Sagnac loop. Its temperature characteristic is investigated experimentally. The temperature sensitivity reaches up to 1.476 nm/°C for the radius of 7 cm. Experimental results show that the radius has significant influence on temperature sensitivity and the theoretical analysis is expressed.

[1]  Light Coupling Between a Singlemode- Multimode-Singlemode (SMS) Fiber Structure and a Long Period Fiber Grating , 2011, Journal of Lightwave Technology.

[2]  Gang-Ding Peng,et al.  Wavelength-encoded fiber-optic temperature sensor with ultra-high sensitivity , 2008 .

[3]  Yuliya Semenova,et al.  Strain sensor based on a pair of single-mode-multimode-single-mode fiber structures in a ratiometric power measurement scheme. , 2010, Applied optics.

[4]  Ravi K. Varshney,et al.  Transmission characteristics of SMS fiber optic sensor structures , 2003 .

[5]  Li Yang,et al.  Super-High Sensitivity of Fiber Temperature Sensor Based on Leaky-Mode Bent SMS Structure , 2013, IEEE Photonics Technology Letters.

[6]  Li Wei,et al.  Low-cost high-sensitivity strain and temperature sensing using graded-index multimode fibers. , 2007, Applied optics.

[7]  J. Meunier,et al.  Strain and Temperature Sensing Characteristics of Single-Mode–Multimode–Single-Mode Structures , 2009, Journal of Lightwave Technology.

[8]  Yuliya Semenova,et al.  Experimental demonstration of a simple displacement sensor based on a bent single-mode–multimode–single-mode fiber structure , 2011 .

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

[10]  Yuliya Semenova,et al.  Use of a Bent Single SMS Fiber Structure for Simultaneous Measurement of Displacement and Temperature Sensing , 2011, IEEE Photonics Technology Letters.

[11]  D Ethonlagi,et al.  Fiber-optic microbend sensor structure. , 1997, Optics letters.

[12]  Chongxiu Yu,et al.  Fiber refractometer based on a fiber Bragg grating and single-mode-multimode-single-mode fiber structure. , 2011, Optics letters.