Simultaneous strain and temperature measurement with a single fiber Bragg grating based on the polarization properties analysis |
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| Authors: | Yiping Wang Ming Wang Xiaoqin Huang |
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| Affiliation: | 1. Department of Oral & Maxillofacial–Head & Neck Oncology, Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University, School of Medicine, China;2. Department of Oral Pathology, Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University, School of Medicine, China;1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;2. Institute of Gravitation and Cosmology, Department of Physics, School of Mathematics and Physics, Bohai University, Jinzhou 121013, China;3. Shanghai Key Laboratory of High Temperature Superconductors, Shanghai 200444, China;4. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;1. Laboratory of Optoelectronics and Optical Communications, Department of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;2. Henan Key Laboratory of Laser and Opto-electric Information Technology, Zhengzhou University, Henan 450052, China;1. Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, China;2. Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China |
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| Abstract: | In this paper, a new technique for discrimination of temperature and strain exploiting the polarization properties of a single normal fiber Bragg grating (FBG) is firstly proposed and experimentally demonstrated. The spectral characterization of the differential group delay (DGD) of the FBG is studied. The evolution of the DGD response of the FBG as a function of temperature and strain is analyzed. The numerical simulations and experimental results suggest that implementing two independent measurements of the resonance wavelength shift and the changes of the DGD can discriminate the temperature and strain effects. |
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