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Simultaneous measurement of strain and temperature based on a long-period grating with a polarization maintaining fiber in a loop mirror |
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| Affiliation: | 1. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China;2. Hangzhou Institute of Calibration and Testing for Quality and Technical Supervision, Hangzhou, Zhejiang 310018, China;1. Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectric Science and Engineering, South China Normal University, Guangzhou 510006, China;2. School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China;1. Institute of Optoelectronic Technology, China Jiliang University, Xueyuan Street, Xiasha Higher Education Zone, Hangzhou 310018, China;2. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China |
| Abstract: | Simultaneous measurement of strain and temperature using a long-period grating (LPG) and a polarization maintaining fiber (PMF) in a fiber loop mirror (FLM) is presented. The sensing head is formed by an LPG. The transmitted optical intensity from the FLM is linear with the variation of the strain. And the interference resonant dip has a blue shift with the increasing of the temperature. Experimental results show that the proposed sensor has the sensitivities of 0.0346 nm/°C and 1.82 × 10?3 dB/με within the strain range of 0–1300 με, respectively. |
| Keywords: | Long-period fiber grating Polarization maintaining fiber Fiber loop mirror |
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