Investigation on micro/nanofiber Bragg grating for refractive index sensing |
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| Authors: | Ruibing Liang Qizhen Sun Jianghai Wo Deming Liu |
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| Institution: | 1. The college of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, P.R. China;2. National Engineering Laboratory for Next Generation Internet Access System, Wuhan 430074, Hubei, P.R. China;1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Photonics Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China;2. Laser Physics Centre, Australian National University, Canberra, Australian Capital Territory 2601, Australia;3. Key Lab of In-fibre Integrated Optics, Ministry of Education of China, Harbin Engineering University, Harbin 150080, China;1. Laser and Optics Research School, NSTRI, Tehran, Iran;2. Department of Physics, Iran University of Science and Technology, Narmak, Tehran, Iran;1. Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China;2. Joint Research Laboratory of Optics of Zhejiang Normal University and Zhejiang University, Hangzhou 310058, China;1. College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Opto-electronics Information Technology (Tianjin University) Ministry of Education, Tianjin 300072, China;3. Department of Mechanical Engineering, Columbia University, New York 10027, USA;1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Photonics Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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| Abstract: | We propose a refractometric sensor based on micro/nanofiber Bragg grating (MNFBG). The refractive index (RI) sensing performance dependence on the fiber radius and Bragg grating period of the sensor, as well as the temperature cross-sensitive effect, is investigated theoretically. The simulation results demonstrate that 400 nm-radius MNFBG has a linear response to RI ranging from 1.3 to 1.39 with a sensitivity as high as 992.7 nm/RIU and half temperature cross-sensitivity of normal FBG. A maximum sensitivity of up to 1200 nm/RIU and an outstanding RI resolution of 8.3 × 10-6 can be achieved. MNFBG has high potential in various types of optical fiber sensor applications. |
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