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Novel refractive index sensor based on fiber bragg grating in nano-bore optical fiber

  • Xiaohe Li
  • Sheng LiangEmail author
  • Yongxin Zhang
  • Qianqing Yu
  • Xinzhi Sheng
  • Shuqin Lou
  • Xin Wang
  • Wan Zhang
  • Mingli Dong
  • Lianqing Zhu
Article
  • 62 Downloads

Abstract

In this paper, we propose a novel refractive index sensor with large dynamic range based on fiber Bragg grating in the nano-bore optical fiber. The spectral responses of grating on the filling index in the bore with different bore diameters and index ranges are numerically studied by the finite element method and coupled mode theory based transmission matrix method. It is found that the Bragg wavelength of grating is sensitive to the filling index in the bore. The influences of bore diameter on the wavelength sensitivity, resolution and dynamic range of the index sensor are analyzed. There exists a trade off between the linear dynamic range and sensitivity of index when the bore diameter varies. The optimized wavelength sensitivity and resolution of filling index are 53.6923 nm/index unit and 9.3123 × 10−6 index under a linear index range of 1.0–1.4 using 2 µm bore diameter. The optimized linear dynamic range of index is 1.0–1.48 with wavelength sensitivity of 13.3056 nm/index unit and resolution of 3.7578 × 10−5 index using 1 µm bore diameter. Our proposed index sensor has the technical advantages of simple all-fiber structure, large index range, and potential capability to synchronously detect index, temperature and strain.

Keywords

Special optical fiber Microstructured fiber Nano-bore optical fiber Fiber-optic sensor Refractive index sensor Fiber Bragg grating (FBG) 

Notes

Acknowledgements

This work is supported by the Beijing Natural Science Foundation (4192047), the Fundamental Research Funds for the Central Universities (2018JBM070), the National Natural Science Foundation of China (61675019), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT_16R07).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Traffic and TransportationBeijing Jiaotong UniversityBeijingChina
  2. 2.Key Laboratory of Education Ministry on Luminescence and Optical Information Technology, National Physical Experiment Teaching Demonstration Center, Department of Physics, School of ScienceBeijing Jiaotong UniversityBeijingChina
  3. 3.Yangtze Optical Electronic Company Ltd.WuhanChina
  4. 4.Wuhan University of TechnologyWuhanChina
  5. 5.School of Electronic and Information EngineeringBeijing Jiaotong UniversityBeijingChina
  6. 6.Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Key Laboratory for Optoelectronics Measurement TechnologyBeijing Information Science and Technology UniversityBeijingChina

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