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Sucrose refractive index sensing characterization of laser processed optical fiber Fabry-Perot micro-cavity

QING TAO1,2, YEGANG YIN1, WENXIANG KUANG1, LIANGPENG WEI1, JIAN CHENG1, BOWEN LU3, DUN LIU1,*

Affiliation

  1. Laser Group, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
  2. Hubei Key Laboratory of Modern Manufacturing Quantity Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, Hubei, P. R. China
  3. State Key Laboratory of Optical Fiber and Cable Manufacture Technology (YOFC), Wuhan 430068, China

Abstract

In this paper, a Fabry-Perot micro-cavity sensor have been successfully fabricated by femtosecond laser. The optimal etching parameters of Fabry-Perot micro-cavity are obtained. Length of Fabry-Perot micro-cavity is between 45 μm and 60 μm, height of Fabry-Perot micro-cavity is between 70 μm and 75 μm, and inclined angle of φ is less than 1.3°. The sensor exhibits better sucrose refractive index sensitivity of -30.69 dB/RIU and linearity of 98.7%. After using CL3-AMW method and improved data fusion algorithm, the sensitivity of sucrose refractive index attains -31.98 dB/RIU and linearity increases to 99.58%. The sensing performance of optical fiber Fabry-Perot micro-cavity is effective.

Keywords

Optical Fiber Fabry-Perot micro-cavity, Femtosecond laser, Refractive index sensing, CL3-AMW method, Improved data fusion algorithm.

Citation

QING TAO, YEGANG YIN, WENXIANG KUANG, LIANGPENG WEI, JIAN CHENG, BOWEN LU, DUN LIU, Sucrose refractive index sensing characterization of laser processed optical fiber Fabry-Perot micro-cavity, Optoelectronics and Advanced Materials - Rapid Communications, 17, 9-10, September-October 2023, pp.398-408 (2023).

Submitted at: March 7, 2023

Accepted at: Oct. 9, 2023