pp. 3335-3342
S&M2342 Research Paper https://doi.org/10.18494/SAM.2020.3008 Published: October 20, 2020 Sensing Properties of Thinned Phase-shifted Fiber Bragg Gratings [PDF] Jilei Yao, Shengli Pu,Yongxi Li, Rui Zhang, and Zixuan Jia (Received August 3, 2020; Accepted September 10, 2020) Keywords: phase-shifted fiber Bragg grating, side-polished fiber, refractive index, temperature, pump power
A π phase-shifted fiber Bragg grating (PS-FBG) with reduced diameter is proposed for sensing applications. To achieve high sensitivity, etching and side polishing are used to decrease the diameter of the PS-FBG. The transmission peak undergoes a clear redshift with the refractive index increasing, and the sensitivity is 3815 pm/RIU when the surrounding refractive index ranges from 1.41514 to 1.45450. The structure is also sensitive to ambient temperature from 25 to 55 °C. Experimental results show that the temperature sensitivities are 12.26, 12.54, and 19.51 pm/℃ for PS-FBGs with diameters of 125, 87, and 52 μm, respectively. The effect of the pump power on the sensing performance is also studied.
Corresponding author: Shengli PuThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Jilei Yao, Shengli Pu,Yongxi Li, Rui Zhang, and Zixuan Jia, Sensing Properties of Thinned Phase-shifted Fiber Bragg Gratings, Sens. Mater., Vol. 32, No. 10, 2020, p. 3335-3342. |