HOU Meijiang, TIAN Jing. Study on temperature sensing characteristics based on π-PSFBG[J]. 2020, (11): 50-52. DOI: 10.13873/J.1000-9787(2020)11-0050-03.
A simple sensing system for temperature measurement using π phase-shift fiber Bragg grating( π-PSFBG) is proposed. The system utilizes the narrow bandwidth feature of the π phase-shift grating to significantly improve the system sensitivity
and structure of system is simple and easy to operate. The temperature sensing characteristics of the sensor is experimentally verified. The results show that the center wavelength of the π-PSFBG changes linearly with the increase of temperature
linear fitting R2 is 0. 999 5
and the temperature sensitivity is about 10. 2 pm/℃ .