摘要
A temperature and refractive index sensor based on fiber Bragg grating(FBG)end surface cascade open Fabry-Pérot(FP)cavity has been designed and demonstrated experimentally.The open FP cavity has been fabricated on the end face of an FBG by dislocation fusion in this work,the open FP cavity could be used for refractive index sensing,and the temperature is measured by the FBG.The working principle of the sensor and the method of improving the sensitivity are analyzed by theoretical simulation.The refractive index sensitivity of the sensor is 1108.4 nm/RIU,while the maximum fluctuation of the sensor stability experiment detection is 0.005 nm.The results show that it has satisfactory characteristics.The sensor is a compact all-fiber structure,so it has potential applications in the field of temperature refractive index sensing,such as biomedical and capacitor electrolyte detection.
基金
supported in part by the National Natural Science Foundation of China (Nos.61735014 and 61927812)
the Shaanxi Provincial Education Department (No.18JS093)
the Natural Science Basic Research Program of Shaanxi Province (No.2024JC-YBMS_530)
the Operation Fund of Logging Key Laboratory of Group Company (No.2021DQ0107-11)
the Graduate Student Innovation Fund of Xi’an Shiyou University (Nos.YCS23213178 and YCS22213185)。
