摘要
提出并实现了一种用于双参量同时测量的强耦合七芯光纤布拉格光栅(SCF-FBG)。在透射光谱中观察到2个布拉格谐振峰,对应SCF的类HE11和类HE12超模式反向谐振耦合。该传感器由SCF拼接在中心对齐的2个标准单模光纤构成,其透射谱中还包括由超模式间的马赫-曾德尔干涉产生的干涉条纹。分别测量了该器件对温度和应变的响应,结果表明:2个布拉格谐振峰的温度灵敏度分别为9.56 pm/℃和9.55 pm/℃,应变灵敏度分别为0.64 pm/με和0.584 pm/με。其中,干涉谷的温度灵敏度和应变灵敏度分别为11.8 pm/℃和−0.925 pm/με,因此该器件能够同时用于温度和应变的测量。
This study develops and demonstrates a sensor based on a strongly coupled sevencore fiber(SCF)supermode Bragg grating for multiparameter measurements.Two Bragg resonance notches are observed in the transmission spectrum,corresponding to HE11-like and HE12-like supermodes of the SCF.Because the SCF is spliced between two standard singlemode fibers with central alignments at both ends,the transmission spectrum of the device also comprises an interferometric profile owing to the MachZehnder interference of the supermodes.The responses of the device to temperature and strain are experimentally characterized.The obtained temperature and strain sensitivities of the supermode Bragg grating notches are 9.56 pm/℃,9.55 pm/℃and 0.64 pm/με,0.584 pm/με,respectively.The obtained temperature and strain sensitivities of interferometric dips are 11.8 pm/℃and−0.925 pm/με,respectively.This device can be potentially used to measure the temperature and strain simultaneously.
作者
董贤
谢友航
武创
李杰
关柏鸥
Dong Xian;Xie Youhang;Wu Chuang;Li Jie;Guan Baiou(Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications,Institute of Photonics Technology,Jinan University,Guangzhou 511443,Guangdong,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第9期203-208,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(62075087)
广东省自然科学基金(2014A030306040,2018A030313440)
广东省特支计划科技创新青年拔尖人才(2016TQ0X24,2019TQ0X36)
广州市珠江科技新星(20180610197)。
