中国光学（中英文）2024，Vol.17Issue(2)：291-299,9.DOI:10.37188/CO.2023-0101
基于双峰谐振长周期光纤光栅的海水盐度传感器
A seawater salinity sensor based on dual peaks resonance long period fiber grating
摘要
Abstract
To develop a highly sensitive seawater salinity sensor,a long period fiber grating(LPFG)was suc-cessfully fabricated using CO2 laser technology to function in close proximity to the dispersion turning point(DTP).An LPFG operating near DTP was fabricated in an 80 μm single mode fiber using CO2 laser mi-cromachining technology.This successful endeavor demonstrates the feasibility of developing LPFG with shorter grating period using CO2 laser micromaching technology.LPFGs with varying periods were fabric-ated by adjusting the preparation period of CO2 laser to ensure that the cladding mode LP1,9 was operating near DTP,resulting in higher refractive index sensitivity of LPFG.The average sensitivity of 0.279 nm/‰ can be achieved in the seawater with salinity ranging from 5.001‰ to 39.996‰,especially with the dual peaks resonance LPFG at a period of 115.4 μm,thanks to the dual peaks resonance effect.The dual peaks resonance LPFG seawater salinity sensor exhibits high sensitivity and a large attenuation loss,suggesting po-tential application in seawater salinity monitoring.关键词
光纤光学/长周期光纤光栅/色散转折点/海水盐度/CO2 激光技术Key words
fiber optics/long period fiber grating/dispersion turning point/seawater salinity/CO2 laser tech-nology分类
信息技术与安全科学引用本文复制引用
杜超,赵爽,宋桦可,王秋雨,贾斌,张丽,崔丽琴,赵强,邓霄..基于双峰谐振长周期光纤光栅的海水盐度传感器[J].中国光学（中英文）,2024,17(2):291-299,9.基金项目
国家自然科学基金(No.62203320,No.62375198,No.52009088,No.61933004) （No.62203320,No.62375198,No.52009088,No.61933004）
中国博士后科学基金面上项目(No.2019M661063) （No.2019M661063）
山西省回国留学人员科研资助项目(No.2023-039) （No.2023-039）
崂山实验室科技创新项目(No.LSKJ202204703)Supported by National Natural Science Foundation of China(No.62203320,No.62375198,No.52009088,No.61933004) （No.LSKJ202204703）
Project funded by China Postdoctoral Science Foundation(No.2019M661063) （No.2019M661063）
Research Project Supported by Shanxi Scholarship Council of China(No.2023-039) （No.2023-039）
Science and Technology Innovation Project of Laoshan Laboratory(Qingdao)(No.LSKJ202204703) （Qingdao）
