基于CO_(2)激光技术的双峰谐振长周期光纤光栅折射率传感器  

Dual-Peak Resonance Long-Period Fiber Grating Refractive Index Sensor Based on CO_(2)Laser Technology

作　　者：赵爽 杜超 王秋雨 贾斌 张丽 崔丽琴 邓霄 Zhao Shuang;Du Chao;Wang Qiuyu;Jia Bin;Zhang Li;Cui Liqin;Deng Xiao(College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University,Taiyuan 030006,Shanxi,China)

机构地区：[1]太原理工大学物理与光电工程学院,山西太原030024 [2]太原理工大学新型传感器与智能控制教育部和山西省重点实验室,山西太原030024 [3]山西大学量子光学与光量子器件国家重点实验室,山西太原030006

出　　处：《激光与光电子学进展》2024年第5期204-210,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62203320,52009088);中国博士后科学基金面上项目(2019M661063);量子光学与光量子器件国家重点实验室开放课题(KF202210);山西省科技厅面上青年基金(201901D211073);山西省社会发展重点研发计划(201903D321001);山西省高等学校科技创新项目(2019L0198)。

摘　　要：为了探索一种高灵敏折射率传感器,基于CO_(2)激光技术制备出双峰谐振长周期光纤光栅(LPFG)。首先,利用CO_(2)激光器在腐蚀包层后的传统单模光纤和80μm弯曲不敏感光纤上制备出周期分别为196μm和73μm的双峰谐振LPFG,证明了采用CO_(2)激光微加工技术在单模光纤上制备短周期LPFG的可能性。其次,利用CO_(2)激光器直接在2种80μm单模光纤上制备出周期分别为110μm和115μm的双峰谐振LPFG。实验结果表明:在2种80μm单模光纤上制备的LPFG具有谐振损耗大,插入损耗小和折射率灵敏度高等优点。基于以上优点,采用CO_(2)激光技术制备的双峰谐振LPFG在生物、化学及环境参数检测等重要领域的应用具有较大潜力。同时,也提供了一种操作简单、低成本制备双峰谐振LPFG的方法。A dual-peak resonance long-period fiber grating(LPFG)based on CO_(2)laser technology is proposed to investigate a highly sensitive refractive index sensor.First,dual-peak resonance LPFGs with grating periods of 196 and 73μm are fabricated in conventional single-mode fiber and 80μm bend-insensitive single-mode fiber,respectively,using a CO_(2)laser after etching cladding.This demonstrates the possibility of fabricating an LPFG on a single-mode fiber with a shorter grating period using CO_(2)laser micromachining technology.Dual-peak resonance LPFGs with grating periods of 110 and 115μm are directly fabricated in two 80μm single-mode fibers using a CO_(2)laser.The results show that the dualpeak resonance LPFGs fabricated in two 80μm thin single-mode fibers exhibit advantages of deep attenuation loss,low loss,and high refractive index sensitivity.Based on its excellent performance,the dual-peak resonance LPFG based on CO_(2)laser technology is a prospective sensor applicable to fields such as biological,chemical,and environmental parameter detection.In addition,a simple-operation low-cost method for fabricating dual-peak resonance LPFGs is proposed.

关 键 词：光纤光学 长周期光纤光栅 双峰谐振 CO_(2)激光技术 折射率 

分 类 号：TN253[电子电信—物理电子学]