摘要
提出了一种通过化学腐蚀对双包层大模场光纤进行加工,并结合放电熔接工艺制备光纤法布里-珀罗(Fabry-Perot,F-P)传感器的方法。将尺寸为20/125μm的双包层大模场光纤端面切平后在浓度为40%氢氟酸中浸泡20 min使光纤端面形成凹槽,再与端面切平的HI-1060光纤进行熔接,在熔接点处形成气泡,构成全光纤F-P腔结构,反射谱波长周期为9 nm,条纹对比度达到9. 55 dB。采用等强度梁对传感器的应变特性进行测试与分析,在0~350με范围内分别进行加载与卸载实验,波长灵敏度大于2. 88 pm/με,线性度高于0. 99。
Large-mode-area double-clad fiber fabricated by chemical corrosion was proposed The method of fabricating Fabry-Perot(F-P)sensor was combined with discharge welding technology.The end face of large-mode-area double-clad fiber with the size of 20/125μm was immersed in hydrofluoric acid with concentration of 40%for 20 min to form a groove.Then it was spliced with HI-1060 whose end face was plane.Bubbles were formed at the fusion junction to form the whole fiber F-P cavity structure.The reflectance spectrum has a wavelength cycle of 9 nm and a stripe contrast of 9.55 dB.The strain characteristic of the sensor was tested and analyzed by the equal strength beam.In the load and upload test range of 0~350με,the sensitivity was more than 2.88 pm/μεand linearity was 0.99 dB in the test range of 3~350με.
作者
周康鹏
何巍
张雯
骆飞
祝连庆
ZHOU Kang-peng;HE Wei;ZHANG Wen;LUO Fei;ZHU Lian-qing(Beijing Information Science and Technology University,Beijing Engineering Research Center of Optoelectronic Information and Instruments,Beijing Key Laboratory of Optoelectronic Test Technology,Beijing 100016,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2018年第9期1-4,7,共5页
Instrument Technique and Sensor
基金
教育部长江学者与创新团队发展计划项目(IRT-16R07)；北京市科技计划项目(Z151100003615010)；北京市教委2015年度创新能力提升计划项目(TJSHG201510772016)；北京信息科技大学“勤信人才”培育计划资助项目(QXTCPC201702)
关键词
双包层大模场光纤
单模光纤
化学腐蚀
氢氟酸
法布里-珀罗
应变
large-mode-area double-clad fiber
single-mode fiber
chemical etching
hydrofluoric acid
Fabry-Perot
strain
作者简介
周康鹏(1991—),硕士研究生,主要从事光纤传感及飞秒激光加工。E-mail:fishmore0228@sina.com;祝连庆(1963—),教授,主要研究方向为光纤传感、光纤激光器和光电精密测试技术等。
