摘要
提出了一种基于光纤布拉格光栅(FBG)拉锥的带宽可调的微光纤马赫-曾德尔干涉仪(MZI),该微光纤MZI的两端为关于中心束腰光纤对称的锥形微啁啾长周期光栅(CLPG)。对拉锥后的光栅周期及折射率分布进行了建模及仿真。折射率测试结果表明,MZI透射光谱带宽的倒数与氯化钠(NaCl)溶液折射率呈线性关系,通过改变NaCl溶液折射率可以调谐透射光谱带宽。对透射光谱1550 nm处的带宽进行了测量,得到折射率调谐带宽的精度为0.64318 nm^(-1)·RIU^(-1)。
A bandwidth tunable Mach-Zehnder interferometer(MZI)based on tapered-drawing fiber Bragg grating is presented.The two sides of this microfiber-assisted MZI are the tapered micro chirped long period fiber gratings(CLPG),which are symmetrical about the central waist.The period and refraction index of the grating after fused tapering are modelled and simulated.The refractive index test results show that the relationship between the refractive index of NaCl solution and the reciprocal of passband width is linear.The transmission bandwidth can be tuned by changing the solution concentration.The adjustable accuracy is 0.64318 nm-1·RIU-1 obtained after the detection of the transmission bandwidth at 1550 nm.
作者
耿健
朱晓军
章国安
徐晨
季彦呈
金丽
曹娟
Geng Jian;Zhu Xiaojun;Zhang Guoan;Xu Chen;Ji Yancheng;Jin Li;Cao Juan(School of Electronics and Information,Nantong University,Nantong,Jiangsu 226019,China;Nantong Research Institute for Advanced Communication Technologies,Nantong,Jiangsu 226000,China;Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province,Soochow University,Suzhou,Jiangsu 215006,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第3期119-126,共8页
Acta Optica Sinica
基金
江苏省研究生科研与实践创新计划(KYCX17_1918)
国家自然科学基金(61371113
61401241)
江苏重点实验室开放项目(KJS1204)
南通大学-南通智能信息联合研究中心(KFKT2016B04)
南通大学人才引进项目(03080670)
江苏省高校科研基金(16KJB510037)
