微纳光纤耦合环镜及其光谱调控特性研究  

Study on Micro-nano Fiber Coupled Ring Mirror and Its Spectral Controllability

作　　者：郭传臣 杨敏 崔倩倩 林政 魏石磊 李丽君 孙佳佳 GUO Chuanchen;YANG Min;CUI Qianqian;LIN Zheng;WEI Shilei;SUN Jiajia;LI Lijun(Tiezheng Testing Technology Co.,Ltd.,Jinan 250014,China;College of Electronic and Information Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Nock Communication Technology Co.,Ltd.,Qingdao 266499,China)

机构地区：[1]铁正检测科技有限公司,济南250014 [2]山东科技大学电子信息工程学院,山东青岛266590 [3]青岛诺克通信技术有限公司,山东青岛266499

出　　处：《光通信研究》2025年第1期45-51,共7页Study on Optical Communications

基　　金：国家重点研发计划资助项目(2023YFB3711400);国家青年基金资助项目(42106187);山东省教育厅资助项目(JO6P14);青岛西海岸新区揭榜挂帅资助项目(2021-9);矿山灾害国家重点实验室资助项目(MDPC2022ZR04)。

摘　　要：【目的】在微纳光纤耦合器的基础上,文章提出了一种微纳光纤耦合环镜结构,对其光谱与环镜内光偏振态、锥区微纳光纤长度以及周围介质折射率之间的关系开展了理论仿真与实验研究。【方法】理论上,分析了微纳光纤耦合器的基本原理,仿真了弱耦合和强耦合情况下的微纳光纤耦合器光场分布特性以及微纳光纤环镜的光谱偏振可调控特性。实验验证了光谱偏振可调控特性、自由光谱范围调控特性以及波长调控特性。【结果】结果显示,当圆环形偏振控制器的1/2波片角度在-90~90°调谐过程中,干涉光谱的周期和峰值波长保持不变,消光比随波片角度的改变呈现规律性变化且在波片偏转45°时达到最小,90°时达到最大;随着腰锥长度的增加,微纳光纤耦合器环镜梳状谱的通道间隔和自由光谱范围逐渐减小;周围折射率在1.3320~1.3355范围内变化,波长随折射率的增大而发生红移,灵敏度可达18350 nm/RIU。【结论】可见,通过对微纳光纤耦合器内部耦合的光偏振态、微纳锥区长度和耦合器结构周围介质折射率等的调控,可以实现相应输出光谱的改变,这为构建新型全光纤器件提供了一种新的途径,其不仅可以作为激光器中的波长选择和调控元件应用于激光器,优化激光输出特性,还可应用于生物医学等传感领域来实现液体成分的高精度检测等。【Objective】Based on the micro-nano fiber coupler,this paper proposes a micro-nano fiber coupled ring mirror structure.Theoretical simulations and experimental studies are conducted to investigate the relationship between its spectrum and the polarization state of light within the ring mirror,the length of the micro-nano fiber in the tapered region,and the refractive index of the surrounding medium.【Methods】Theoretically,the basic principle of micro-nano fiber coupler is analyzed,and the optical field distribution of micro-nano fiber coupling and the spectral polarization of micro-nano fiber ring mirror are simulated.Experimentally,the spectral controllability is verified.【Results】The results show that when the half-wave plate angle of the circular polarization controller is adjusted at-90~90°,the period and the peak wavelength remains constant.The extinction ratio changes regularly with the angle and reaches the minimum at 45°,as well as the maximum at 90°.As the length of the waist cone increases,the channel interval and the free spectral range of the ring mirror comb spectrum presents gradually decrease.As the surrounding refractive index varies in the range of 1.3320 to 1.3355,the output interference wavelength is red-shift with 18350 nm/RIU sensitivity.【Conclusion】In summary,by adjusting the polarization state of the coupled light inside the micro-nano fiber coupler,the length of the micro-nano tapered region,and the refractive index surrounding the coupler structure,corresponding changes in the output spectrum can be achieved.This provides a new approach for constructing novel all-fiber devices.These devices can not only be used as wavelength selection and regulation components in lasers to optimize laser output characteristics,but also applied in sensing fields such as biomedicine for high-precision detection of liquid components.

关 键 词：微纳光纤耦合器 光纤环镜 光谱 强耦合 梳状谱滤波器 

分 类 号：TN303[电子电信—物理电子学]