基于光纤旋转连接器的光纤耦合效率研究  

Research on Coupling Efficiency Based on Fiber Optic Rotary Joints

作　　者：宋巍 谢友金[1,2] 李治国[1,2] 郝伟[1,2] 闫佩佩[1,2] 李昕[1,2] 孙传东[1] SONG Wei;XIE Youjin;LI Zhiguo;HAO Wei;YAN Peipei;LI Xin;SUN Chuandong(Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Science,Xi'an 710119,China;Key Laboratory of Space Precision Measurement Technology,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Science,Xi'an 710119,China;University of Chinese Academy of Science,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]中国科学院西安光学精密机械研究所中国科学院空间精密测量重点实验室,西安710119 [3]中国科学院大学,北京100049

出　　处：《光子学报》2022年第11期96-107,共12页Acta Photonica Sinica

基　　金：中国科学院青年创新促进会(No.2018441)。

摘　　要：基于渐变折射率透镜准直器一定程度上可以提高空间光-光纤耦合效率,但会引入光纤与渐变折射率透镜装配误差和渐变折射率透镜间位置误差。鉴于以上两种误差情况,本文提出了修正光纤与渐变折射率透镜装配误差的位移法和基于楔形棱镜和平板玻璃的光束指向调整法。首先运用光线传输矩阵的数学分析方法建立了光线传输模型,分析当光纤与渐变折射率透镜存在距离误差和位置误差下耦合效率的变化,最后利用位移法降低了距离误差对插入损耗的影响,使系统插入损耗降低至0.2 dB。在存在位置误差下利用光束指向调整法降低插入损耗至0.7 dB。这两种方法可以有效提升光纤旋转连接器耦合效率。As an important part of modern communication system,satellite communication undertakes important tasks such as communication,earth observation,navigation and positioning in military and civil fields.The traditional spaceborne optoelectronic load realizes the data signal and power transmission between the relative rotating bodies through the slip rings.With the continuous development of optical fiber technology and related components,laser communication with optical fiber as the transmission medium has gradually replaced the traditional signal transmission with wires.The fiber optic rotary joints have the characteristics of a wide communication frequency band,strong anti-electromagnetic interference ability,strong confidentiality ability,fast transmission rate,low loss,etc.Its performance largely determines the service life of the satellite.Low loss and high reliability are important indicators of single-channel fiber optic rotary joints.This paper takes the single-channel fiber optic rotary joints as the research object.In order to achieve its low loss and high reliability goals,it is necessary to explore the factors affecting the insertion loss.The gap between the single-mode fiber and the gradient-index lens and the position error between the two gradient-index lens collimators are all important factors that affect the insertion loss of the fiber optic rotary connector.The Gaussian beam coupling has attracted the attention of universities and research institutions from all over the world.But the previous analysis ignored the influence of the position error between the fiber and the gradient-index lens on the coupling efficiency.There is no corresponding compensation method for the above-mentioned errors,which is crucial for improving performance parameters and reducing the difficulty of processing and assembly.This paper takes the single-channel fiber optic rotary joints as the research object.In order to achieve the goals of low loss and high reliability,it is necessary to explore the factors affecting the ins

关 键 词：光纤传输系统 插入损耗 激光通信 渐变折射率透镜 光线传输模型 光纤旋转连接器 耦合效率 

分 类 号：TN256[电子电信—物理电子学]