多维耦合器校正空间光-单模光纤耦合对准误差  被引量:9

Correction of Alignment Error in Coupling Space Light into Single-Mode Fiber by Multi-Dimensional Coupler

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作  者:吴加丽 柯熙政[1,2,3] 杨尚君 王勇哲 尹奔康 Wu Jiali;Ke Xizheng;Yang Shangjun;Wang Yongzhe;Yin Benkang(School of Automation and Information Engineering,Xi′an University of Technology,Xi′an,Shaanxi 710048,China;Shaanxi Civil-Military Integration Key Laboratory of Intelligence Collaborative Networks,Xi′an,Shaanxi 710048,China;School of Physics and Telecommunications Engineering,Shaanxi University of Technology,Hanzhong,Shaanxi 723001,China;Department of Communication Engineering,School of Automation and Information Engineering,Xi′an University of Technology,Xi′an,Shaanxi 710048,China)

机构地区:[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]陕西省智能协同网络军民共建重点实验室,陕西西安710048 [3]陕西理工大学物理与电信工程学院,陕西汉中723001 [4]西安理工大学自动化与信息工程学院通信工程系,陕西西安710048

出  处:《光学学报》2022年第7期32-42,共11页Acta Optica Sinica

基  金:陕西省科研计划项目(18JK0341);陕西省重点产业创新项目(2017ZDCXL-GY-06-01);西安市科技计划项目(2020KJRC0083)。

摘  要:根据高斯光束传输理论,分析了径向偏差、端面倾斜偏差和轴向偏差等对准误差对空间光-单模光纤(SMF)耦合效率的影响。数值计算和实验结果表明,当端面与径向之间的夹角Ω为90°和270°时,3种对准误差对耦合效率的影响相互独立,当夹角Ω=180°时,耦合效率有最大值。为更好地补偿对准误差对SMF耦合效率的影响,基于压电陶瓷设计了具有5自由度耦合装置的光纤耦合器,并结合变增益型随机并行梯度下降算法寻找空间光-SMF的最佳对准姿态。实验结果表明,5自由度光纤耦合器可以很好地实现不同对准误差的校正,系统闭环后SMF耦合效率达到53.2%。The Gaussian beam propagation theory is employed to analyze the effects of alignment errors including radial offset,end face tilt offset,and axial offset on the efficiency of coupling between the space light and single-mode fiber(SMF).The numerical and experimental results show that when the angle Ω between the end face and radial direction is 90° and 270°,the effects of the three alignment errors on the coupling efficiency are independent from each other.When the angle Ω is 180°,the coupling efficiency reaches the maximum value.To better compensate the influence of alignment errors on the SMF coupling efficiency,we design an optical fiber coupler with a 5 degree-of-freedom coupling structure on the basis of piezoelectric ceramics and the stochastic parallel gradient descent algorithm with a variable gain to find the optimal alignment attitude for coupling space light into SMF.The experimental results show that the 5 degree-of-freedom optical fiber coupler can effectively correct different alignment errors and that the SMF coupling efficiency reaches 53.2% when the system is in closed-loop state.

关 键 词:光通信 高斯光束 耦合效率 随机并行梯度下降算法 

分 类 号:TN929.12[电子电信—通信与信息系统]

 

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