基于3×1光子灯笼实现大模场光纤模式控制  

Mode control of large-mode-area fiber based on a 3×1 photonic lantern

作　　者：丁联创 胡延阳 陆瑶 张汉伟[1,2,3] 周琼 张江彬 姜宗福[1,2,3] 刘文广[1,2,3] DING Lianchuang;HU Yanyang;LU Yao;ZHANG Hanwei;ZHOU Qiong;ZHANG Jiangbin;JIANG Zongfu;LIU Wenguang(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha Hunan 410073,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha Hunan 410073,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha Hunan 410073,China;National Key Laboratory of Space Targrt Awareness,Space Engineering University,Beijing 101406,China)

机构地区：[1]国防科技大学前沿交叉学科学院,湖南长沙410073 [2]国防科技大学南湖之光实验室,湖南长沙410073 [3]国防科技大学高能激光技术湖南省重点实验室,湖南长沙410073 [4]航天工程大学空间目标感知全国重点实验室,北京101416

出　　处：《航天工程大学学报》2025年第1期30-36,共7页

基　　金：国家自然科学基金资助项目(12074432,62405378)。

摘　　要：光子灯笼是一种可实现模式控制功能的相干合束器。结合自适应控制技术,基于光子灯笼的光纤激光器有望解决大模场光纤激光器功率提升中的光束质量控制难题。本文讨论了光子灯笼的设计准则、传输矩阵,利用光束传播法分析了光子灯笼光场传播的演化特性。进行了系统算法控制参数的建模,比较了模式分解法和小孔探测法作为评价函数的控制效果,两者在控制速率和效果上均可行。实验平台验证了小孔探测方案的闭环控制效果,光斑的基模占比大于95%。The photon lantern is a coherent beam combiner capable achieving mode control.By integrating adaptive control technology,fiber lasers based on photon lanterns promise for addressing beam quality control challenges in the power scaling of large-mode-area fiber lasers.This paper discusses design principles and transmission matrix representation of the photon lantern.The beam propagation method(BPM)is employed to analyze the evolution characteristics of optical field propagation within the photon lantern.A system algorithm is modeled for control parameters,and the control performance of the model decomposition method and pinhole detection method is compared for control rate and effectiveness.Experimental validation of the pinhole detection scheme demonstrated effective closed-loop control,achieving a fundamental mode content exceeding 95%in the output beam.

关 键 词：光纤激光器 光子灯笼 模式控制 

分 类 号：TN242[电子电信—物理电子学]