| 基于空间结构内部锁相的光纤激光相干合成技术 |
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| 引用本文： | 龙金虎,粟荣涛,常洪祥,侯天悦,常琦,蒋敏,张嘉怡,马阎星,马鹏飞,周朴.基于空间结构内部锁相的光纤激光相干合成技术[J].强激光与粒子束,2023,35(4):041008-1-041008-12. |
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| 作者姓名： | 龙金虎 粟荣涛 常洪祥 侯天悦 常琦 蒋敏 张嘉怡 马阎星 马鹏飞 周朴 |
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| 作者单位： | 1.国防科技大学 前沿交叉学科学院，长沙 410073 |
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| 基金项目： | 国家自然科学基金项目(62275272, 62075242); 湖南省自然科学基金创新研究群体项目(2019JJ10005); 长沙市优秀青年创新人才培养计划项目(kq2206003); 湖南省研究生科研创新项目(QL20220013) |
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| 摘 要： | 介绍了本课题组近年来在基于空间结构内部锁相的光纤激光相干合成方面的研究工作,给出了空间结构内部锁相相干合成的基本原理,搭建了七路低功率光纤激光阵列实验系统,结果表明在内部相位噪声校正基础之上,可以稳定补偿外部相位差进而实现激光阵列同相位输出,验证了内部锁相方法的可行性。进一步介绍了空间结构内部锁相技术在目标在回路相干合成、阵列光束光场调控等方面的拓展应用,通过实验论证了空间结构内部锁相技术能够有效提升目标在回路相干合成系统的相位控制带宽,并在远场有效生成轨道角动量光束阵列,其拓扑荷数可从-1到+1切换。
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| 关 键 词： | 光纤激光 相干合成 相位控制 内部锁相 光场调控 |
| 收稿时间： | 2022-08-23 |
Coherent combining of fiber laser based on internal phase locking in spatial structure |
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| Affiliation: | 1.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China2.Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China3.Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | This paper introduces our recent research on the coherently combined fiber laser based on spatial structure internal phase locking including the principle of spatial structure internal phase locking, and the experiment of 7-channel fiber laser array carried out to experimentally verify the feasibility of this technique. The detailed results indicate that when the phase noises in the laser channels are locked, the external phase differences an be compensated together, and the laser array can be locked with a same phase wavefront. In addition, the researches on the CBC of target in the loop (TIL) technique and constructing the light fields are introduced as well. In the experiment, the control bandwidth of the CBC system of TIL could be improved effectively, and the orbital angular momentum beams could be generated in the far field, the topological charge could be changed from ?1 to +1. |
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