Li Haoyu, Dong Yongkang, Xu Pengbai, Qi Yue, Guo Changliang, Sheridan John T
Opt Lett. 2015 Jul 1;40(13):2981-4. doi: 10.1364/OL.40.002981.
A novel method for multimode fiber (MMF) laser-beam cleanup is introduced based on the optically induced growth and interaction of self-written waveguides (SWWs) in a photopolymer material. Theoretically, it is predicted that when the light is introduced into a free-radical photopolymerizable system from a MMF, the incident multichannel and structured beam shape can be caused to merge to form a single-channel Gaussian-like beam under specific exposure and material conditions. Experimental validation was carried out using a dry acrylamide/polyvinyl alcohol (AA/PVA) photopolymer sample. This work opens the door to studies involving self-developing laser beam cleanup and also to possible applications in photonic telecommunication systems and integrated optical devices.
介绍了一种基于光致聚合物材料中自写入波导（SWWs）的光诱导生长和相互作用的多模光纤（MMF）激光束净化新方法。从理论上预测，当光从多模光纤引入自由基光聚合体系时，在特定的曝光和材料条件下，入射的多通道和结构化光束形状可合并形成单通道类高斯光束。使用干燥的丙烯酰胺/聚乙烯醇（AA/PVA）光聚合物样品进行了实验验证。这项工作为涉及自显影激光束净化的研究以及光子电信系统和集成光学器件中的可能应用打开了大门。
