Science Bulletin ( IF 18.8 ) Pub Date : 2018-10-10 , DOI: 10.1016/j.scib.2018.10.004 Xiaorui Wang 1 , Honggang Ye 2 , Zhicheng Su 3 , Dapeng Yu 4 , Shijie Xu 3
|
By “seeing” the green two-photon luminescence, two separate focusing points are observed on the propagation axis of a converging femtosecond laser beam in a ZnO single crystal rod. It is found that the self-focusing effect makes a significant contribution to the formation of the first focusing point, while the second focusing point is caused by self-refocusing. The position of the first focusing point is in good agreement with the value predicted by a model developed by Chin and his co-workers. These experimental findings could be the unprecedented evidence for the self-focusing and refocusing effect of the femtosecond laser filament propagation in nonlinear media.
中文翻译：
双光子发光法观察飞秒激光在 ZnO 晶体中的二次自聚焦
通过“看到”绿色双光子发光，在 ZnO 单晶棒中会聚的飞秒激光束的传播轴上观察到两个独立的聚焦点。发现自聚焦效应对第一个聚焦点的形成有显着贡献，而第二个聚焦点是由自聚焦引起的。第一个焦点的位置与 Chin 及其同事开发的模型预测的值非常吻合。这些实验结果可能是飞秒激光灯丝在非线性介质中传播的自聚焦和重聚焦效应的前所未有的证据。
京公网安备 11010802027423号