中国科学院大学学报2021，Vol.38Issue(4)：450-458,9.DOI:10.7523/j.issn.2095-6134.2021.04.003
飞秒涡旋光与产生的3次谐波在空气中的耦合传输
Co-propagation of femtosecond vortex beam and the generated third harmonic in air
摘要
Abstract
The third harmonic (TH) vortex generated by the filamentation of femtosecond vortex beam in air is simulated.The influences of perturbation distribution and peak power of the initial fundamental wave (FW) on the evolution of the two-color vortex are investigated.For the initial FW with symmetrical perturbation,the intensity annulus of the two-color vortex is not influenced by the initial peak power and can be kept in the filamentation regime.But the spiral phase distribution is influenced by multiple filamentation under the high peak power condition.In this case,the spiral phase distribution of the two-color vortex is destroyed due to the phase accumulation of the multiple filaments.For the initial FW with asymmetrical perturbation,both the spatial annulus and the spiral phase distribution of the two-color vortex are destroyed when multiple filaments are formed.关键词
成丝/3次谐波/飞秒涡旋光/空气/扰动/峰值功率Key words
filamentation/third harmonic/femtosecond vortex beam/air/perturbation/peak power分类
数理科学引用本文复制引用
展林弟,钟志萍,徐立桐,奚婷婷,郝作强..飞秒涡旋光与产生的3次谐波在空气中的耦合传输[J].中国科学院大学学报,2021,38(4):450-458,9.基金项目
Supported by National Natural Science Foundation of China (NSFC)(11874056,11774038,11474039),Youth Innovation Promotion Association of Chinese Academy of Sciences (2014143),and Taishan Scholar Project of Shandong Province （NSFC）
