Laser shaping and optical power limiting of pulsed Laguerre–Gaussian laser beams of high-order radial modes in fullerene C60  

作　　者：李杰 管文慧 袁烁 赵亚男 孙玉萍 刘纪彩 Jie Li;Wen-Hui Guan;Shuo Yuan;Ya-Nan Zhao;Yu-Ping Sun;Ji-Cai Liu(Department of Mathematics and Physics,North China Electric Power University,Beijing 102206,China;School of Physics and Optoelectronic Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]Department of Mathematics and Physics,North China Electric Power University,Beijing 102206,China [2]School of Physics and Optoelectronic Engineering,Shandong University of Technology,Zibo 255049,China

出　　处：《Chinese Physics B》2023年第2期273-280,共8页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11974108 and 11574082);Fundamental Research Funds for the Central Universities (Grant No. 2021MS046);the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019MA020)。

摘　　要：We study the strong nonlinear optical dynamics of nanosecond pulsed Laguerre–Gaussian laser beams of high-order radial modes with zero orbital angular momentum propagating in the fullerene C60molecular medium. It is found that the spatiotemporal profile of the incident pulsed Laguerre–Gaussian laser beam is strongly reshaped during its propagation in the C60molecular medium. The centrosymmetric temporal profile of the incident pulse gradually evolves into a noncentrosymmetric meniscus shape, and the on-axis pulse duration is clearly depressed. Furthermore, the field intensity is distinctly attenuated due to the field-intensity-dependent reverse saturable absorption, and clear optical power limiting behavior is observed for different orders of the input pulsed Laguerre–Gaussian laser beams before the takeover of the saturation effect;the lower the order of the Laguerre–Gaussian beam, the lower the energy transmittance.

关 键 词：pulsed Laguerre–Gaussian laser beams high-order radial mode optical power limiting reverse saturable absorption 

分 类 号：O437[机械工程—光学工程]