Generation of ultrafast radially polarized pulses through chirp-assisted femtosecond optical parametric amplification

作     者：SaiSai Hu JieFeng Huang XinHao Ren ChangWen Xu ShiXiang Xu DianYuan Fan HaiZhe Zhong SaiSai Hu;JieFeng Huang;XinHao Ren;ChangWen Xu;ShiXiang Xu;Dian Yuan Fan;HaiZhe Zhong

作者机构：International Collaborative Laboratory of 2D Materials for Optoelectronic Science&Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2022年第65卷第5期

页      面：51-57页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.92050203) the Natural Science Foundation of Guangdong Province(Grant No.2020A1515010541) the Science and Technology Project of Shenzhen(Grant Nos.JCYJ20200109105606426,JCYJ20190808143419622,and JCYJ20190808145016980) 

主　　题：radially polarized beam optical parametric amplifier ultrafast lasers spectral broadening optical parametric phase 

摘      要：Radially polarized beams characterized by an axially symmetric polarization distribution can be sharply focused to produce strong longitudinal fields in the *** applications of these beams will be facilitated by the availability of higher powers and shorter ***,the ultrafast radially polarized pulse is typically generated via wavefront reconstruction from conventional linearly polarized *** pulse duration and intensity limits are strictly dependent on extra-cavity ***,a chirp-assisted near-degenerate type-II parametric process is presented as a pulse-energy-scalable method of accessing ultrafast radially polarized *** a proof-of-principle experiment,the broadband gain balance between the orthogonally polarized signal components was realized via controlling the chirp of the pump *** an analogous pulseduration transfer effect,the radially polarized signal inherited the temporal and spectral characteristics of the pump pulse and maintained the radial polarization state of each frequency component of the *** a shorter pump pulse,the generation of few-cycle radially polarized pulses should be achievable,which may facilitate a wide range of ultrafast applications such as vacuum electron acceleration and high-harmonic generation.