摘要
Femtosecond(fs)cylindrical vector beams(CVBs)have found use in many applications in recent years.However,the existing rigid generation methods seriously limit its development.Here,we propose a flexible method for generating fs-CVBs with arbitrary polarization order by employing half wave plates and vortex retarders.The polarization state,autocorrelation width,pulse width,and spectrum features of the input and generated CVB pulses are measured and compared.The results verify that the generated CVBs remain in the fs regime with no appreciable temporal distortion,and the energy conversion efficiency can reach as high as 96.5%,even for a third-order beam.As a flexible way to generate fs-CVBs,this method will have great significance for many applications.
Femtosecond （fs） cylindrical vector beams （CVBs） have found use in many applications in recent years. However, the existing rigid generation methods seriously limit its development. Here, we propose a flexible method for generating fs-CVBs with arbitrary polarization order by employing half wave plates and vortex retarders. The polarization state, autocorrelation width, pulse width, and spectrum features of the input and generated CVB pulses are measured and compared. The results verify that the generated CVBs remain in the fs regime with no appreciable temporal distortion, and the energy conversion efficiency can reach as high as 96.5%, even for a third-order beam. As a flexible way to generate fs-CVBs, this method will have great significance for many applications.
基金
supported by the National Natural Science Foundation of China(Nos. 61138003, 61427819, 61422506, 61605117, and 61605142)
the Science and Technology Innovation Commission of Shenzhen(Nos. KQCS2015032416183980, KQCS201532416183981, and JCYJ20140418091413543)
the start-up funding at Shenzhen University
support given by the Leading Talents of Guangdong Province Program(No. 00201505)
the Natural Science Foundation of Guangdong Province(No. 2016A030312010)
support of Natural Science Foundation of Guangdong Province(No. 2016A030310063)
the Project 2016032 supported by the SZU R/D Fund
the Open Fund of the Key Laboratory of Optical Information Science & Technology(Nankai University)
