• Infrared and Laser Engineering
  • Vol. 49, Issue 12, 20201061 (2020)
Sha Wang1, Zhicheng Zhang1, Guoliang Deng1、*, and Shouhuan Zhou2
Author Affiliations
  • 1College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
  • 2College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
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    DOI: 10.3788/IRLA20201061 Cite this Article
    Sha Wang, Zhicheng Zhang, Guoliang Deng, Shouhuan Zhou. Research progress on direct generation of ultrashort pulse OAM vortex beams (Invited)[J]. Infrared and Laser Engineering, 2020, 49(12): 20201061 Copy Citation Text show less

    Abstract

    Orbital angular momentum (OAM) vortex beam has a phase singularity with a twisted wave-front, whose complex amplitude comprises the helical term exp (ilθ). OAM vortex beam has been widely used in optical manipulation, imaging, optical communication, sensing and so on. Ultra-short pulse OAM vortex beams have the advantages of both vortex beams and ultra-short pulses, and can be applied to chiral material processing, long distance transmission, strong field physics and nonlinear frequency conversion. Direct generation of ultra-short OAM vortex beams has the advantages of compact and simple system and good beam quality. The research progress on direct generation of ultra-short OAM vortex beams was summarized. At present, the pulse width of the ultra-short OAM vortex beam generated by the active method is still limited to a few hundred femtoseconds. How to obtain the pulsed vortex beam output within 100 femtoseconds or even with a few cycles through the direct output method will be an important future development direction.
    Sha Wang, Zhicheng Zhang, Guoliang Deng, Shouhuan Zhou. Research progress on direct generation of ultrashort pulse OAM vortex beams (Invited)[J]. Infrared and Laser Engineering, 2020, 49(12): 20201061
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