• High Power Laser Science and Engineering
  • Vol. 10, Issue 5, 05000e29 (2022)
Renyu Feng1、2, Junyu Qian1、2, Yujie Peng1, Yanyan Li1, Wenkai Li1, Yuxin Leng1、*, and Ruxin Li1、3
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
  • 3School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
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    DOI: 10.1017/hpl.2022.20 Cite this Article Set citation alerts
    Renyu Feng, Junyu Qian, Yujie Peng, Yanyan Li, Wenkai Li, Yuxin Leng, Ruxin Li. Femtosecond infrared optical vortex lasers based on optical parametric amplification[J]. High Power Laser Science and Engineering, 2022, 10(5): 05000e29 Copy Citation Text show less

    Abstract

    Infrared femtosecond optical vortices open up many new research fields, such as optical micro–nano manipulation, time-resolved nonlocal spectroscopy in solids, vortex secondary radiation and particle generations. In this article, we demonstrate a femtosecond optical vortex laser system based on a two-stage optical parametric amplifier. In our experiment, 1.45 μm vortex signal pulses with energy of 190 μJ and 1.8 μm vortex idler pulses with energy of 158 μJ have been obtained, and the pulse durations are 51 and 48 fs, respectively. Both the energy fluctuations of the signal and idler pulses are less than 0.5% (root mean square), and the spectral fluctuations are less than 1.5% within 1 hour. This type of highly stable femtosecond optical vortex laser has a wide range of applications for vortex strong-field physics.
    $$\begin{align}{l}_{\mathrm{p}}={l}_{\mathrm{s}}+{l}_{\mathrm{i}}.\end{align}$$ ((1))

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    Renyu Feng, Junyu Qian, Yujie Peng, Yanyan Li, Wenkai Li, Yuxin Leng, Ruxin Li. Femtosecond infrared optical vortex lasers based on optical parametric amplification[J]. High Power Laser Science and Engineering, 2022, 10(5): 05000e29
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