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  • Received: Dec. 5, 2019

    Accepted: Jan. 21, 2020

    Posted: Jan. 23, 2020

    Published Online: Feb. 28, 2020

    The Author Email: Yujie Peng (yjpeng@siom.ac.cn), Yuxin Leng (lengyuxin@mail.siom.ac.cn), Ruxin Li (ruxinli@mail.shcnc.ac.cn)

    DOI: 10.1364/PRJ.385190

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    Junyu Qian, Yujie Peng, Yanyan Li, Pengfei Wang, Beijie Shao, Zhe Liu, Yuxin Leng, Ruxin Li. Femtosecond mid-IR optical vortex laser based on optical parametric chirped pulse amplification[J]. Photonics Research, 2020, 8(3): 03000421

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Photonics Research, Vol. 8, Issue 3, 03000421 (2020)

Femtosecond mid-IR optical vortex laser based on optical parametric chirped pulse amplification 

Junyu Qian1,2, Yujie Peng1,3,4,*, Yanyan Li1, Pengfei Wang1,2, Beijie Shao1,2, Zhe Liu1, Yuxin Leng1,3,5,*, and Ruxin Li1,3,6,*

Author Affiliations

  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China
  • 4e-mail: yjpeng@siom.ac.cn
  • 5e-mail: lengyuxin@mail.siom.ac.cn
  • 6e-mail: ruxinli@mail.shcnc.ac.cn

Abstract

A femtosecond mid-infrared optical vortex laser can be used for high harmonic generation to extend cutoff energy to the kilo-electron-volt range with orbital angular momentum, as well as other secondary radiations. For these, we demonstrate a high-energy femtosecond 4 μm optical vortex laser based on optical parametric chirped pulse amplification (OPCPA) for the first time. The optical vortex seed is generated from a femtosecond 4 μm laser by a silicon spiral phase plate with the topological charge l of 1 before the stretcher. Through using a two-stage collinear OPCPA amplifier, the chirped vortex pulse is amplified to 12.4 mJ with 200 nm full width at half-maximum bandwidth. After compression, the vortex laser pulse with 9.53 mJ, 119 fs can be obtained. Furthermore, the vortex characteristics of the laser beam are investigated and evaluated. This demonstration can scale to generate a higher-peak-power vortex mid-IR laser and pave a new way for high field physics.

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