Photonics Research, Volume. 8, Issue 8, 1375(2020)

High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity

Shuiqin Zheng1,2,3, Zhenkuan Chen1,3, Qinggang Lin1, Yi Cai1, Xiaowei Lu1, Yanxia Gao1,4, Shixiang Xu1、*, and Dianyuan Fan3
Author Affiliations
  • 1Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Physics and Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China
  • 2Photonics Laboratory, Division of Computer, Electrical, and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
  • 3SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
  • 4e-mail: gyx@szu.edu.cn
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    Figures & Tables(8)
    Evolution of an optical vortex seed with l=1 in a conventional RA and the amplification number kn=4n−3.
    Setup of the proposed RA. QW, quarter-wave plate; QP, Q-plate; OC, optical coupling system; M, plane mirror; CM, concave mirror, R=−1 m; PM, fold mirror, R=0.9 m; PC, Pock cell; BE, beam expander; P, polarizer; PL, pump lens, f=30 cm; CA, convex axicon, base angle of 0.5°; Ti:S, Ti:sapphire, length of 25.4 mm.
    Simulations of laser oscillations from noises with the different ring-shaped pump radii. Expansion ratios are (a) 4, (b) 3.5, and (c) 3.
    Simulation of vortex amplification with different seed energies.
    (a) Ring-shaped pump on one of the Ti:S surfaces, (b) the donut-shaped output from the unseeded RA, (c) the phase structure of our Dammann vortex grating, (d) the corresponding far-field with parallel illumination, and (e) the measured far-field illuminated by the output of the unseeded RA.
    Recorded spatial intensities of the seed with l=1: (a) the seed focused by a cylindrical lens, (b) the output spatial intensity distribution, and (c) the far-field distribution after Dammann vortex grating.
    Recorded spatial intensities of the seed with l=−1: (a) the seed focused by a cylindrical lens, (b) the output spatial intensity distribution, and (c) the far-field distribution after Dammann vortex grating.
    (a) Spatial cross-section intensity of the amplified LG0,1 vortex: the average from the different orientations (black line) and theoretical fitting (dashed red line); (b) the spectral intensity and phase of the amplified LG0,1 pulse; (c) the temporal intensity and phase of the amplified LG0,1 pulse (black and blue lines) and the temporal intensity of corresponding Fourier-transform-limited pulse (red line).
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    Shuiqin Zheng, Zhenkuan Chen, Qinggang Lin, Yi Cai, Xiaowei Lu, Yanxia Gao, Shixiang Xu, Dianyuan Fan, "High-gain amplification for femtosecond optical vortex with mode-control regenerative cavity," Photonics Res. 8, 1375 (2020)

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    Paper Information

    Category: Ultrafast Optics

    Received: Feb. 24, 2020

    Accepted: Jun. 19, 2020

    Published Online: Jul. 24, 2020

    The Author Email: Shixiang Xu (shxxu@szu.edu.cn)

    DOI:10.1364/PRJ.390963

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