Chinese Optics Letters, Volume. 21, Issue 10, 101401(2023)

Controlled generation of order-switchable cylindrical vector beams from a Nd:YAG laser

Longyang Cao1, Mingming Zhang1, Jiantai Dou1, Jiang Zhao2, Youyou Hu1、*, and Bo Li3、**
Author Affiliations
  • 1Department of Optoelectronic Information of Science and Engineering, School of Science, Jiangsu University of Science and Technology, Zhenjiang 212100, China
  • 2Key Laboratory of Ferro and Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, China
  • 3School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
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    Figures & Tables(8)
    Solid-state laser for the generation of mode-switchable high-order CVB. L1, collimating lens; L2, L3, focus lenses; M, input mirror (HT@808 nm, HR@1064 nm); Nd:YAG, laser crystal; PBS, polarizing beam splitter; HWP, half-wave plate; VWP1 & VWP2: vortex wave plates; QWP1 & QWP2: quarter-wave plates; OC, output coupling mirror; P, polarizer; BQP, beam quality profiler.
    Profile and polarization states of a tunable high-order CVB generated by a microchip laser which goes through a round-trip path in the cavity. M, input mirror; PBS, polarizing beam splitter; HWP, half-wave plate; VWP1&VWP2, q-plates of order m = 1; QWP1 and QWP2, quarter-wave plates; OC, output coupling mirror.
    (a1)–(d1) Intensity distributions of the second-order CVBs generated using the group of first-order VWPs and intensity distributions after passing through a linear polarizer oriented at different angles of (a2)–(d2) 0; (a3)–(d3) π/4; (a4)–(d4) π/2.
    Stokes parameters and polarization azimuth of the second-order CVBs. (a1)–(d1) S1, (a2)–(d2) S2, (a3)–(d3) S3, (a4)–(d4) PA.
    Intensity distributions of the Gaussian beam and the second-order CVB are generated (a1)–(a3) in the cavity and (b1)–(b3) outside the cavity, respectively, using the group of first-order VWPs; intensity distributions after passing through the linear polarizer placed at 0 (a4)–(a6) inside and (b4)–(b6) outside the cavity.
    (a) Output spectra. (b) Output power and pump power curves (the red is the Gaussian beam without VWP; the black and the blue are the Gaussian beam and second-order CVB with VWP).
    (a1)–(d1) Intensity distributions of the second- and fourth-order CVBs are generated using the group of first- and third-order VWPs; (a2)–(d2) measured intensity distributions after passing through a linear polarizer oriented at 0.
    (a1)–(h1) Intensity distributions of high-order CVBs are generated by different orders and numbers of VWP combinations inside the cavity; (a2)–(h2) measured intensity distributions after passing through a linear polarizer oriented at different angles of 0.
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    Longyang Cao, Mingming Zhang, Jiantai Dou, Jiang Zhao, Youyou Hu, Bo Li. Controlled generation of order-switchable cylindrical vector beams from a Nd:YAG laser[J]. Chinese Optics Letters, 2023, 21(10): 101401

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    Paper Information

    Category: Lasers, Optical Amplifiers, and Laser Optics

    Received: Dec. 26, 2022

    Accepted: May. 5, 2023

    Posted: May. 8, 2023

    Published Online: Aug. 28, 2023

    The Author Email: Youyou Hu (yyhu@just.edu.cn), Bo Li (libohust@hust.edu.cn)

    DOI:10.3788/COL202321.101401

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