Fractional orbital angular momentum of a Gaussian beam with an embedded off-axis optical vortex

被引：8
|
作者：
Kotlyar V.V. [1 ,2 ]
Kovalev A.A. [1 ,2 ]
Porfirev A.P. [1 ,2 ]
Abramochkin E.G. [3 ]
机构：
[1] Image Processing Systems Institute оf RAS, Branch of the FSRC “Crystallography and Photonics” RAS, Samara
[2] Samara National Research University, Samara
[3] Samara Branch of P.N. Lebedev Physical Institute of Russian Academy of Sciences, Samara
来源：
| 1600年 / Institution of Russian Academy of Sciences卷 / 41期
关键词：
Fractional orbital angular momentum; Gaussian beam; Optical vortex; Spiral phase plate;
D O I：
10.18287/2412-6179-2017-41-1-22-29
中图分类号：
学科分类号：
摘要：
We theoretically and experimentally study asymmetric Gaussian optical vortices generated via diffracting a Gaussian beam by an off-axis spiral phase plate or amplitude "fork" hologram. It is shown that depending on the magnitude of the off-axis shift the laser beam can acquire a crescent-shaped cross-section, which rotates on propagation. We obtain an analytical expression for the orbital angular momentum (OAM) of such a beam, which appears to be fractional. We show that with increasing off-axis shift, the OAM decreases parabolically. The experimental results are in qualitative agreement with theory and numerical simulation. © 2017, Institution of Russian Academy of Sciences. All rights reserved.
引用
收藏
页码：22 / 29
页数：7
相关论文
共 50 条
  • [31] Phase Off-Axis Modulation Metasurface for Orbital Angular Momentum Mode Multiplexing/Demultiplexing
    Xie, Zhiqiang
    He, Yanliang
    Wang, Xinrou
    Wu, Haisheng
    Li, Canming
    Ye, Huapeng
    Liu, Junmin
    Li, Ying
    Yang, Yatao
    Fan, Dianyuan
    Chen, Shuqing
    JOURNAL OF LIGHTWAVE TECHNOLOGY, 2023, 41 (02) : 540 - 546
  • [32] Off-Axis and Multi Optical Bottles from the Ring Airy Gaussian Vortex Beam with the Astigmatic Phase
    Wu, You
    Lin, Zejia
    Xu, Chuangjie
    Fu, Xinming
    Chen, Kaihui
    Qiu, Huixin
    Deng, Dongmei
    ANNALEN DER PHYSIK, 2020, 532 (07)
  • [33] Orbital angular momentum and rotational properties of off-axis vortex beams in two-dimensional media with anisotropic nonlocal nonlinearity
    Liang, Guo
    Chen, Xiangwei
    Xu, Huizhong
    OPTICS LETTERS, 2024, 49 (17) : 4871 - 4874
  • [34] Transversal optical vortex in the interference field of two off-axis Gaussian beams
    Wang Li
    Wang Qing-Feng
    Wang Xi-Qing
    Lu Bai-Da
    ACTA PHYSICA SINICA, 2007, 56 (01) : 201 - 207
  • [35] Transversal optical vortex in the interference field of two off-axis Gaussian beams
    Wang, Li
    Wang, Qing-Feng
    Wang, Xi-Qing
    Lu, Bai-Da
    Wuli Xuebao/Acta Physica Sinica, 2007, 56 (01): : 201 - 207
  • [36] Orbital angular momentum and topological charge of a Gaussian beam with multiple optical vortices
    Kovalev, A. A.
    Kotlyar, V. V.
    Kalinkina, D. S.
    COMPUTER OPTICS, 2020, 44 (01) : 34 - 39
  • [37] Optical fiber with fractional orbital angular momentum
    Albert, Matthew
    Chen, Liang
    OPTICS EXPRESS, 2023, 31 (01) : 564 - 571
  • [38] Perfect Off-Axis Optical Vortex Lattice
    Tai, Yuping
    Qin, Xueyun
    Li, Chenying
    Wei, Wenjun
    Zhang, Hao
    Li, Xinzhong
    PHOTONICS, 2024, 11 (08)
  • [39] Recognition of Orbital Angular Momentum of Fractional Perfect Optical Vortex Beam Based on Convolutional Neural Network and Multiaperture Interferometer
    Du Haobo
    Chen Jun
    Fu Gangkun
    Li Yansong
    Wang Hailong
    Shi Yan
    Zhao Chunliu
    Jin Shangzhong
    ACTA OPTICA SINICA, 2023, 43 (04)
  • [40] Manifestation of the rotational Doppler effect by use of an off-axis optical vortex beam
    Basistiy, IV
    Slyusar, VV
    Soskin, MS
    Vasnetsov, MV
    Bekshaev, AY
    OPTICS LETTERS, 2003, 28 (14) : 1185 - 1187
12345