• Chinese Optics Letters
  • Vol. 15, Issue 3, 030008 (2017)
Xiaoqiang Zhang, Ruishan Chen, Yong Zhou, Hai Ming, and Anting Wang*
Author Affiliations
  • Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China
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    DOI: 10.3788/COL201715.030008 Cite this Article Set citation alerts
    Xiaoqiang Zhang, Ruishan Chen, Yong Zhou, Hai Ming, Anting Wang, "Mode selective coupler for optical vortices generation (Invited Paper)," Chin. Opt. Lett. 15, 030008 (2017) Copy Citation Text show less
    Cross section of an MSC. Fiber 1 is an MMF, fiber 2 is an SMF, and they have the same cladding. The distance between them is d.
    Fig. 1. Cross section of an MSC. Fiber 1 is an MMF, fiber 2 is an SMF, and they have the same cladding. The distance between them is d.
    Effective refractive indices of the modes in a fiber. The dashed line is phase matched between different modes at neff=1.449. The wavelength, and the indices of the core and the cladding are 1.55 μm, nco=1.4546, and ncl=1.4446, respectively, and the core radius of fiber 1 and fiber 2 are 12 and 3 μm, respectively.
    Fig. 2. Effective refractive indices of the modes in a fiber. The dashed line is phase matched between different modes at neff=1.449. The wavelength, and the indices of the core and the cladding are 1.55 μm, nco=1.4546, and ncl=1.4446, respectively, and the core radius of fiber 1 and fiber 2 are 12 and 3 μm, respectively.
    Relative coupling coefficient between fiber 1 and fiber 2 as a function of the azimuthal angle α in an MMF.
    Fig. 3. Relative coupling coefficient between fiber 1 and fiber 2 as a function of the azimuthal angle α in an MMF.
    Cross section of the three-core MSC; fiber 2 and fiber 3 are SMFs, and fiber 1 is an MMF. θ is the angle between fiber 2 and fiber 3.
    Fig. 4. Cross section of the three-core MSC; fiber 2 and fiber 3 are SMFs, and fiber 1 is an MMF. θ is the angle between fiber 2 and fiber 3.
    (a) Normalized coupled power between fiber 2 (LP01 mode) and fiber 1 (LP11s mode); (b) normalized coupled power between fiber 3 (LP01 mode) and fiber 1 (LP11c mode). P2 and P3 are incident powers in fiber 2 and fiber 3, and P1 is the coupled power in fiber 1. zc=1.51 cm.
    Fig. 5. (a) Normalized coupled power between fiber 2 (LP01 mode) and fiber 1 (LP11s mode); (b) normalized coupled power between fiber 3 (LP01 mode) and fiber 1 (LP11c mode). P2 and P3 are incident powers in fiber 2 and fiber 3, and P1 is the coupled power in fiber 1. zc=1.51cm.
    (a) Normalized coupled power between fiber 2 (LP01 mode) and fiber 1 (LP31s mode); (b) normalized coupled power between fiber 3 (LP01 mode) and fiber 1 (LP31c mode); (c) the intensity generated in fiber 1 and the phase profiles of the coupled mode in fiber 1 with topological charge equal to three. P2 and P3 are incident powers in fiber 2 and fiber 3, and P1 is the coupled power in fiber 1. zc=4.92 cm.
    Fig. 6. (a) Normalized coupled power between fiber 2 (LP01 mode) and fiber 1 (LP31s mode); (b) normalized coupled power between fiber 3 (LP01 mode) and fiber 1 (LP31c mode); (c) the intensity generated in fiber 1 and the phase profiles of the coupled mode in fiber 1 with topological charge equal to three. P2 and P3 are incident powers in fiber 2 and fiber 3, and P1 is the coupled power in fiber 1. zc=4.92cm.
    Phase Difference ϕ0Coupled mode in Fiber 1Phase Profile
    0
    π/2
    π/2
    Table 1. Mode Patterns Formed in Fiber 1 by Various Phase Differences of Input Modes in SMFs
    Xiaoqiang Zhang, Ruishan Chen, Yong Zhou, Hai Ming, Anting Wang, "Mode selective coupler for optical vortices generation (Invited Paper)," Chin. Opt. Lett. 15, 030008 (2017)
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