Revolving and spinning of optical patterns by two coaxial spiraling elliptic beams in nonlocal nonlinear media

Liang, Guo ✉

English Scientific Article (Journal Article)
Published: OPTICS EXPRESS 1094-4087 27 (10) pp. 14667-14674 2019
  • SJR Scopus - Atomic and Molecular Physics, and Optics: Q1
    Rotating patterns can be produced by two coaxial spiraling elliptic beams nonlocal nonlinear media. The two constituent beams carry the orbital angular momentum (OAM), which has the same or opposite signs. The resultant patterns exhibit revolving and spinning rotations similar to the Sun-Earth system. The revolving-typed rotation comes of the overall OAM, while the spinning-typed rotation results from the respective OAM of the constituent beam. A kind of soliton patterns can stably exist, for which a vortex is nested centrally in the rotating square-shaped optical envelope and four peaks appear at four corners. The centrally nested vortex splits into two single vortex for r not equal 1, with r being the power ratio between the two constituent beams. The two single vortexes align vertically for r < 1 and horizontally for r > 1, and their spacing increases with vertical bar r - 1 vertical bar. The theoretical results give a possibility of the transforming from cross-phase-typed OAM into the helical-phase-typed OAM, which may find potential applications in beam shaping and controlling. In addition, the square optical envelope may exhibit advantages in the integration of optical components. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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    2020-09-29 15:48