Revival effect in optical waveguides

N. I. Petrov

doi:10.1117/12.2317910

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6 June 2018 Revival effect in optical waveguides

N. I. Petrov

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Proceedings Volume 10774, Optical Technologies in Telecommunications 2017; 107740I (2018) https://doi.org/10.1117/12.2317910
Event: XV International Scientific and Technical Conference on Optical Technologies in Telecommunications, 2017, Kazan, Russian Federation

Abstract

Propagation of strongly focused light beams in graded-index planar waveguide and cylindrical fiber is investigated using exact analytical solutions of the wave equation. It is shown that high efficiency transfer of a strongly focused subwavelength spot through optical waveguide over large distances takes place with a period of revival (regeneration). Intensity distributions of a focused light beam and focusing efficiency are simulated. Super-oscillatory hot-spots with the sizes which are beyond the conventional Abbe diffraction limit can be observed at large distances from the source. This can provide the possibility to detect optical super-resolution information in the far-field without any evanescent waves. Far-field super-resolution imaging capabilities of a graded-index waveguide are also analyzed. It is shown that the vector-vortex Laguerre-Gauss modes with polarization-orbital angular momentum (OAM) entanglement are the vector solutions of the Maxwell equations in a graded-index cylindrical waveguide. The wave shape variation with distance taking into account the spin-orbit interaction and nonparaxial effects is analyzed. Effect of long-term periodical revival of wave packets due to mode interference in a graded-index cylindrical optical waveguide is also demonstrated.

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N. I. Petrov "Revival effect in optical waveguides", Proc. SPIE 10774, Optical Technologies in Telecommunications 2017, 107740I (6 June 2018); https://doi.org/10.1117/12.2317910

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