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Speckle-pattern rotation in a few-mode optical fiber in a longitudinal magnetic field |
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| Authors: | L I Ardasheva N D Kundikova M O Sadykova N R Sadykov V E Chernyakov |
| Institution: | (1) Zababakhin All-Russia Research Institute of Technical Physics, Russian Federal Nuclear Center, Snezhinsk, Chelyabinsk oblast, 454070, Russia;(2) Department of Nonlinear Optics, Institute of Electrophysics, Ural Division, Russian Academy of Sciences, Chelyabinsk, Russia |
| Abstract: | The process of rotation of a speckle pattern at the output of a few-mode optical fiber in a longitudinal magnetic field is mathematically modeled. It is shown that the deviation from a linear relation between the rotation angle of a speckle pattern at the output of a few-mode fiber and the fiber length in the presence of a longitudinal magnetic field results from a specific dependence of polarization corrections to the propagation constants of TE and TM modes. The calculation results are compared with the results of an experiment on determining the rotation angle of a speckle pattern as a function of magnetic field in a fiber of constant length. |
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