Simulation of vortex laser beams propagation in parabolic index media based on fractional Fourier transform

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Mossoulina, O.A.^1 ; Kirilenko, M.S.^1,2 ; Khonina, S.N.^1,2

Samara National Research University, Moskovskoye Shosse, 34, Samara

443086, Russia^1

Image Processing Systems Institute, Russian Academy of Sciences, Molodogvardeyskaya, 151, Samara

443001, Russia^2

关键词: Fiber parameters;    Fractional Fourier transforms;    Numerical results;    Parabolic dependence;    Parabolic optical fibers;    Transverse beams;    Transverse distribution;    Vortex laser beams;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012142/pdf
DOI  :  10.1088/1742-6596/741/1/012142

来源: IOP

【 摘 要 】

We use radial Fractional Fourier transform to model vortex laser beams propagation in optical waveguides with parabolic dependence of the refractive index. To overcome calculation difficulties at distances proportional to a quarter of the period we use varied calculation step. Numerical results for vortex modes superposition propagation in a parabolic optical fiber show that the transverse beam structure can be changed significantly during the propagation. To provide stable transverse distribution input scale modes should be in accordance with fiber parameters.