The main limiting factor of a high-power and high-bit-rate device performance is the onset of nonlinear effects which includes stimulated Raman scattering (SRS), stimulated Brillouin scattering (SBS), four-wave mixing (FWM), and self-phase modulation (SPM). The solution to these limiting factors is large-mode-area (LMA) fiber. In this paper, asymmetric, triangular, and rectangular core LMA designs are compared and analyzed in terms of confinement loss, effective mode area, dispersion, and mode field diameter (MFD). The structural parameter and mode details were analyzed using the commercially available RSoft full vectorial finite element method (FemSIM™) from Synopsys.
Nonlinear effects LMA Fiber modes Effective mode area Confinement loss Mode field diameter
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