27 April 2016 Self-steepening and intrapulse Raman scattering for supercontinuum generation in optimized photonic crystal fiber at 1.3 μm
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Abstract
In this work, we design a highly nonlinear noncircular core photonic crystal fiber (HNL-PCF) for the generation of a supercontinuum (SC) at 1.3 μm having minimum anomalous dispersion and using many nonlinear effects by introducing self-phase modulation (SPM), self-steepening and Raman effects. The proposed geometry of the HNL-PCF is composed of six rings of air-holes and silica as a background material for the core. Using the vectorial Finite Element method (FEM) with a perfectly matched layer (PML), the proposed HNL-PCF is numerically modeled for determining its characteristics as Group Velocity Dispersion (GVD) and nonlinear properties. After optimizing the properties of the proposed HNL-PCF (GVD= - 0.95 ps2/km; γ= 55.45 [W.km]-1 around 1.3 μm), the SC is generated by solving the nonlinear Schrodinger equation (NLSE), that contains different parameters of the cited nonlinear effects, with split-step Fourier method (SSFM). The introducing of this different effects in our work allows to generate a SC of spectral bandwidth SBW=260 nm at 1,3 μm using only 1.89 mm long of PCF.
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Mohamed Lamine Ferhat, Mohamed Lamine Ferhat, Lynda Cherbi, Lynda Cherbi, "Self-steepening and intrapulse Raman scattering for supercontinuum generation in optimized photonic crystal fiber at 1.3 μm", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860C (27 April 2016); doi: 10.1117/12.2228591; https://doi.org/10.1117/12.2228591
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