Dispersion management in photonic crystal fibers to achieve super continuum generation at Mid-IR
Paper ID : 1186-ICNS
Authors:
Seyed Ali Seyed Hashemi1, Mina Noori *2
1Sahand university of Technology
2Department of Electrical Engineering, Sahand University of Technology
Abstract:
In this study, a double clad hexagonal photonic crystal fiber has been investigated to achieve a highly nonlinear media with desired dispersion characteristics to obtain broadband coherent super continuum generation at Mid-IR frequency range. The proposed photonic crystal fiber is comprised of AsSe2 which is highly nonlinear and transparent at wavelengths up to 17.5µm. By manipulation of holes’ radii in the first and the second cladding, almost flat dispersion has been obtained. The dispersion property is highly affected by the structural parameters. The structure presents a graded profile in the first clad, however the air holes are uniformly arranged in the second cladding. By considering fabrication challenges in this study, the lattice constant of 1µm has been regarded for the proposed photonic crystal fiber which assists to obtain high nonlinearity and small effective area of 390 W-1km-1 and 14.46µm2, respectively for the pump pulse at λ=12µm which are desirable for super continuum generation. The study has been conducted by modal analysis to tailor the nonlinear and dispersion properties of the presented photonic crystal fiber. Super continuum generation is applicable in variety of applications including spectroscopy, microscopy, and tomography.
Keywords:
Super continuum generation; Generalize nonlinear Schrödinger equation; Photonic crystal fiber, Nonlinear applications.
Status : Abstract Accepted (Poster Presentation)