Abstract
In this study, Octagonal Photonic Crystal Fiber (O-PCF) structures are designed for different air filling fractions with fixed pitch length of 2.2 μm. The light propagating characteristics of PCF structures such as effective refractive index, confinement loss, chromatic dispersion mode effective area and nonlinear coefficient are numerically analyzed. The simulation results show that the fibers have dispersion flattened, ultra-low loss highly nonlinear nature in the wavelength region 1.3 μm to 1.7 μm.
Highlights
Photonic Crystal Fibers (PCFs) are a new class of optical waveguides which offer exceptional light guiding mechanism and deliver significantly improved performance compared to conventional optical fibers [1]-[3]
We have proposed a new class of index guided photonic crystal fibers with octagonal arrangement of air holes in the SiO2 host material
The full vector analysis of the fiber structure is done by calculating the propagation of electric vector through the fiber by solving an eigenvalue problem drawn from the Maxwell’s equations using Finite Elemental Method (FEM) [17] in each triangular subspace in the area of the meshed fiber structure and effective refractive index of the PCF is obtained from the simulation result
Summary
Photonic Crystal Fibers (PCFs) are a new class of optical waveguides which offer exceptional light guiding mechanism and deliver significantly improved performance compared to conventional optical fibers [1]-[3]. Custom-made design of various PCF geometries offers PCFs as a potential candidate for manipulating light through optical waveguides to achieve properties like dispersion compensation, low confinement loss, large mode area [4], etc. In PCFs, anomalous dispersion can be achieved with a wavelength at which group velocity dispersion of pure silica and conventional single mode fiber is nominal. This peculiar property can be utilized for the modeling, simulation and demonstration of soliton propagation and super-continuum generation [3]-[7]. The important characteristics of PCF include endlessly single mode operation, high birefringence, and ultrahigh nonlinearity [8]-[10].
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