Design and Analysis of non-linear properties of photonic crystal fiber with Various Doping Concentration

Photonic crystal fibers (PCFs) consisting of a central defect region surrounded by multiple air holes that run along the length of the fiber are attracting much attention in recent years because of unique properties which are... [ view full abstract ]

Photonic crystal fibers (PCFs) consisting of a central defect region surrounded by multiple air holes that run along the length of the fiber are attracting much attention in recent years because of unique properties which are not realized in conventional optical fibers[1,2]. In this work, a solid core photonic crystal fiber (PCF) is designed using Comsol Multiphysics software based on finite element method[3,4]. In our analysis the structure introduced is a structure formed by a doped core surrounded by a cladding which is composed by elliptical air holes in silica arranged in a hexagonal array. The  important optical properties like effective area and nonlinear coefficient has been studied. Each characteristic has been investigated under different doping concentration within range of wavelength 800-1600 [nm].The intensity and the shape of output light in two dimension is shown in figure (1).

Results show that effective area increases with increase of wavelength[5] and effective area decreases with increase of doping concentration as shown in figure (2).