Abstract
A novel large mode area (LMA) photonic crystal fibers (PCFs) are proposed in this paper. LMA is obtained by selectively material-filled structural PCFs in which six air-holes near the center are filled with high refractive index material. It provides a new method to design and realize LMA PCFs. The transmission characteristics such as effective mode areas, chromatic dispersion, and confinement losses are investigated and also the influences of structure parameters are numerically analyzed by employing the full vectorial finite element method (FEM). Numerical results demonstrate that effective mode area can improve, small and flat dispersion is achieved, and confinement losses are still acceptable by applying our novel selectively material-filled technology. Compared with the traditional method achieving LMA, it has perfect performances and it is simple and easy to fabricate.
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