Fused silica based photonic crystal fiber with small modal area and high nonlinearity

In this article, a novel flint glass injected fused silica-based photonic crystal fiber is presented and numerically investigated for lower effective area and high numerical aperture applications. Commonly used finite element method based software is employed to extract the guiding characteristics of the reported optical waveguide. The wavelength-dependent refractive index is considered for both core and cladding materials to ensure higher accuracy. The numerical investigation ensures that a large amount of total power can be transferred through a small portion of the core due to the injection of high indexed glass at core with conventional optical fiber. Moreover, the proposed optical waveguide offers high numerical aperture with negligible confinement loss due to the smaller propagation area of the electromagnetic signal. The structure of this optical fiber is very simple which can be fabricated by utilizing any modern fabrication technique.