Abstract
In this paper, we present and numerically investigate Supercontinuum Generation (SCG) in ZBLAN circular lattice photonic crystal fiber with nearly zero ultra-flattened chromatic dispersion. The fiber dispersion properties are controlled by selectively liquid-filled and reduced air holes. The structure parameters have been optimized by using the fully vectorial finite-difference frequency-domain (FDFD) method combined with the perfectly matched layers (PML) boundary condition. Results indicate that a nearly zero ultra-flattened chromatic dispersion is obtained over a broad band of 300nm centered around 1.55μm with high nonlinearity and low confinement loss. Furthermore, SCG at 1.55μm is demonstrated with the optimized design. By using a 3.2kW peak power 100fs input secant-hyperbolic pulse, a symmetrical and relatively flat supercontinuum spectrum spanning 700nm in the range of 1200–1900nm is successfully generated.
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