“…To overcome this problem, many studies have been conducted to identify the most effective method for SCG generation. PCFs with new models are investigated through theoretical numerical simulation and experiment, focusing on changing a number of structural parameters, including crosssection, fiber core, air hole size in the cladding [8,[12][13][14] or highly nonlinear fluid filling the hollow core [15][16][17][18][19][20][21][22][23]. As a result, low-value, ultra-flat dispersion [9,18], high nonlinearity [22,23], and low attenuation [20,21] have been achieved broadening the SCG spectrum in the near-infrared and midinfrared regions.…”