Broadband supercontinuum generation and Raman response in Ge11.5As24Se64.5 based chalcogenide photonic crystal fiber

We numerically demonstrated that the generation of 1.4-10 μm mid-infrared supercontinuum from highly nonlinear Ge<sub>11.5</sub>As<sub>24</sub>Se<sub>64.5</sub> based photonic crystal fiber chalcogenide glass. This ultra-broadband supercontinuum achieved for 150 mm long photonic crystal fiber pumped with 85 femto-second laser pulses operated at 3.1 μm and peak power pulse is 5 kW. A broad and flat dispersion profile of Ge<sub>11.5</sub>As<sub>24</sub>Se<sub>64.5</sub> PCF associated with the extreme nonlinearity and generate hyper broadband supercontinuum. Raman gain of Ge<sub>11.5</sub>As<sub>24</sub>Se<sub>64.5</sub> glass is four times higher to fused silica and As<sub>2</sub>Se<sub>3</sub> glass and Raman frequency shift for the Ge<sub>11.5</sub>As<sub>24</sub>Se<sub>64.5</sub> glass is ≈ 7.1 THz.

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