Numerical simulation of coherent mid-infrared supercontinuum generation based on carbon chloride core tapered photonic crystal fibers

Abstract

We numerically studied coherent mid-infrared (MIR) supercontinuum (SC) generated by filling carbon chloride (CCl4, C2Cl4) into the tapered photonic crystal fiber (PCF). The mechanism involves nonlinear soliton compression, Raman soliton self-frequency shift and dispersive wave generated in a carbon chloride core tapered PCF pumped by a 1.98 μm femtosecond laser. Numerical solution of the generalized nonlinear Schrodinger equation shows that 1.15–5.5 μm (CCl4-core tapered PCF) and 1.15–5.7 μm (C2Cl4-core tapered PCF) coherent MIR-SC sources can be realized. Our results show that the above liquid-core tapered PCFs are promising nonlinear media for constructing broadband coherent MIR-SC light sources.

Design and analysis of the C6H6-filled circular photonic crystal fiber with ultra-flat dispersion for broadband supercontinuum generation with peak power of 130 W and 250 W

“…The phenomenon of supercontinuum generation (SCG) that produces broadband, spatially coherent, and high-brightness light sources from extremely short pulses, has consistently served as an endless source of inspiration for fiber optic methods to control PCF dispersion have been developed including the use of highly nonlinear substrates such as glass chalcogenides and semiconductor materials [5,6], tapered fibers [7] or fibers with diverse geometries [8][9][10]. Among these silica-PCF is more popular because the characteristics of silica (SiO 2 ) material make the fiber production process more convenient.…”