SHI Weihua,ZHANG Tiantian,XU Chuanxiang.Numerical research on mid-infrared supercontinuum generation in Ge11.5As24Se64.5 few-mode photonic crystal fibers[J].Optoelectronics Letters,2022,(4):233-237
Numerical research on mid-infrared supercontinuum generation in Ge11.5As24Se64.5 few-mode photonic crystal fibers
Author NameAffiliation
SHI Weihua College of Electronic and Optical Engineering & College of Flexible Electronics Future Technology, Nanjing University of Posts and Telecommunications, Nanjing 210023, China 
ZHANG Tiantian College of Electronic and Optical Engineering & College of Flexible Electronics Future Technology, Nanjing University of Posts and Telecommunications, Nanjing 210023, China 
XU Chuanxiang College of Electronic and Optical Engineering & College of Flexible Electronics Future Technology, Nanjing University of Posts and Telecommunications, Nanjing 210023, China 
Abstract:
      Based on the nonlinear and mode coupling effect in few-mode photonic crystal fiber (FM-PCF), an approach for supercontinuum (SC) generation in the mid-infrared (MIR) region is proposed. The propagation characteristics of Ge11.5As24Se64.5 FM-PCF have been analyzed and optimized by the full-vector finite element method. The two-mode generalized nonlinear Schrodinger equation (TM-GNLSE) is set up, and the SC generation has been analyzed by the split-step Fourier method. The SC from 1.80 μm to 11.32 μm is generated by pumping 3.0-cm-long fiber at the central wavelength of 3.0 μm, the peak power of 120 W, and the pulse duration of 250 fs.
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