摘要
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 Ge_(11.5)As_(24)Se_(64.5) 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 1.80μm to 11.32μm is generated by pumping 3.0-cm-long fiber at the central wavelength of 3.0μm,the peak power of 120 W,and the pulse duration of 250 fs.
基金
supported by the National Natural Science Foundation of China(No.61571237)
the Postgraduate Research and Innovation Program Project of Jiangsu(No.KYCX20_0795)。
