IFIMUP/IN-Institute of Nanoscience and Nanotechnology and Departamento de Física, Faculdade de Ciências,Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal.
Opt Lett. 2009 Aug 15;34(16):2489-91. doi: 10.1364/ol.34.002489.
We present a theoretical model and 2D numerical simulation of cascaded four-wave mixing of femtosecond pulses in bulk chi((3)) media, evidencing the importance of 2D interaction geometries in the efficient generation of frequency-converted pulses. Octave-spanning spectra and pulse synthesis down to the sub-two-cycle regime is demonstrated without the need for complex amplitude or phase control, in agreement with experimental measurements.
我们提出了一个关于飞秒脉冲在块状 χ((3)) 介质中级联四波混频的理论模型和二维数值模拟，证明了二维相互作用几何形状在有效产生频率转换脉冲方面的重要性。实验测量结果表明，无需复杂的振幅或相位控制，就可以实现扩展到一个倍频程的光谱和合成低于两个周期的脉冲。
