We numerically demonstrate that picosecond pulse pumped supercontinuum (SC) generation in a silicon waveguide can be enhanced with the assistance of a weak continuous-wave (CW) trigger. The bandwidth of the resulting SC is greatly improved. The effects of two-photon absorption, free-carrier absorption, and free-carrier dispersion on SC generation in the silicon waveguide are studied. The optimized trigger position is close to the modulation instability peak. The results help us understand the details of SC generation in silicon waveguides in the presence of a CW trigger and noise. By tuning the wavelength of the CW trigger, we reach a good temporal coherence and intensity stability in the picosecond pulse pumped SC generation in a silicon waveguide.

中文翻译：

---

具有弱连续波触发的硅波导中皮秒脉冲泵浦超连续谱生成

我们用数值方法证明了借助于弱连续波（CW）触发可以增强皮波导中皮秒脉冲泵浦超连续谱（SC）的产生。所得SC的带宽大大提高。研究了双光子吸收，自由载流子吸收和自由载流子色散对硅波导中SC生成的影响。优化的触发位置接近调制不稳定性峰值。结果有助于我们了解在存在CW触发和噪声的情况下硅波导中SC生成的细节。通过调整CW触发器的波长，我们在硅波导中的皮秒脉冲泵浦SC生成中达到了良好的时间相干性和强度稳定性。