Departament d'Òptica, Universitat de València, 46100 Burjassot, Spain. david.castello‐
Opt Lett. 2012 Jul 1;37(13):2757-9. doi: 10.1364/OL.37.002757.
Spectral broadening in silicon waveguides is usually inhibited at telecom wavelengths due to some adverse effects related to semiconductor dynamics, namely, two-photon and free-carrier absorption (FCA). In this Letter, our numerical simulations show that it is possible to achieve a significant enhancement in spectral broadening when we properly preshape the input pulse to reduce the impact of FCA on spectral broadening. Our analysis suggests that the use of input pulses with the correct skewness and power level is crucial for this achievement.
硅波导中的光谱展宽通常会由于与半导体动力学相关的一些不利影响而在电信波长处受到抑制，即双光子吸收和自由载流子吸收。在这封信件中，我们的数值模拟表明，当我们适当预整形输入脉冲以降低 FCA 对光谱展宽的影响时，有可能显著增强光谱展宽。我们的分析表明，对于实现这一目标，使用具有正确偏度和功率水平的输入脉冲是至关重要的。
