Opt Lett. 2013 Oct 1;38(19):3953-6. doi: 10.1364/OL.38.003953.
We study the generation of parabolic self-similar optical pulses in tapered Si photonic nanowires (Si-PhNWs) at both telecom (λ=1.55 μm) and mid-infrared (λ=2.2 μm) wavelengths. Our computational study is based on a rigorous theoretical model, which fully describes the influence of linear and nonlinear optical effects on pulse propagation in Si-PhNWs with arbitrarily varying width. Numerical simulations demonstrate that, in the normal dispersion regime, optical pulses evolve naturally into parabolic pulses upon propagation in millimeter-long tapered Si-PhNWs, with the efficiency of this pulse-reshaping process being strongly dependent on the spectral and pulse parameter regime in which the device operates, as well as the particular shape of the Si-PhNWs.
我们研究了在锥形硅光子纳米线（Si-PhNWs）中在电信（λ=1.55μm）和中红外（λ=2.2μm）波长下产生抛物线自相似光脉冲的现象。我们的计算研究基于一个严格的理论模型，该模型充分描述了线性和非线性光学效应对具有任意变化宽度的 Si-PhNWs 中脉冲传播的影响。数值模拟表明，在正常色散区域中，在毫米长的锥形 Si-PhNWs 中传播时，光脉冲自然演变成抛物线脉冲，这种脉冲整形过程的效率强烈依赖于器件工作的光谱和脉冲参数范围，以及 Si-PhNWs 的特定形状。
