Zhu Ming, Liu Hongjun, Li Xuefeng, Huang Nan, Sun Qibing, Wen Jin, Wang Zhaolu
State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, 710119, China.
Opt Express. 2012 Jul 2;20(14):15899-907. doi: 10.1364/OE.20.015899.
We propose a new strip/slot hybrid waveguide with double slots, which exhibits a flat and low dispersion over a 1098-nm bandwidth with four zero-dispersion wavelengths. Dispersion of dual-slot silicon waveguide is mainly determined by mode transition from a strip mode to a slot mode rather than by material dispersion. Dispersion tailoring is investigated by tuning different structural parameters of waveguides. Moreover, nonlinear coefficient of dual-slot silicon waveguide and phase-matching condition in FWM are both explored in detail. The dual-slot waveguide can be used to generate supercontinuum with bandwidth extending up to 1630 nm pumped by femtosecond pulses. This waveguide will have a great potential for ultrabroadband signal processing applications from near-infrared region to mid-infrared region.
我们提出了一种新型的具有双槽的条形/槽混合波导，它在1098纳米带宽内具有四个零色散波长，呈现出平坦且低的色散特性。双槽硅波导的色散主要由从条形模式到槽模式的模式转变决定，而非由材料色散决定。通过调整波导的不同结构参数来研究色散调控。此外，还详细探讨了双槽硅波导的非线性系数以及四波混频中的相位匹配条件。该双槽波导可用于在飞秒脉冲泵浦下产生带宽扩展至1630纳米的超连续谱。这种波导在从近红外区域到中红外区域的超宽带信号处理应用中将具有巨大潜力。
