Kuyken Bart, Liu Xiaoping, Osgood Richard M, Baets Roel, Roelkens Günther, Green William M J
Photonics Research Group, Department of Information Technology, Ghent University – imec, Ghent B-9000, Belgium.
Opt Express. 2011 Oct 10;19(21):20172-81. doi: 10.1364/OE.19.020172.
We demonstrate the generation of a supercontinuum in a 2 cm long silicon wire by pumping the wire with mid-infrared picosecond pulses in the anomalous dispersion regime. The supercontinuum extends from 1535 nm up to 2525 nm for a coupled peak power of 12.7 W. It is shown that the supercontinuum originates primarily from the amplification of background noise. A detailed analysis of the spectral components which are generated through phase-matched processes is applied to extract the group velocity dispersion and fourth-order dispersion coefficient of the silicon wire waveguide.
我们通过在反常色散区域用中红外皮秒脉冲泵浦一根2厘米长的硅线，展示了超连续谱的产生。对于12.7瓦的耦合峰值功率，超连续谱从1535纳米延伸至2525纳米。结果表明，超连续谱主要源于背景噪声的放大。通过对通过相位匹配过程产生的光谱成分进行详细分析，来提取硅线波导的群速度色散和四阶色散系数。
