Keywords Ultrashort pulse;propagation property;anomalous spectrum;Rayleigh-Sommerfeld diffraction integral;angular spectrum method;Fourier transform;free space;dispersive medium;circular aperture;

• 超短脉冲;传输特性;光谱异常;瑞利-索末菲衍射积分;角谱法;傅里叶变换;自由空间;色散介质;圆孔光阑;