Light beams with broad spectral bandwidth are indispensable for the generation of ultrashort light pulses. Here, the generation of broadband ultrashort light pulses from narrowband seeds in transparent media is demonstrated. Broadband light pulses with a spectral width of hundreds of nanometers can be generated seeding with narrowband light pulses. The full spectral bandwidths of the narrowband seeds are several nanometers. Broadband ultrashort pulses from about 500 nm to 1020 nm are obtained seeding with a light beam at around 900 nm with 9 nm full spectral bandwidth. The temporal and spatial parameters of the generated broadband pulses are measured and analyzed. A new method for the generation of wavelength tunable broadband ultrashort lights is presented. The broadband light beam generation phenomenon can be explained by ping-pong four wave mixing (PPFWM) process, which helps us to understand all the optical parametric processes visually. The generated broadband pulses have potential applications in ultrafast spectroscopy and ultrafast pump–probe experiments.

具有宽光谱带宽的光束对于产生超短光脉冲是必不可少的。在这里，演示了从透明介质中的窄带种子产生宽带超短光脉冲。可以通过窄带光脉冲产生光谱宽度为数百纳米的宽带光脉冲。窄带种子的全光谱带宽为几个纳米。使用大约 900 nm 的光束和 9 nm 全光谱带宽获得约 500 nm 至 1020 nm 的宽带超短脉冲。测量和分析生成的宽带脉冲的时间和空间参数。提出了一种产生波长可调宽带超短光的新方法。宽带光束的产生现象可以用乒乓四波混合（PPFWM）过程来解释，这有助于我们直观地理解所有的光学参数过程。产生的宽带脉冲在超快光谱学和超快泵浦探针实验中具有潜在的应用价值。