RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Opt Lett. 2010 Jun 1;35(11):1887-9. doi: 10.1364/OL.35.001887.
We demonstrate methods to increase the energy incident on hollow fibers for spectral broadening by self-phase modulation. We used chirped pulses for spectral broadening, lowering the optical intensity to avoid ionization of the gaseous medium. We also used helium as a nonlinear medium and demonstrated the generation of 5.0fs, 5.0mJ pulses at a repetition rate of 1kHz using a pressure gradient hollow-fiber pulse compressor.
我们展示了通过自相位调制增加空心光纤上能量以实现光谱展宽的方法。我们使用啁啾脉冲进行光谱展宽，降低光强以避免气态介质的电离。我们还使用氦气作为非线性介质，并使用压力梯度空心光纤脉冲压缩器演示了重复频率为 1kHz 的 5.0fs、5.0mJ 脉冲的产生。
