摘要

We propose a universal way to generate ultrashort pulse trains in arbitrary frequency regimes by means of Kerr nonlinear photonic crystal ultrafast all-optical switching. When a continuous laser light passes through a nonlinear photonic crystal with its band gap edge matching the laser light wavelength and pumped by a high-intensity femtosecond pulse laser, the ultrafast optical switching can lead to ultrashort pulse trains of transmission light. Simulation results show that the duration of the generated seed pulses can be as short as 12, 25, 54 and 68 fs for incident laser wavelengths of 0.633, 1.55, 5.12, and 10.6 mu m, respectively, and the signal-to-background ratio contrast is about 3 x 10(3), which is very suitable for the subsequent amplification of these seed pulses.

  • 出版日期2011-5
  • 单位中国科学院