Sukhoivanov Igor A, Iakushev Sergii O, Shulika Oleksiy V, Díez Antonio, Andrés Miguel
Universidad de Guanajuato, Comunidad de Palo Blanco, C.P. 36730, Salamanca, GTO, Mexico.
Opt Express. 2013 Jul 29;21(15):17769-85. doi: 10.1364/OE.21.017769.
Formation of parabolic pulses at femtosecond time scale by means of passive nonlinear reshaping in normally dispersive optical fibers is analyzed. Two approaches are examined and compared: the parabolic waveform formation in transient propagation regime and parabolic waveform formation in the steady-state propagation regime. It is found that both approaches could produce parabolic pulses as short as few hundred femtoseconds applying commercially available fibers, specially designed all-normal dispersion photonic crystal fiber and modern femtosecond lasers for pumping. The ranges of parameters providing parabolic pulse formation at the femtosecond time scale are found depending on the initial pulse duration, chirp and energy. Applicability of different fibers for femtosecond pulse shaping is analyzed. Recommendation for shortest parabolic pulse formation is made based on the analysis presented.
分析了在正常色散光纤中通过被动非线性整形在飞秒时间尺度上形成抛物线脉冲的情况。研究并比较了两种方法：瞬态传播 regime 中的抛物线波形形成和稳态传播 regime 中的抛物线波形形成。结果发现，使用商用光纤、专门设计的全正色散光子晶体光纤和用于泵浦的现代飞秒激光器，这两种方法都可以产生短至几百飞秒的抛物线脉冲。根据初始脉冲持续时间、啁啾和能量，找到了在飞秒时间尺度上提供抛物线脉冲形成的参数范围。分析了不同光纤对飞秒脉冲整形的适用性。基于所呈现的分析，给出了形成最短抛物线脉冲的建议。
