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Broadening compensation for ultrashort pulses in photonic crystals

机译:扩大对光子晶体中超短脉冲的补偿

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Extremely large group velocity dispersion of both signs can be achieved at the band edges of guided modes in photonic crystal waveguides. The selection of a proper value and sign of this parameter allows the design of short-length waveguides to compensate for pulse broadening. This pulse broadening can be caused, for instance, when a photonic crystal delay line is introduced. We present a theoretical study of the possibilities of using photonic crystal waveguides as intra-circuital dispersion compensation elements for ultrashort pulses, so the width of a transmitted pulse can be reduced. However, we also demonstrate that recovering the original pulse shape is not possible for these large-bandwidth pulses due to higher-order dispersion terms.
机译:可以在光子晶体波导中的导模的带边缘实现两个符号的极大的群速度色散。选择适当的值和该参数的符号允许设计短长度的波导以补偿脉冲展宽。例如,当引入光子晶体延迟线时,可能导致该脉冲展宽。我们提出了使用光子晶体波导作为超短脉冲的电路内色散补偿元件的可能性的理论研究,因此可以减小发射脉冲的宽度。但是,我们还证明,由于高阶色散项,对于这些大带宽脉冲,无法恢复原始脉冲形状。

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