We propose a practical scheme to demonstrate the combination and subsequent self-similar compression of two pulses with the same or different central wavelengths while propagating through a nonlinear fiber with exponentially decreasing dispersion. To initiate these processes, two raised cosine pulses with the same or different wavelengths is modulated using a phase modulator to acquire the same chirp at the input of the fiber. While propagating through the nonlinear fiber, these chirped pulses first coalesce into a single pulse and during further propagation get compressed into a single ultrashort high-power pulse. The output pulse possesses a large compression factor, high proportion of energy and peak power compared to a single input pulse. We also report the combination and compression of five raised cosine pulses with different wavelengths to achieve an appreciable compression effect, indicating that this system works well even with a small number of input pulses. The proposed scheme provides a simple way to generate high power ultrashort pulse with high energy and good quality in a short length of fiber.

中文翻译：

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具有相同或不同波长的多个脉冲的组合和压缩

我们提出了一个实用的方案来演示具有相同或不同中心波长的两个脉冲的组合和随后的自相似压缩，同时通过具有指数降低色散的非线性光纤传播。为了启动这些过程，使用相位调制器调制具有相同或不同波长的两个升余弦脉冲，以在光纤输入处获得相同的啁啾。在通过非线性光纤传播时，这些啁啾脉冲首先合并为单个脉冲，然后在进一步传播过程中被压缩为单个超短高功率脉冲。与单个输入脉冲相比，输出脉冲具有大的压缩因子、高比例的能量和峰值功率。我们还报告了五个不同波长的升余弦脉冲的组合和压缩，以实现可观的压缩效果，表明该系统即使在输入脉冲数量较少的情况下也能很好地工作。所提出的方案提供了一种在短光纤中产生具有高能量和良好质量的高功率超短脉冲的简单方法。