arXiv 2007.156302020-07physics.optics

相干驱动有源谐振器中的时间孤子

Temporal solitons in a coherently driven active resonator

Nicolas Englebert, Carlos Mas Arabí, Pedro Parra-Rivas, Simon-Pierre Gorza, François Leo

AI总结：

本文提出存在于低于激光阈值、相干驱动激光器中的有源腔孤子，并通过有源光纤谐振器实验与广义 Lugiato-Lefever 方程模拟验证其高峰值功率和高稳定性。

摘要：

光学频率梳是由大量等间距谱线组成的光波，对计量学、光谱学、通信和基础科学具有重要意义。频率梳最常通过在激光器或无源谐振器中激发耗散孤子来产生，但这两种平台都存在显著局限。在此，我们展示了两种平台的优势可以结合。我们引入一种新型孤子，称为有源腔孤子，其存在于被泵浦至激光阈值以下的相干驱动激光器中。我们使用一个有源光纤谐振器，并在低功率背景上测量到高峰值功率孤子，这与广义 Lugiato-Lefever 方程的模拟结果高度吻合。此外，我们发现放大自发辐射对孤子稳定性的影响可以忽略。我们的结果表明，相干驱动与非相干泵浦可以有效结合，以产生高功率、超稳定的脉冲序列，从而为频率梳形成开辟了新途径。

英文摘要：

Optical frequency combs are lightwaves composed of a large number of equidistant spectral lines. They are important for metrology, spectroscopy, communications and fundamental science. Frequency combs are most often generated by exciting dissipative solitons in lasers or in passive resonators, both of which suffer from significant limitations. Here, we show that the advantages of each platform can be combined. We introduce a novel kind of soliton, called active cavity soliton, hosted in coherently driven lasers pumped below the lasing threshold. We use an active fibre resonator and measure high peak power solitons on a low power background, in excellent agreement with simulations of a generalized Lugiato-Lefever equation. Moreover, we find that amplified spontaneous emission has negligible impact on the soliton's stability. Our results open up novel avenues for frequency comb formation by showing that coherent driving and incoherent pumping can be efficiently combined to generate a high-power ultra-stable pulse train.

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