Mode Spectrum and Temporal Soliton Formation in Optical Microresonators
Mode Spectrum and Temporal Soliton Formation in Optical Microresonators
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DOI：
10.1103/physrevlett.113.123901
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发表时间：
2014-09-15
影响因子：
8.6
通讯作者：
Kippenberg, T. J.
中科院分区：
文献类型：
--
作者：
Herr, T.;Brasch, V.;Kippenberg, T. J.
光学微谐振器中时间耗散孤子的形成使紧凑、高重复频率的超短脉冲光源以及具有平滑光谱包络的低噪声、宽带光学频率梳成为可能。本文研究了微谐振腔模谱对晶体微谐振腔中时间孤子形成的影响。虽然需要整体反常的群速度色散，但我们发现，只要高阶色散不主宰谐振器的模式结构，就可以容忍高阶色散。研究发现，当影响到接近泵浦激光频率的腔模时，避免了由腔模谱中线性模式耦合引起的模式交叉，从而防止了孤子的形成。实验结果与基于非线性耦合模方程的数值模拟结果吻合较好。这些结果首次为光学微谐振腔中时间孤子的产生提供了设计准则。
The formation of temporal dissipative solitons in optical microresonators enables compact, high-repetition rate sources of ultrashort pulses as well as low noise, broadband optical frequency combs with smooth spectral envelopes. Here we study the influence of the microresonator mode spectrum on temporal soliton formation in a crystalline MgF2 microresonator. While an overall anomalous group velocity dispersion is required, it is found that higher order dispersion can be tolerated as long as it does not dominate the resonator's mode structure. Avoided mode crossings induced by linear mode coupling in the resonator mode spectrum are found to prevent soliton formation when affecting resonator modes close to the pump laser frequency. The experimental observations are in excellent agreement with numerical simulations based on the nonlinear coupled mode equations. The presented results provide for the first time design criteria for the generation of temporal solitons in optical microresonators.