微腔光频梳研究进展:从均匀到非均匀泵浦

光频梳光谱在频域呈梳状等间距分布,兼具宽光谱、高相干、低相噪等特点,因此在光钟、测距、光谱检测、相干通信等诸 多领域具有良好应用前景。 微腔为光频梳产生提供了小型集成化平台,使得微腔光频梳,尤其是高相干的耗散克尔孤子光梳, 在近年备受研究者们关注。 绝大多数微腔光频梳的实现依赖于均匀连续光泵浦,然而非均匀泵浦,如相位调制与脉冲泵浦,因 其在孤子重频控制与能量转化效率方面具有特定优势,逐步进入研究者视野。 本文回顾了微腔光频梳研究进展,具体综述了关 于非均匀驱动场下耗散克尔孤子的产生及其动力学研究,并对其未来发展趋势进行了分析和展望。 非均匀泵浦能够提高耗散 克尔孤子的可控性及能量转化效率,将为更多微腔光频梳应用铺平道路。

Research progress on microcombs: From homogeneous to inhomogeneous driving

Optical frequency combs consists of a series of discrete and equidistant coherent lasers just like combs in the frequency domain, which has good application prospects in many fields such as optical clocks, ranging, spectral detection, coherent communication and other fields due to their wide spectrum, high coherence, and low phase noise. Microcavities provide a small and integrated platform for the generation of optical frequency combs, which makes microcombs attractive for researchers in recent years, especially for the highly-coherent dissipative Kerr soliton combs. The implementation of the vast majority of microcombs relies on homogeneous continuous wave driving. However, the inhomogeneous driving, such as pump in the presence of phase or amplitude inhomogeneities, has come into view owing to its specific advantages in soliton repetition control and energy conversion efficiency. In this article, the research progress of micro combs is reviewed. Specifically, an overview focusing on the generation and dynamics of dissipative Kerr soliton under inhomogeneous driving fields is provided. Future development trends and perspectives are also discussed. The inhomogeneous driving can improve the controllability and energy conversion efficiency of dissipative Kerr soliton, which gives the way for more microcomb applications