Chaos-assisted two-octave-spanning microcombs
Chaos-assisted two-octave-spanning microcombs
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DOI：
10.1038/s41467-020-15914-5
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发表时间：
2020-05-11
影响因子：
16.6
通讯作者：
Xiao, Yun-Feng
中科院分区：
文献类型：
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作者：
Chen, Hao-Jing;Ji, Qing-Xin;Xiao, Yun-Feng
光频梳自发明以来，在从计量学到光谱学的许多领域都带来了革命性的变化。基于微谐振器的频率梳（微梳）的最新发展提供了在芯片上创建频率梳系统的独特途径。事实上，最近已经报道了基于微梳的光谱学、测距、光学合成器、电信和天文校准。许多集成梳状系统的关键是梳状光谱的广泛覆盖。在这里，超过两个倍频程跨度（450 nm至2,008 nm）的微梳是通过在变形的二氧化硅微腔中的chi（（2））和chi（（3））非线性来证明的。这种变形提升了圆对称性，并产生了混沌隧穿通道，使得能够用单个波导对腔内发射进行宽带收集。我们的演示引入了一个新的自由度，腔变形，微梳的研究，和我们的微梳光谱范围是有用的应用在光学钟，天文校准和生物成像。在这里，作者演示了使用混沌获得2倍频程梳产生。这种变形提升了圆对称性，并产生了混沌隧穿通道，使宽带收集腔内发射与一个单一的波导，引入一个新的自由度的微梳研究。
Since its invention, optical frequency comb has revolutionized a broad range of subjects from metrology to spectroscopy. The recent development of microresonator-based frequency combs (microcombs) provides a unique pathway to create frequency comb systems on a chip. Indeed, microcomb-based spectroscopy, ranging, optical synthesizer, telecommunications and astronomical calibrations have been reported recently. Critical to many of the integrated comb systems is the broad coverage of comb spectra. Here, microcombs of more than two-octave span (450 nm to 2,008 nm) is demonstrated through chi ((2)) and chi ((3)) nonlinearities in a deformed silica microcavity. The deformation lifts the circular symmetry and creates chaotic tunneling channels that enable broadband collection of intracavity emission with a single waveguide. Our demonstration introduces a new degree of freedom, cavity deformation, to the microcomb studies, and our microcomb spectral range is useful for applications in optical clock, astronomical calibration and biological imaging. Here, the authors demonstrate the use of chaos to obtain 2-octave comb generation. The deformation lifts the circular symmetry and creates chaotic tunneling channels that enable broadband collection of intracavity emission with a single waveguide, introducing a new degree of freedom to microcomb studies.