Xu Yiqing, Erkintalo Miro, Lin Yi, Coen Stéphane, Ma Huilian, Murdoch Stuart G
Opt Lett. 2021 Dec 1;46(23):6002-6005. doi: 10.1364/OL.443153.
Microcombs-optical frequency combs generated in coherently driven nonlinear microresonators-have attracted significant attention over the last decade. The ability to generate two such combs in a single resonator device has, in particular, enabled a host of applications from spectroscopy to imaging. Concurrently, novel comb generation techniques such as synchronous pulsed driving have been developed to enhance the efficiency and flexibility of microcomb generation. Here, we report on the first, to the best of our knowledge, experimental demonstration of dual-microcomb generation via synchronous pulsed pumping of a single microresonator. Specifically, we use two electro-optically generated pulse trains derived from a common continuous wave laser to simultaneously drive two orthogonal polarization modes of an integrated silica ring resonator, observing the generation of coherent dissipative Kerr cavity soliton combs on both polarization axes. Thanks to the resonator birefringence, the two soliton combs are associated with different repetition rates, thus realizing a dual-microcomb source. To illustrate the source's application potential, we demonstrate proof-of-concept spectroscopic measurements.
微梳——在相干驱动的非线性微谐振器中产生的光学频率梳——在过去十年中引起了广泛关注。特别是，在单个谐振器装置中生成两个这样的频率梳的能力，使得从光谱学到成像等一系列应用成为可能。与此同时，诸如同步脉冲驱动等新型梳状生成技术也被开发出来，以提高微梳生成的效率和灵活性。在此，据我们所知，我们首次报道了通过对单个微谐振器进行同步脉冲泵浦来实现双微梳生成的实验演示。具体而言，我们使用源自同一连续波激光器的两个电光生成的脉冲序列，同时驱动集成硅环谐振器的两个正交偏振模式，观察到在两个偏振轴上都产生了相干耗散克尔腔孤子梳。由于谐振器的双折射，这两个孤子梳具有不同的重复率，从而实现了双微梳源。为了说明该光源的应用潜力，我们展示了概念验证光谱测量。
