Broadband gain induced Raman comb formation in a silica microresonator
Broadband gain induced Raman comb formation in a silica microresonator
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DOI：
10.1364/josab.35.000933
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发表时间：
2017-12
影响因子：
1.9
通讯作者：
R. Suzuki;Akihiro Kubota;Atsuhiro Hori;Shun Fujii;T. Tanabe
中科院分区：
文献类型：
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作者：
R. Suzuki;Akihiro Kubota;Atsuhiro Hori;Shun Fujii;T. Tanabe
高 Q 值二氧化硅回音壁模式微谐振器是一个有吸引力的平台，可以在其上展示各种波长范围的宽锁相拉曼梳。拉曼梳可用于紧凑型脉冲激光源、传感器、光学时钟和相干断层扫描等应用。然而，拉曼梳的形成动力学尚未得到充分利用。在这里，我们研究了硅棒微谐振器中拉曼梳形成的动力学，该谐振器在微波速率下具有无腔光谱范围。我们生成了具有平滑光谱包络的拉曼梳，并观察了位于不同中心波长的两个拉曼梳之间的过渡。当我们改变泵浦失谐和微谐振器与光纤之间的耦合强度时，获得了过渡行为。我们还通过使用基于耦合模式方程的简单模型来解释这些现象。
A high-Q silica whispering gallery mode microresonator is an attractive platform on which to demonstrate a broad and phase-locked Raman comb in various wavelength regimes. Raman combs can be used for applications such as compact pulse laser sources, sensors, optical clocks, and coherence tomography. However, the formation dynamics of a Raman comb has not been well exploited. Here we study the dynamics of the Raman comb formation in silica rod microresonators, which have cavity-free spectral ranges in microwave rates. We generated a Raman comb with a smooth spectral envelope and also observed the transition between two Raman combs located at different center wavelengths. The transition behavior was obtained when we changed the pump detuning and the coupling strength between the microresonator and fiber. We also explain these phenomena by using a simple model based on coupled-mode equations.