Generation of Optical Frequency Comb via Giant Optomechanical Oscillation,Physical Review Letters

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Generation of Optical Frequency Comb via Giant Optomechanical Oscillation
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-09-20 , DOI: 10.1103/physrevlett.127.134301
Yong Hu ₁ , Shulin Ding ₁ , Yingchun Qin ₁ , Jiaxin Gu ₁ , Wenjie Wan ₂ , Min Xiao _{1,

3} , Xiaoshun Jiang ₁

Affiliation

Optical frequency combs (OFCs) are essential in precision metrology, spectroscopy, distance measurement, and optical communications. Significant advances have been made recently in achieving micro-OFC devices based on parametric frequency conversion or electro-optic phase modulation. Here, we demonstrate a new kind of microcomb using a cavity optomechanical system with giant oscillation amplitude. We observe both optical and microwave frequency combs in a microtoroid resonator, which feature a flat OFC with 938 comb lines and a repetition rate as low as 50.22 MHz, as well as a flat microwave frequency comb with 867 comb lines. To generate such giant oscillation amplitude, we excite an overcoupled optical mode with a large blue detuning that is assisted with the thermo-optic nonlinearity. A new type of nonlinear oscillation, induced by competition between the optomechanical oscillation and thermo-optic nonlinearity, is also observed.

中文翻译：

通过巨大的光机械振荡产生光频梳

光频梳 (OFC) 在精密计量、光谱学、距离测量和光通信中必不可少。最近在实现基于参数频率转换或电光相位调制的微型 OFC 设备方面取得了重大进展。在这里，我们展示了一种使用具有巨大振荡幅度的腔体光机械系统的新型微梳。我们在微型环形谐振器中观察了光学和微波频率梳，其特点是具有 938 条梳线和低至 50.22 MHz 的重复频率的扁平 OFC，以及具有 867 条梳线的扁平微波频率梳。为了产生如此巨大的振荡幅度，我们激发了具有大的蓝色失谐的过耦合光学模式，该模式由热光非线性辅助。一种新型的非线性振荡，

更新日期：2021-09-20

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