Sumetsky M
Opt Lett. 2017 Aug 15;42(16):3197-3200. doi: 10.1364/OL.42.003197.
An elongated bottle microresonator with nanoscale parabolic effective radius variation can possess a series of dense equally spaced optical eigenfrequencies whose separation can match the eigenfrequency of its axially symmetric acoustic mode. It is shown that this acoustic mode can parametrically excite optical modes and give rise to a highly equidistant and moderately broadband optical frequency comb with the teeth spacing independent of the input laser power and the amplitude of mechanical vibrations.
一种具有纳米级抛物线有效半径变化的细长瓶形微谐振器可以拥有一系列密集且等间距的光学本征频率，其间距可以与轴对称声学模式的本征频率相匹配。结果表明，这种声学模式可以参量激发光学模式，并产生高度等距且具有适度宽带的光学频率梳，其齿间距与输入激光功率和机械振动幅度无关。
