Ringing phenomenon based measurement of weak mode-coupling strength in an optical microresonator.

Ringing phenomenon based measurement of weak mode-coupling strength in an optical microresonator.
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基于振铃现象的光学微谐振器中弱模耦合强度的测量

DOI:
10.1038/s41598-017-16961-7
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发表时间:
2017-12-12
期刊:
影响因子:
4.6
通讯作者:
Lin XM
Lin XM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ye MY;Shen MX;Lin XM

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在回音壁模(WGM)光学微谐振腔中,简并的顺时针(CW)模和逆时针(CCW)模之间总是存在耦合,这是因为微谐振腔的表面不可能是完全光滑的。在许多应用中测量这种耦合强度是很重要的。当耦合强度较强时,可以用常规的方法,即在平稳谱中观察模分裂来测量其值。然而,当耦合强度较弱时,常规方法将不起作用。实验证明,振铃现象可用于测量WGM光学微谐振腔中CW模和CCW模之间的弱耦合强度。
There is always a coupling between the degenerate clockwise (CW) and counter-clockwise (CCW) modes in a whisperinggallery- mode (WGM) optical microresonator, since the surface of the microresonator can not be perfectly smooth. It is important to measure this coupling strength in many applications. When the coupling strength is strong, the conventional method by observing mode splitting in the stationary spectrum can be used to measure its value. However, when the coupling strength is weak, the conventional method will not work. We experimentally demonstrate that the ringing phenomenon can be used to measure weak coupling strength between the CW and CCW modes in a WGM optical microresonator.
DOI: 10.1038/s41598-017-01494-w
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