Ringing phenomenon based whispering-gallery-mode sensing

Scientific Reports
Ming-Yong YeXiu-Min Lin

Abstract

Highly sensitive sensing is one of the most important applications of whispering-gallery-mode (WGM) microresonators, which is usually accomplished through a tunable continuous-wave laser sweeping over a whispering-gallery mode with the help of a fiber taper in a relative slow speed. It is known that if a tunable continuous-wave laser sweeps over a high quality whispering-gallery mode in a fast speed, a ringing phenomenon will be observed. The ringing phenomenon in WGM microresonators is mainly used to measure the Q factors and mode-coupling strengths. Here we experimentally demonstrate that the WGM sensing can be achieved based on the ringing phenomenon. This kind of sensing is accomplished in a much shorter time and is immune to the noise caused by the laser wavelength drift.

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Citations

Jun 21, 2016·Sensors·Giancarlo C Righini, Silvia Soria
Aug 10, 2017·Optics Express·Yuan ChenChun-Hua Dong
Jan 27, 2019·Sensors·Antonio GiorginiGianluca Gagliardi
Feb 9, 2017·Scientific Reports·A GiorginiG Gagliardi

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Methods Mentioned

BETA
light scattering

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