Presentation Information

[22p-12A-7]Resolution of a highly sensitive liquid level meter using a twin-microbottle resonator

〇Motoki Asano1, Hiroshi Yamaguchi1, Hajime Okamoto1 (1.NTT BRL)


Cavity optomechanics,Liquid level meter,Optical microresonator

We realized the liquid level measurement, which is difficult to measure with conventional optomechanical devices, by using a coupled microbottle resonator, From the evaluation of the frequency stability, a resolution of 9.6 pm was obtained as the measurement limit of the liquid surface fluctuation in the band width of 5 Hz. This method can be applied to ultra-sensitive measurement of various interfacial fluctuations occurring at gas-liquid interfaces, liquid-liquid interfaces, and biomaterial surfaces.