[22p-12A-1~15] 3.13 Optical control devices and optical fibers (formerly 3.14)

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[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)

Keywords:

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.