[15p-WL2_301-1~9] 3.7 Optical measurement, instrumentation, and sensor

1:30 PM - 1:45 PM JST(4:30 AM - 4:45 AM UTC)

[15p-WL2_301-1] Improvement of displacement sensitivity in fluctuation of water-droplet ripplon via vapor-assisted cavity ripplonics

〇Motoki Asano¹, Riku Takahashi^1,2, Koji Sakai^1,2, Aya Tanaka^1,2, Hiroshi Yamaguchi¹, Hajime Okamoto¹ (1.NTT BRL, 2.NTT BMC)

Keywords:

Optical microresonator,Optomechanics,Ripplon

By exploiting the coupling between an optical microresonator fabricated on a fiber and the vapor field, it is possible to observe microscopic surface vibrations (ripplons) of a water droplet. In this work, through device miniaturization, increased laser power, and precise control of the resonator position, we achieved a measurement sensitivity of 0.32 pm, which represents the highest value reported to date.