MEASUREMENT OF MICRO-SPHERE DIAMETER BASED ON WHISPERING GALLERY MODE

Masaki Michihata, Akifumi Kawasaki, Atsushi Adachi, Yasuhiro Takaya

Abstract

In this study it is proposed the new measurement method for the diameter of a microsphere, which utilizes the whispering gallery mode (WGM). WGMs are the light propagation mode, so it is necessary to determine the mode number to the obtained WGM wavelength for the accurate diameter measurement. Using wide wavelength bandwidth and polarization control, it was possible to identify the mode number of the detected WGMs, which was conformed by comparison with the theoretical values. Finally, the diameter measurement was implemented and the results were compared with other measurement instrument, revealing the performance of the proposed technique, repeatability was greater than 10 nm and resolution was less than 1 nm.

Keywords

sphere, diameter, whispering gallery mode, resonance

Download

IMEKO-WC-2015-TC14-304.pdf

DOI

-

IMEKO TC

TC14 - Measurement of Geometrical Quantities

Back to the proceedings