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:
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Event details
Event name:
XXI IMEKO World Congress
Title:

Measurement in Research and Industry

Place:
Prague, CZECH REPUBLIC
Time:
30 August 2015 - 04 September 2015
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