Precise Diameter Measurement of a Microsphere Based on Polarization Analysis of Whispering Gallery Mode Resonance

Whispering gallery mode (WGM) resonance is used for the diameter measuring method of a microsphere smaller than φ 1 mm. It is aimed to achieve measurement accuracy better than 10 nm. There are two electromagnetic modes for WGMs, and then mis-detection of the electromagnetic mode expands measurement errors more than 100 nm, so it is indispensably to distinguish the electromagnetic mode. As theoretical simulation implies, polarization mode of WGMs can be selectively excited by controlling polarization of the incident light in optical coupling. Based on the analysis, it was proofed experimentally that the polarization of WGMs could be classified. As a result, the diameter measurement for a microsphere was performed with measurement error of ± 1 nm.

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Application of an automated complex resistance and phase difference measuring method for rheographic studies of human cardiovascular system

Journal of Physics Conference Series ◽

10.1088/1742-6596/2086/1/012113 ◽

2021 ◽

Vol 2086 (1) ◽

pp. 012113

Author(s):

A I Levin ◽

E A Pecherskaya ◽

Yu A Varenik ◽

V V Antipenko ◽

D V Artamonov ◽

...

Keyword(s):

Measurement Error ◽

Cardiovascular System ◽

Phase Difference ◽

Measurement Errors ◽

Measurement Accuracy ◽

Measuring Method ◽

Automated System ◽

Metrological Analysis ◽

Basic Measurement ◽

Human Cardiovascular System

Abstract The structure of an automated system for measuring the complex resistance of the human body and the phase difference is proposed. It is used in the rheographic method for diagnosing human cardiovascular system diseases using a multilevel microcontroller structure. The metrological analysis of the automated system made it possible to achieve an increase in the measurement accuracy both by reducing the methodological and instrumental components of measurement errors. The relative basic measurement error does not exceed ± 0.5%.

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605 Diameter measurement of microsphere using whispering gallery mode

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2015.90.218 ◽

2015 ◽

Vol 2015.90 (0) ◽

pp. 218-221

Author(s):

Masaki MICHIHATA ◽

Akifumi KAWASAKI ◽

Atsushi ADACHI ◽

Yasuhiro TAKAYA

Keyword(s):

Whispering Gallery Mode ◽

Diameter Measurement ◽

Whispering Gallery

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Diameter Measurement of microsphere based on whispering gallery mode resonance

The Proceedings of The Manufacturing & Machine Tool Conference ◽

10.1299/jsmemmt.2018.12.b25 ◽

2018 ◽

Vol 2018.12 (0) ◽

pp. B25

Author(s):

Masaki Michihata ◽

Yumeki Kobayashi ◽

Bohuai Chu ◽

Kiyoshi Takamasu ◽

Satoru Takahashi

Keyword(s):

Whispering Gallery Mode ◽

Diameter Measurement ◽

Whispering Gallery

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Radial mode number identification on whispering gallery mode resonances for diameter measurement of microsphere

Measurement Science and Technology ◽

10.1088/1361-6501/ab1241 ◽

2019 ◽

Vol 30 (6) ◽

pp. 065201 ◽

Cited By ~ 1

Author(s):

Yumeki Kobayashi ◽

Masaki Michihata ◽

Zheng Zhao ◽

Bohuai Chu ◽

Kiyoshi Takamasu ◽

...

Keyword(s):

Whispering Gallery Mode ◽

Radial Mode ◽

Mode Number ◽

Diameter Measurement ◽

Whispering Gallery

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Diameter Measurement of a Microsphere Based on Whispering Gallery Mode Resonance

Journal of the Japan Society for Precision Engineering ◽

10.2493/jjspe.84.77 ◽

2018 ◽

Vol 84 (1) ◽

pp. 77-84 ◽

Cited By ~ 1

Author(s):

Masaki MICHIHATA ◽

Bohuai CHU ◽

Zheng ZHAO ◽

Kohei HAYASHI ◽

Kiyoshi TAKAMASU ◽

...

Keyword(s):

Whispering Gallery Mode ◽

Diameter Measurement ◽

Whispering Gallery

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Diameter measurement of microsphere based on whispering gallery mode resonance

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2017.s1330105 ◽

2017 ◽

Vol 2017 (0) ◽

pp. S1330105

Author(s):

Masaki MICHIHATA ◽

Zhao ZHENG ◽

Chu Bo HUAI ◽

Kohei HAYASHI ◽

Kiyoshi TAKAMASU ◽

...

Keyword(s):

Whispering Gallery Mode ◽

Diameter Measurement ◽

Whispering Gallery

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Whispering Gallery Mode Resonators for Precision Temperature Metrology Applications

Sensors ◽

10.3390/s21082844 ◽

2021 ◽

Vol 21 (8) ◽

pp. 2844

Author(s):

Giovanni Gugliandolo ◽

Shahin Tabandeh ◽

Lucia Rosso ◽

Denis Smorgon ◽

Vito Fernicola

Keyword(s):

Whispering Gallery Mode ◽

Industrial Applications ◽

Standard Uncertainty ◽

Platinum Resistance ◽

Microwave Range ◽

Promising Alternative ◽

Whispering Gallery ◽

Resonance Frequencies ◽

Precision Temperature ◽

Better Than

In this work, the authors exploited the whispering gallery mode (WGM) resonator properties as a thermometer. The sensor is made of a cylindrical sapphire microwave resonator in the center of a gold-plated copper cavity. Two coaxial cables act as antennas and excite the WGM standing waves in the cylindrical sapphire at selected resonance frequencies in the microwave range. The system affords a high quality factor that enables temperature measurements with a resolution better than 15 µK and a measurement standard uncertainty of 1.2 mK, a value approximately three times better than that achieved in previous works. The developed sensor could be a promising alternative to platinum resistance thermometers, both as a transfer standard in industrial applications and as an interpolating instrument for the dissemination of the kelvin.

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