Large-capacity high-resolution optomechanical mass sensing based on free-space optical cavity

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Mass sensing offering both a broad detection range and a high resolving power is essential for quantitative precision content analysis and high-yield mass production of various kinds of materials. Here, we propose and successfully demonstrate a novel type of simple low-cost optomechanical mass sensing employing an optical displacement detector that consists of a free-space Fabry-Perot optical cavity and an intra-cavity wedge prism pair, which provides an enhanced resolution and an extended capacity simultaneously. By implementing the null-method-based scheme of mass measurement, we achieve a resolution higher than 5000:1 (mass range from <200 mg to >1 kg) and an excellent linearity of R-2>0.99998 in the prototype demonstration. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2018-11
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.26, no.24, pp.31567 - 31576

ISSN
1094-4087
DOI
10.1364/OE.26.031567
URI
http://hdl.handle.net/10203/248292
Appears in Collection
PH-Journal Papers(저널논문)
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