dc.contributor.authorNi, Wenjun
dc.contributor.authorLu, Ping
dc.contributor.authorFu, Xin
dc.contributor.authorZhang, Wei
dc.contributor.authorShum, Perry Ping
dc.contributor.authorSun, Handong
dc.contributor.authorYang, Chunyong
dc.contributor.authorLiu, Deming
dc.contributor.authorZhang, Jiangshan
dc.identifier.citationNi, W., Lu, P., Fu, X., Zhang, W., Shum, P. P., Sun, H., . . . Zhang, J. (2018). Ultrathin graphene diaphragm-based extrinsic Fabry-Perot interferometer for ultra-wideband fiber optic acoustic sensing. Optics Express, 26(16), 20758-20767. doi:10.1364/OE.26.020758en_US
dc.description.abstractAn ultra-wideband fiber optic acoustic sensor based on graphene diaphragm with a thickness of 10nm has been proposed and experimentally demonstrated. The two reflectors of the extrinsic Fabry-Perot interferometer is consist of fiber endface and graphene diaphragm, and the cavity is like a horn-shape. The radius of the effective area of the ultrathin graphene diaphragm is 1mm. Attributed to the strong van der Waals force between the diaphragm and the ceramic ferrule, the sensor head can be applied not only in the air but also underwater. Experimental results illustrate that ultra-wideband frequency response is from 5Hz to 0.8MHz, covering the range from infrasound to ultrasound. The noise-limited minimum detectable pressure level of 0.77Pa/Hz1/2@5Hz and 33.97μPa/Hz1/2@10kHz can be achieved, and the applied sound pressure is 114dB and 65.8dB, respectively. The fiber optic acoustic sensor may have a great potential in seismic wave monitoring, photoacoustic spectroscopy and photoacoustic imaging application due to its compact structure, simple manufacturing, and low cost.en_US
dc.format.extent10 p.en_US
dc.relation.ispartofseriesOptics Expressen_US
dc.rights© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.en_US
dc.subjectFabry-Perot Interferometeren_US
dc.subjectFiber Optic Sensorsen_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen_US
dc.titleUltrathin graphene diaphragm-based extrinsic Fabry-Perot interferometer for ultra-wideband fiber optic acoustic sensingen_US
dc.typeJournal Article
dc.contributor.researchCNRS International NTU THALES Research Allianceen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US

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