Time- and intensity-dependent broadband cavity-enhanced absorption spectroscopy with pulsed intra-cavity laser-induced plasmas

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dc.contributor.authorKeary, Bryan P.
dc.contributor.authorRuth, Albert A.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2019-12-05T14:31:38Z
dc.date.available2019-12-05T14:31:38Z
dc.date.issued2019-12-04
dc.date.updated2019-12-05T12:31:33Z
dc.description.abstractA pulsed laser-induced plasma (LIP) was generated in ambient air inside a high-finesse (F ≈ 5200) near-concentric optical cavity. The optical plasma emission was successfully trapped and sustained by the cavity, manifested by ring-down times in excess of 4 μs indicating effective mirror reflectivities of ∼0.9994. The light leaking from the cavity was used to measure broadband absorption spectra of gaseous azulene under ambient air conditions between 580 and 645 nm, employing (i) intensity-dependent cavity-enhanced, and (ii) time-dependent cavity-ring down methodologies. Minimum detectable absorption coefficients of 4.7 × 10−8 cm−1 and 7.4 × 10−8 cm−1 were achieved for the respective approaches. The two approaches were compared and implications of pulsed excitation for gated intensity-dependent measurements were discussed.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKeary, Bryan P.; Ruth, Albert A. (2019) 'Time- and intensity-dependent broadband cavity-enhanced absorption spectroscopy with pulsed intra-cavity laser-induced plasmas'. Optics Express, 27(25), pp. 36864-36874. doi: 10.1364/OE.27.036864en
dc.identifier.doi10.1364/OE.27.036864en
dc.identifier.eissn1094-4087
dc.identifier.endpage36874en
dc.identifier.issued25en
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage36864en
dc.identifier.urihttps://hdl.handle.net/10468/9347
dc.identifier.volume27en
dc.language.isoenen
dc.publisherOptical Society of Americaen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Frontiers Programme (RFP)/11/RFP.1/PHY/3233/IE/Anti-Stokes fluorescence of organic dyes: potential new materials for laser cooling in solids/en
dc.relation.urihttp://www.opticsexpress.org/abstract.cfm?URI=oe-27-25-36864
dc.rights© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreementen
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OAen
dc.subjectAbsorption coefficienten
dc.subjectAbsorption spectroscopyen
dc.subjectExtinction coefficientsen
dc.subjectNd:YAG lasersen
dc.subjectPlasma processesen
dc.subjectRayleigh scatteringen
dc.titleTime- and intensity-dependent broadband cavity-enhanced absorption spectroscopy with pulsed intra-cavity laser-induced plasmasen
dc.typeArticle (peer-reviewed)en
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