Ppb-level detection of ammonia based on QEPAS using a power amplified laser and a low resonance frequency quartz tuning fork

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dc.citation.firstpage29356en_US
dc.citation.issueNumber23en_US
dc.citation.journalTitleOptics Expressen_US
dc.citation.lastpage29364en_US
dc.citation.volumeNumber25en_US
dc.contributor.authorMa, Yufeien_US
dc.contributor.authorHe, Yingen_US
dc.contributor.authorTong, Yaoen_US
dc.contributor.authorYu, Xinen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2017-12-21T18:21:54Zen_US
dc.date.available2017-12-21T18:21:54Zen_US
dc.date.issued2017en_US
dc.description.abstractIn this report, an ultra-high sensitive quartz-enhanced photoacoustic spectroscopy (QEPAS) based ammonia (NH3) sensor using a power amplified diode laser and a low resonance frequency quartz tuning fork (QTF) was demonstrated for the first time. A fiber-coupled, continuous wave (CW), distributed feedback (DFB) diode laser with a watt level output power boosted by an erbium-doped fiber amplifier (EDFA) was used as the QEPAS excitation source. A QTF with a resonance frequency of 30.72 kHz was employed as an acoustic wave transducer. The modulation depth in the wavelength modulation spectroscopy (WMS) based QEPAS system was optimized theoretically and validated by experimental measurements. For the reported NH3 sensor system, a 418.4 ppbv (parts per billion by volume) minimum detection limit at a NH3 absorption line of 6533.4 cm−1 was achieved when the modulation depth was set to the optimum value of 0.188 cm−1. The ppb-level detection sensitivity verified the design of the reported QEPAS method and makes it suitable for use in environmental monitoring and other applications.en_US
dc.identifier.citationMa, Yufei, He, Ying, Tong, Yao, et al.. "Ppb-level detection of ammonia based on QEPAS using a power amplified laser and a low resonance frequency quartz tuning fork." <i>Optics Express,</i> 25, no. 23 (2017) The Optical Society: 29356-29364. https://doi.org/10.1364/OE.25.029356.en_US
dc.identifier.digitaloe-25-23-29356en_US
dc.identifier.doihttps://doi.org/10.1364/OE.25.029356en_US
dc.identifier.urihttps://hdl.handle.net/1911/98921en_US
dc.language.isoengen_US
dc.publisherThe Optical Societyen_US
dc.rightsCopyrighted by the Optical Society of America under the terms of the OSA Open Access Publishing Agreementen_US
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OAen_US
dc.titlePpb-level detection of ammonia based on QEPAS using a power amplified laser and a low resonance frequency quartz tuning forken_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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