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dc.contributor.authorMa, Yufei
He, Ying
Tong, Yao
Yu, Xin
Tittel, Frank K.
dc.date.accessioned 2017-12-21T18:21:54Z
dc.date.available 2017-12-21T18:21:54Z
dc.date.issued 2017
dc.identifier.citation Ma, 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." Optics Express, 25, no. 23 (2017) The Optical Society: 29356-29364. https://doi.org/10.1364/OE.25.029356.
dc.identifier.urihttps://hdl.handle.net/1911/98921
dc.description.abstract In 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.
dc.language.iso eng
dc.publisher The Optical Society
dc.rights Copyrighted by the Optical Society of America under the terms of the OSA Open Access Publishing Agreement
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OA
dc.title Ppb-level detection of ammonia based on QEPAS using a power amplified laser and a low resonance frequency quartz tuning fork
dc.type Journal article
dc.citation.journalTitle Optics Express
dc.citation.volumeNumber 25
dc.citation.issueNumber 23
dc.identifier.digital oe-25-23-29356
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1364/OE.25.029356
dc.type.publication publisher version
dc.citation.firstpage 29356
dc.citation.lastpage 29364


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