Interband cascade laser based mid-infrared methane sensor system using a novel electrical-domain self-adaptive direct laser absorption spectroscopy (SA-DLAS)

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dc.citation.articleNumber25en_US
dc.citation.firstpage31876en_US
dc.citation.issueNumber25en_US
dc.citation.journalTitleOptics Expressen_US
dc.citation.lastpage31888en_US
dc.contributor.authorSong, Fangen_US
dc.contributor.authorZheng, Chuantaoen_US
dc.contributor.authorYan, Wanhongen_US
dc.contributor.authorYe, Weilinen_US
dc.contributor.authorWang, Yidingen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2018-07-02T18:19:42Zen_US
dc.date.available2018-07-02T18:19:42Zen_US
dc.date.issued2017en_US
dc.description.abstractTo suppress sensor noise with unknown statistical properties, a novel self-adaptive direct laser absorption spectroscopy (SA-DLAS) technique was proposed by incorporating a recursive, least square (RLS) self-adaptive denoising (SAD) algorithm and a 3291 nm interband cascade laser (ICL) for methane (CH4) detection. Background noise was suppressed by introducing an electrical-domain noise-channel and an expectation-known-based RLS SAD algorithm. Numerical simulations and measurements were carried out to validate the function of the SA-DLAS technique by imposing low-frequency, high-frequency, White-Gaussian and hybrid noise on the ICL scan signal. Sensor calibration, stability test and dynamic response measurement were performed for the SA-DLAS sensor using standard or diluted CH4ļ¾ samples. With the intrinsic sensor noise considered only, an Allan deviation of ~43.9 ppbv with a ~6 s averaging time was obtained and it was further decreased to 6.3 ppbv with a ~240 s averaging time, through the use of self-adaptive filtering (SAF). The reported SA-DLAS technique shows enhanced sensitivity compared to a DLAS sensor using a traditional sensing architecture and filtering method. Indoor and outdoor atmospheric CH4measurements were conducted to validate the normal operation of the reported SA-DLAS technique.en_US
dc.identifier.citationSong, Fang, Zheng, Chuantao, Yan, Wanhong, et al.. "Interband cascade laser based mid-infrared methane sensor system using a novel electrical-domain self-adaptive direct laser absorption spectroscopy (SA-DLAS)." <i>Optics Express,</i> no. 25 (2017) Optical Society of America: 31876-31888. https://doi.org/10.1364/OE.25.031876.en_US
dc.identifier.doihttps://doi.org/10.1364/OE.25.031876en_US
dc.identifier.urihttps://hdl.handle.net/1911/102330en_US
dc.language.isoengen_US
dc.publisherOptical Society of Americaen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleInterband cascade laser based mid-infrared methane sensor system using a novel electrical-domain self-adaptive direct laser absorption spectroscopy (SA-DLAS)en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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