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.articleNumber25
dc.citation.firstpage31876
dc.citation.issueNumber25
dc.citation.journalTitleOptics Express
dc.citation.lastpage31888
dc.contributor.authorSong, Fang
dc.contributor.authorZheng, Chuantao
dc.contributor.authorYan, Wanhong
dc.contributor.authorYe, Weilin
dc.contributor.authorWang, Yiding
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2018-07-02T18:19:42Z
dc.date.available2018-07-02T18:19:42Z
dc.date.issued2017
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.
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.
dc.identifier.doihttps://doi.org/10.1364/OE.25.031876
dc.identifier.urihttps://hdl.handle.net/1911/102330
dc.language.isoeng
dc.publisherOptical Society of America
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.
dc.titleInterband cascade laser based mid-infrared methane sensor system using a novel electrical-domain self-adaptive direct laser absorption spectroscopy (SA-DLAS)
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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