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Express"],"published-print":{"date-parts":[[2022,2,28]]},"abstract":"<jats:p>Chlorinated hydrocarbons are frequently used as reagents and organic solvents in different industrial processes. Real-time detection of chlorinated hydrocarbons, as toxic air pollutants and carcinogenic species, is an important requirement for various environmental and industrial applications. In this study, a compact photoacoustic (PA) spectrophone based on a single acoustic resonator for simultaneous detection of trichloromethane (CHCl<jats:sub>3<\/jats:sub>) and dichloromethane (CH<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>) is first reported by employing a low-cost distributed feedback (DFB) laser emitting at 1684 nm. In consideration of the significant overlapping of absorption spectral from trichloromethane and dichloromethane, the multi-linear regression method was used to calculate the concentrations of CHCl<jats:sub>3<\/jats:sub> and CH<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub> with special characterization of the absorption profile. The current modulation amplitude and detection phase in the developed PA spectrophone was optimized for high sensitivity of individual components. The measurement interference of CHCl<jats:sub>3<\/jats:sub> and CH<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub> on each other was investigated for accurate detection, respectively. For field measurements, all optical elements were integrated into a 40 cm\u2009\u00d7\u200940 cm\u2009\u00d7\u200920 cm chassis. This paper provides an experimental verification which strongly recommends this sensor as a compact photoacoustic field sensor system for chlorinated hydrocarbon detection in different applications.<\/jats:p>","DOI":"10.1364\/oe.450685","type":"journal-article","created":{"date-parts":[[2022,1,21]],"date-time":"2022-01-21T11:00:07Z","timestamp":1642762807000},"page":"7053","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Compact photoacoustic spectrophone for simultaneously monitoring the concentrations of dichloromethane and trichloromethane with a single acoustic resonator"],"prefix":"10.1364","volume":"30","author":[{"given":"Gaoxuan","family":"Wang","sequence":"first","affiliation":[{"name":"Ningbo Research Institute, Zhejiang University"},{"name":"NingboTech University"},{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tie","family":"Zhang","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiming","family":"Jiang","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3401-1125","authenticated-orcid":true,"given":"Sailing","family":"He","sequence":"additional","affiliation":[{"name":"Ningbo Research Institute, Zhejiang University"},{"name":"NingboTech University"},{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2022,2,16]]},"reference":[{"key":"oe-30-5-7053-R1","doi-asserted-by":"publisher","first-page":"5","DOI":"10.1016\/j.cplett.2016.04.041","volume":"653","author":"Wang","year":"2016","journal-title":"Chem. 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