{"title":"基于QCL的低浓度ppb级N2O气体紧凑开路检测","authors":"B. Sohn, P. Xing, D. Tan","doi":"10.1109/CLEOPR.2017.8118802","DOIUrl":null,"url":null,"abstract":"We measured nitrous oxide (N2O) gas at concentrations as low as 2ppb using a multi-pass gas cell (MPGC) with an path length of 10m. The quantum cascade laser (QCL) was spectrally scanned in the range of 4529.4nm–4531nm having the strongest linear absorption cross-section of 3.6710−18 cm2, where the spectral absorption region of CO and CO2 is avoided. The absorption levels at spectral lines of 4529.80nm and 4530.22nm were measured to demonstrate a relation with variation of concentration of N2O. This strategy could be used in low power of laser with a limit of power detector because we are using linear absorption phenomena.","PeriodicalId":6655,"journal":{"name":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","volume":"28 1 1","pages":"1-2"},"PeriodicalIF":0.0000,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Compact open-path detection of N2O gas with low concentration of ppb level based on QCL\",\"authors\":\"B. Sohn, P. Xing, D. Tan\",\"doi\":\"10.1109/CLEOPR.2017.8118802\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We measured nitrous oxide (N2O) gas at concentrations as low as 2ppb using a multi-pass gas cell (MPGC) with an path length of 10m. The quantum cascade laser (QCL) was spectrally scanned in the range of 4529.4nm–4531nm having the strongest linear absorption cross-section of 3.6710−18 cm2, where the spectral absorption region of CO and CO2 is avoided. The absorption levels at spectral lines of 4529.80nm and 4530.22nm were measured to demonstrate a relation with variation of concentration of N2O. This strategy could be used in low power of laser with a limit of power detector because we are using linear absorption phenomena.\",\"PeriodicalId\":6655,\"journal\":{\"name\":\"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)\",\"volume\":\"28 1 1\",\"pages\":\"1-2\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-07-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/CLEOPR.2017.8118802\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CLEOPR.2017.8118802","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Compact open-path detection of N2O gas with low concentration of ppb level based on QCL
We measured nitrous oxide (N2O) gas at concentrations as low as 2ppb using a multi-pass gas cell (MPGC) with an path length of 10m. The quantum cascade laser (QCL) was spectrally scanned in the range of 4529.4nm–4531nm having the strongest linear absorption cross-section of 3.6710−18 cm2, where the spectral absorption region of CO and CO2 is avoided. The absorption levels at spectral lines of 4529.80nm and 4530.22nm were measured to demonstrate a relation with variation of concentration of N2O. This strategy could be used in low power of laser with a limit of power detector because we are using linear absorption phenomena.
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