{"title":"气体光声系统的信噪比","authors":"D. Pereira, A. Scalabrin","doi":"10.1016/0020-0891(92)90071-Z","DOIUrl":null,"url":null,"abstract":"<div><p>Measurement of small absorption coefficients of weakly absorbing or trace gases in the atmosphere has been one of the most important applications of laser photoacoustic devices. Normally, the major factor limiting the sensitivity of these systems is the spurious signal produced by the heating of the cell windows, due to the partial absorption of the laser pump radiation. We present a simple photoacoustic configuration that eliminates the spurious window and external background signals and enhances the main (real) signal of IR gaseous photoacoustic systems, optimizing the signal-to-noise ratio.</p></div>","PeriodicalId":81524,"journal":{"name":"Infrared physics","volume":"33 6","pages":"Pages 549-555"},"PeriodicalIF":0.0000,"publicationDate":"1992-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-0891(92)90071-Z","citationCount":"8","resultStr":"{\"title\":\"The signal to noise ratio of gaseous photoacoustic systems\",\"authors\":\"D. Pereira, A. Scalabrin\",\"doi\":\"10.1016/0020-0891(92)90071-Z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Measurement of small absorption coefficients of weakly absorbing or trace gases in the atmosphere has been one of the most important applications of laser photoacoustic devices. Normally, the major factor limiting the sensitivity of these systems is the spurious signal produced by the heating of the cell windows, due to the partial absorption of the laser pump radiation. We present a simple photoacoustic configuration that eliminates the spurious window and external background signals and enhances the main (real) signal of IR gaseous photoacoustic systems, optimizing the signal-to-noise ratio.</p></div>\",\"PeriodicalId\":81524,\"journal\":{\"name\":\"Infrared physics\",\"volume\":\"33 6\",\"pages\":\"Pages 549-555\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0020-0891(92)90071-Z\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Infrared physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/002008919290071Z\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Infrared physics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/002008919290071Z","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The signal to noise ratio of gaseous photoacoustic systems
Measurement of small absorption coefficients of weakly absorbing or trace gases in the atmosphere has been one of the most important applications of laser photoacoustic devices. Normally, the major factor limiting the sensitivity of these systems is the spurious signal produced by the heating of the cell windows, due to the partial absorption of the laser pump radiation. We present a simple photoacoustic configuration that eliminates the spurious window and external background signals and enhances the main (real) signal of IR gaseous photoacoustic systems, optimizing the signal-to-noise ratio.