Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers
A novel opto-electronic scheme for line-of-sight Near-IR gas absorption measurement based on direct absorption spectroscopy (DAS) is reported. A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in intern...
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Veröffentlicht in: | Applied optics (2004) 2012-12, Vol.51 (34), p.8057-8067 |
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creator | Karagiannopoulos, Solon Cheadle, Edward Wright, Paul Tsekenis, Stylianos McCann, Hugh |
description | A novel opto-electronic scheme for line-of-sight Near-IR gas absorption measurement based on direct absorption spectroscopy (DAS) is reported. A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in internal combustion engines. DAS is implemented with semiconductor optical amplifiers (SOAs) to enable wavelength multiplexing and to induce external intensity modulation for phase-sensitive detection. Two overtone water transitions in the Near-IR have been selected for ratiometric temperature compensation to enable concentration measurements, and an additional wavelength is used to account for nonabsorbing attenuation. A wavelength scanning approach was used to evaluate the new modulation technique, and showed excellent absorption line recovery. Fixed-wavelength, time-division-multiplexing operation with SOAs has also been demonstrated. To the best of our knowledge this is the first time SOAs have been used for modulation and switching in a spectroscopic application. With appropriate diode laser selection this scheme can be also used for other chemical species absorption measurements. |
doi_str_mv | 10.1364/AO.51.008057 |
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A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in internal combustion engines. DAS is implemented with semiconductor optical amplifiers (SOAs) to enable wavelength multiplexing and to induce external intensity modulation for phase-sensitive detection. Two overtone water transitions in the Near-IR have been selected for ratiometric temperature compensation to enable concentration measurements, and an additional wavelength is used to account for nonabsorbing attenuation. A wavelength scanning approach was used to evaluate the new modulation technique, and showed excellent absorption line recovery. Fixed-wavelength, time-division-multiplexing operation with SOAs has also been demonstrated. To the best of our knowledge this is the first time SOAs have been used for modulation and switching in a spectroscopic application. 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A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in internal combustion engines. DAS is implemented with semiconductor optical amplifiers (SOAs) to enable wavelength multiplexing and to induce external intensity modulation for phase-sensitive detection. Two overtone water transitions in the Near-IR have been selected for ratiometric temperature compensation to enable concentration measurements, and an additional wavelength is used to account for nonabsorbing attenuation. A wavelength scanning approach was used to evaluate the new modulation technique, and showed excellent absorption line recovery. Fixed-wavelength, time-division-multiplexing operation with SOAs has also been demonstrated. To the best of our knowledge this is the first time SOAs have been used for modulation and switching in a spectroscopic application. With appropriate diode laser selection this scheme can be also used for other chemical species absorption measurements.</description><subject>Absorption spectroscopy</subject><subject>Diodes</subject><subject>Imaging</subject><subject>Modulation</subject><subject>Semiconductor optical amplifiers</subject><subject>Temperature compensation</subject><subject>Wavelength multiplexing</subject><subject>Wavelengths</subject><issn>1559-128X</issn><issn>2155-3165</issn><issn>1539-4522</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkc1v1DAQxS1URLctt56Rjz2QxfbYcXJcVXxJRXsBqbfIcSatkROntlNY8c9j2NIrI43mHX7zDu8RcsnZlkMt3-32W8W3jDVM6RdkI7hSFfBanZBNkW3FRXN7Ss5S-s4YKNnqV-RUgGAatNyQX19Wn90P84ge57t8TwcXBqy8SRip6VOIS3ZhpmlBm2NINiwHuiY331H8mTHOxlM3Z5yTywc6hWH15u9Df6AJJ2fDPKw2h0hDMbKFNtPi3egwpgvycjQ-4eune06-fXj_9fpTdbP_-Pl6d1NZEDJXGmGswYygGdZKS2a4sgoEZ0ZLzoa20dBIyXvFeD2KXjTQ1k3LuRmGshLOydXRd4nhYcWUu8kli96bGcOaOg4lD-CNUv9HRRlgbQ0FfXtEbYklRRy7JbrJxEPHWfenmW637xTvjs0U_M2T89pPODzD_6qA3yACiu0</recordid><startdate>20121201</startdate><enddate>20121201</enddate><creator>Karagiannopoulos, Solon</creator><creator>Cheadle, Edward</creator><creator>Wright, Paul</creator><creator>Tsekenis, Stylianos</creator><creator>McCann, Hugh</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20121201</creationdate><title>Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers</title><author>Karagiannopoulos, Solon ; Cheadle, Edward ; Wright, Paul ; Tsekenis, Stylianos ; McCann, Hugh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c324t-7e3f63af370e65740a15c53210a7410d98738441b5016f2b283968911add1ad43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Absorption spectroscopy</topic><topic>Diodes</topic><topic>Imaging</topic><topic>Modulation</topic><topic>Semiconductor optical amplifiers</topic><topic>Temperature compensation</topic><topic>Wavelength multiplexing</topic><topic>Wavelengths</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Karagiannopoulos, Solon</creatorcontrib><creatorcontrib>Cheadle, Edward</creatorcontrib><creatorcontrib>Wright, Paul</creatorcontrib><creatorcontrib>Tsekenis, Stylianos</creatorcontrib><creatorcontrib>McCann, Hugh</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied optics (2004)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Karagiannopoulos, Solon</au><au>Cheadle, Edward</au><au>Wright, Paul</au><au>Tsekenis, Stylianos</au><au>McCann, Hugh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers</atitle><jtitle>Applied optics (2004)</jtitle><addtitle>Appl Opt</addtitle><date>2012-12-01</date><risdate>2012</risdate><volume>51</volume><issue>34</issue><spage>8057</spage><epage>8067</epage><pages>8057-8067</pages><issn>1559-128X</issn><eissn>2155-3165</eissn><eissn>1539-4522</eissn><abstract>A novel opto-electronic scheme for line-of-sight Near-IR gas absorption measurement based on direct absorption spectroscopy (DAS) is reported. A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in internal combustion engines. DAS is implemented with semiconductor optical amplifiers (SOAs) to enable wavelength multiplexing and to induce external intensity modulation for phase-sensitive detection. Two overtone water transitions in the Near-IR have been selected for ratiometric temperature compensation to enable concentration measurements, and an additional wavelength is used to account for nonabsorbing attenuation. A wavelength scanning approach was used to evaluate the new modulation technique, and showed excellent absorption line recovery. Fixed-wavelength, time-division-multiplexing operation with SOAs has also been demonstrated. To the best of our knowledge this is the first time SOAs have been used for modulation and switching in a spectroscopic application. With appropriate diode laser selection this scheme can be also used for other chemical species absorption measurements.</abstract><cop>United States</cop><pmid>23207374</pmid><doi>10.1364/AO.51.008057</doi><tpages>11</tpages></addata></record> |
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issn | 1559-128X 2155-3165 1539-4522 |
language | eng |
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source | Alma/SFX Local Collection; Optica Publishing Group Journals |
subjects | Absorption spectroscopy Diodes Imaging Modulation Semiconductor optical amplifiers Temperature compensation Wavelength multiplexing Wavelengths |
title | Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers |
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