Development of compact DSP based mid-infrared quantum cascade laser spectrometers

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dc.contributor.advisorTittel, Frank K.en_US
dc.creatorSo, Stephen G.en_US
dc.date.accessioned2009-06-04T08:07:50Zen_US
dc.date.available2009-06-04T08:07:50Zen_US
dc.date.issued2005en_US
dc.description.abstractThis thesis describes the development of digital signal processor (DSP) and quantum cascade laser (QCL) technology for compact, standalone, integrated, trace gas sensors capable of gas sensing at part-per-billion (ppb) concentration levels. Such sensitivity levels provide the ability to perform precise environmental and emissions monitoring, medical biomarker analysis, and biological/toxic agent detection. Current sensors based on tunable diode laser absorption spectroscopy (TDLAS) frequently require complex optical configurations or cryogenics to produce the proper mid-infrared optical frequencies, a full personal computer based data acquisition system to process data, and assorted nonintegrated support electronics for complete control of the system. In contrast, the developed system employs pulsed distributed feedback (DFB) QCLs to provide frequencies in the mid-infrared wavelengths targeting specific molecular ro-vibrational lines for simple direct absorption spectroscopy, while a custom DSP implementation provides integrated control and processing functions without sacrificing performance. Results show comparable sensitivities compared to traditional techniques, while simultaneously producing compact, robust, low power solutions.en_US
dc.format.extent58 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS E.E. 2005 SOen_US
dc.identifier.citationSo, Stephen G.. "Development of compact DSP based mid-infrared quantum cascade laser spectrometers." (2005) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17829">https://hdl.handle.net/1911/17829</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/17829en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectElectronicsen_US
dc.subjectElectrical engineeringen_US
dc.subjectOpticsen_US
dc.titleDevelopment of compact DSP based mid-infrared quantum cascade laser spectrometersen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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