Tittel, Frank K.2009-06-042009-06-041997Petrov, Konstantin Petrovich. "Compact gas sensors based on mid-infrared frequency conversion of semiconductor lasers." (1997) Diss., Rice University. <a href="https://hdl.handle.net/1911/19197">https://hdl.handle.net/1911/19197</a>.https://hdl.handle.net/1911/19197Design, development, and application of novel all-solid-state spectroscopic gas sensors is reported. These compact instruments employ mid-infrared difference-frequency generation pumped by room-temperature semiconductor lasers, and are capable of real-time selective measurement of trace gases in ambient air with better than 1 ppb precision (part per billion, by mole fraction). Their features and performance in the laboratory and field environment are examined and compared to that of traditional spectroscopic sensors.89 p.application/pdfengCopyright 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.Analytical chemistryPhysical chemistryElectronicsElectrical engineeringOpticsThesisTHESIS E.E. 1997 PETROV