dc.contributor.advisor Tittel, Frank K. Petrov, Konstantin Petrovich 2009-06-04T00:03:49Z 2009-06-04T00:03:49Z 1995 Petrov, Konstantin Petrovich. "Application of diode-laser-pumped difference-frequency generation to spectroscopic trace gas detection in the atmosphere." (1995) Master’s Thesis, Rice University. https://hdl.handle.net/1911/13982. https://hdl.handle.net/1911/13982 The application of diode-laser-pumped tunable IR sources to trace gas detection in air is discussed. The design and technology issues of CW tunable mid-infrared difference-frequency generation are addressed. Feasibility experiments are reported in which the detection of CH$\sb4$, and CO was performed at low pressure and in air using two laser sources near 3.2 $\mu$m, and 4.7 $\mu$m, respectively. They were based on difference-frequency mixing in AgGaS$\sb2$ at room temperature. Pump sources used were a diode-pumped Nd:YAG laser at 1064 nm, a laser diode at 693 nm, and a tunable fiber-coupled Ti:Sapphire laser near 795 nm, and 813 nm. Detection limits of 2.4 ppb*m/$\rm\sqrt{Hz}$ for CO, and 9.0 ppb*m/$\rm\sqrt{Hz}$ for CH$\sb4$ in air are estimated for 0.1 $\mu$W of IR probe power based upon the performance of the sources and detector. 74 p. application/pdf eng ElectronicsElectrical engineeringAtmospheric sciencesOptics Application of diode-laser-pumped difference-frequency generation to spectroscopic trace gas detection in the atmosphere Thesis Text Applied Physics Natural Sciences Rice University Masters Master of Science THESIS APP.PHYS. 1995 PETROV
﻿