Title :
Nitrous oxide isotope ratio determination by mid-infrared laser spectroscopy
Author :
Waechter, Helen ; Sigrist, Markus W.
Author_Institution :
Inst. for Quantum Electron., Laser Spectrosc. & Sensing, ETH Zurich, Zurich
Abstract :
A fiber-coupled difference frequency generation laser spectrometer for measuring isotopic compositions of N2O at trace concentrations is presented. Using wavelength modulation 90/00 precision at 100 ppm is achieved. The accuracy is demonstrated with enriched samples.
Keywords :
fibre optic sensors; infrared spectroscopy; measurement by laser beam; optical frequency conversion; optical modulation; remote sensing by laser beam; spectrochemical analysis; N2O isotopic compositions; difference frequency generation; fiber-coupled laser spectrometer; midinfrared laser spectroscopy; nitrous oxide isotope ratio determination; trace concentrations; wavelength modulation; Fiber lasers; Isotopes; Laser beams; Laser tuning; Optical fiber polarization; Quantum cascade lasers; Reproducibility of results; Spectroscopy; Wavelength division multiplexing; Wavelength measurement; 190.4360; 280.1545; 300.6340; 300.6390;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
