caa a22 4500 445369728 CHVBK 20180317142942.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00340-011-4587-z doi (NATIONALLICENCE)springer-10.1007/s00340-011-4587-z Fast and sensitive time-multiplexed gas sensing of multiple lines using a miniature telecom diode laser between 1529 nm and 1565 nm [Elektronische Daten] [M. Lewander, A. Fried, P. Weibring, D. Richter, S. Spuler, L. Rippe] High-sensitive multi-species detection around 1550nm using a modulated grating Y-branch, MG-Y, diode laser tunable between 1529nm and 1565nm is presented. The MG-Y diode laser is based on the Vernier effect of two modulated gratings, and exhibits quasi-continuous tuning over 36nm. Multi-species detection is achieved by fast sequential scanning of single absorption lines of CH4, CO, C2H2, and CO2 distributed over the tuning range of the diode laser. The laser wavelength is scanned about 10GHz around each absorption line for 5 ms and this is followed by a discrete large jump in operating wavelength to the next line. The MG-Y diode laser has a good repeatability in output frequency between sequential scan segments (<10MHz) enabling averaging of the scans. The setup employs digital wavelength modulation spectroscopy, dWMS, with Fourier-based WMS retrieval, applicable through the use of data acquisition cards and coherent sampling. Absorbance sensitivity using 2f-WMS signals of 7×10−7 in 30 s (all precisions in this paper are at the 1σ level) is demonstrated for sensing of four gases and 2×10−7 when only one gas is detected. Corresponding numbers for 0.5s of averaging are 4×10−6 and 1×10−6. Springer-Verlag, 2011 Lewander M. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Fried A. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Weibring P. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Richter D. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Spuler S. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Rippe L. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut Applied Physics B Springer-Verlag 104/3(2011-09-01), 715-723 0946-2171 104:3<715 2011 104 340 https://doi.org/10.1007/s00340-011-4587-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4587-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lewander M. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Fried A. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Weibring P. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Richter D. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Spuler S. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Rippe L. National Center for Atmospheric Research, Earth Observing Laboratory, 3450 Mitchell Lane, 80301, Boulder, CO, USA aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/3(2011-09-01), 715-723 0946-2171 104:3<715 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer