caa a22 4500 445372583 CHVBK 20180317142952.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00340-010-3995-9 doi (NATIONALLICENCE)springer-10.1007/s00340-010-3995-9 Fiber laser intracavity absorption spectroscopy for in situ multicomponent gas analysis in the atmosphere and combustion environments [Elektronische Daten] [B. Löhden, S. Kuznetsova, K. Sengstock, V. Baev, A. Goldman, S. Cheskis, B. Pálsdóttir] Intracavity absorption spectroscopy with a broadband Er3+-doped fiber laser is applied for the measurements of several molecular species revealing quantitative information about the gas concentration, temperature and chemical reactions in flames. The spectral range of measurements extends from 6200cm−1 to 6550cm−1 with the proper choice of the fiber length and by moving an intracavity lens. With a pulsed laser applied in this experiment, the sensitivity to absorption corresponds to an effective absorption path length of 3km assuming the cavity is completely filled with the sample. For a cw laser, the effective absorption path length is estimated to be 50km. Absorption spectra of various molecules such as CO2, CO, H2O, H2S, C2H2 and OH were recorded separately in the cell and/or in low-pressure methane and propane flames. The presented measurements demonstrate simultaneous insitu detection of three molecular products of chemical reactions at different flame locations. Variation of the relative strengths of OH absorption lines with the temperature enables the estimation of the local flame temperature. The sensitivity of this laser does not depend on the broadband cavity losses and it can be used for insitu measurements of absorption spectra in hostile environments such as contaminated samples, flames or combustion engines. The presented technique can be applied for various diagnostic purposes, such as in environmental, combustion and plasma research, in medicine and in the determination of stable isotope ratios. Springer-Verlag, 2010 Löhden B. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut Kuznetsova S. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut Sengstock K. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut Baev V. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut Goldman A. School of Chemistry, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel aut Cheskis S. School of Chemistry, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel aut Pálsdóttir B. OFS Fitel Denmark, Priorparken 680, DK 2605, Brondby, Denmark aut Applied Physics B Springer-Verlag 102/2(2011-02-01), 331-344 0946-2171 102:2<331 2011 102 340 https://doi.org/10.1007/s00340-010-3995-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-010-3995-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Löhden B. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut NATIONALLICENCE 700 1- Kuznetsova S. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut NATIONALLICENCE 700 1- Sengstock K. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut NATIONALLICENCE 700 1- Baev V. Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany aut NATIONALLICENCE 700 1- Goldman A. School of Chemistry, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel aut NATIONALLICENCE 700 1- Cheskis S. School of Chemistry, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel aut NATIONALLICENCE 700 1- Pálsdóttir B. OFS Fitel Denmark, Priorparken 680, DK 2605, Brondby, Denmark aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 102/2(2011-02-01), 331-344 0946-2171 102:2<331 2011 102 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer