caa a22 4500 445368438 CHVBK 20180317142938.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s00340-011-4494-3 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4494-3 Modulation cancellation method in laser spectroscopy [Elektronische Daten] [V. Spagnolo, L. Dong, A. Kosterev, D. Thomazy, J. Doty III, F. Tittel] A novel spectroscopic technique based on modulation spectroscopy with two excitation sources and quartz enhanced photoacoustic spectroscopy is described. We demonstrated two potential applications of this detection technique. First, we investigated the measurement of small temperature differences in a gas mixture. In this case, a sensitivity of 30 mK in 17 sec was achieved for a C2H2/N2 gas mixture with a 0.5% C2H2 concentration. Second, we demonstrated the detection of broadband absorbing chemical species, for which we selected hydrazine as the target molecule and achieved a detection limit of∼1 part per million in 1 sec. In both cases, the measurements were performed with near-IR laser diodes and overtone transitions. Springer-Verlag, 2011 Spagnolo V. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Dong L. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Kosterev A. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Thomazy D. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Doty III J. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Tittel F. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut Applied Physics B Springer-Verlag 103/3(2011-06-01), 735-742 0946-2171 103:3<735 2011 103 340 https://doi.org/10.1007/s00340-011-4494-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4494-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Spagnolo V. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 700 1- Dong L. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 700 1- Kosterev A. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 700 1- Thomazy D. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 700 1- Doty III J. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 700 1- Tittel F. Department of Electrical and Computer Engineering, Rice University, 6100 South Main Street, 77005-1892, Houston, TX, USA aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 103/3(2011-06-01), 735-742 0946-2171 103:3<735 2011 103 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer