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Title:LASER-INDUCED PLASMAS IN AMBIENT AIR FOR INCOHERENT BROADBAND CAVITY-ENHANCED ABSORPTION SPECTROSCOPY
Author(s):Ruth, Albert A
Contributor(s):Orphal, Johannes; Dixneuf, Sophie
Subject(s):Instrument/Technique Demonstration
Abstract:The emission from a laser-induced plasma in ambient air, generated by a high power femtosecond laser, was utilized as pulsed incoherent broadband light source in the center of a quasi-confocal high finesse cavity. The time dependent spectra of the light leaking from the cavity was compared with those of the laser-induced plasma emission without the cavity. It was found that the light emission was sustained by the cavity despite the initially large optical losses of the laser-induced plasma in the cavity. The light sustained by the cavity was used to measure part of the $rm S_1leftarrowrm S_0$ absorption spectrum of gaseous azulene at its vapour pressure at room temperature in ambient air as well as the strongly forbidden $gamma$--band in molecular oxygen: $rm b^1Sigma^+_g (nu'=2)leftarrow X^3Sigma^-_g (nu''=0)$
Issue Date:25-Jun-15
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:ACS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/79412
Date Available in IDEALS:2016-01-05


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