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Parts per trillion sensitivity for ethane in air with an optical parametric oscillator cavity leak-out spectrometer.
MedLine Citation:
PMID:  15119381     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Spectroscopic detection of ethane in the 3-microm wavelength region was performed by means of a cw optical parametric oscillator and cavity leak-out. We achieved a minimum detectable absorption coefficient of 1.6 x 10(-10) cm 1/square root of Hz, corresponding to an ethane detection limit of 6 parts per trillion/square root of Hz. For 3-min integration time the detection limit was 0.5 parts per trillion. The levels are to our knowledge the best demonstrated so far. These frequency-tuning capabilities facilitated multigas analysis with simultaneous monitoring of ethane, methane, and water vapor in human breath.
Golo von Basum; Daniel Halmer; Peter Hering; Manfred Mürtz; Stephan Schiller; Frank Müller; Alexander Popp; Frank Kühnemann
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics letters     Volume:  29     ISSN:  0146-9592     ISO Abbreviation:  Opt Lett     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-05-03     Completed Date:  2004-05-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708433     Medline TA:  Opt Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  797-9     Citation Subset:  -    
Institut für Lasermedizin, Universität Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
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