Document Detail


Suppression of Raman-resonant interferences in rotational coherent anti-Stokes Raman spectroscopy using time-delayed picosecond probe pulses.
MedLine Citation:
PMID:  20548379     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We measure time-dependent pure-rotational coherent anti-Stokes Raman spectroscopy (CARS) spectra for room-temperature N(2), O(2), CO(2), C(2)H(4), and C(3)H(8), as well as in a C(3)H(8) diffusion flame, using picosecond lasers. Because Raman coherences for N(2) and O(2) persist significantly longer than those for the other species, delayed probing can significantly reduce unwanted resonant contributions to rotational coherent anti-Stokes Raman spectroscopy spectra, enabling temperature and relative O(2)/N(2) concentration determination in fuel-rich gas mixtures. Delayed probing also eliminates interference from smeared vibrational CARS. Probe delay affects both the temperature and relative O(2)/N(2) concentrations inferred from rotational spectra when using a standard frequency-domain analysis.
Authors:
Thomas Seeger; Johannes Kiefer; Yi Gao; Brian D Patterson; Christopher J Kliewer; Thomas B Settersten
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics letters     Volume:  35     ISSN:  1539-4794     ISO Abbreviation:  Opt Lett     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-06-15     Completed Date:  2011-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708433     Medline TA:  Opt Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2040-2     Citation Subset:  -    
Affiliation:
Lehrstuhl für Technische Thermodynamik and Erlangen Graduate School in Advanced Optical Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Am Weichselgarten 8, D-91058, Erlangen, Germany.
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