Document Detail

Dual-etalon frequency-comb cavity ringdown spectrometer.
MedLine Citation:
PMID:  22519318     Owner:  NLM     Status:  In-Data-Review    
We have demonstrated a spectroscopic technique for simultaneously obtaining broad spectral bandwidth and high frequency resolution absorption measurements, with 5 μs temporal resolution, continuously for tens of microseconds in an apparatus with no active stabilization. The technique utilizes two passive air-gap etalons to imprint two frequency comb patterns onto a single pulsed light source. The air-gap etalons also serve as cavity ringdown cells increasing the sensitivity of the absorption spectroscopy by increasing the interrogation path length. Here, we demonstrate the operation of the spectrometer utilizing a ∼0.15 cm(-1) bandwidth pulsed dye laser and two nearly identical 300 MHz free-spectral range confocal air-gap etalons each with a finesse of ∼1 × 10(5), to investigate the (1,1,3) overtone of water and the R(7) transition of the O(2) b(1)Σ(g) (+)←X(3)Σ(g) (-) (2,0) band with high spectral resolution.
David W Chandler; Kevin E Strecker
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  136     ISSN:  1089-7690     ISO Abbreviation:  J Chem Phys     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-04-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  154201     Citation Subset:  IM    
Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA.
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