| Literature DB >> 23939085 |
A G V Bergin1, G Hancock, G A D Ritchie, D Weidmann.
Abstract
A cw distributed feedback quantum cascade laser (DFB-QCL) coupled to a two-mirror linear optical cavity has been used to successfully demonstrate optical-feedback cavity-enhanced absorption spectroscopy (OF-CEAS) at 5.5 μm. The noise-equivalent absorption coefficient, α(min), was 2.4×10(-8) cm(-1) for 1 s averaging, limited by etalon-fringing. The temporal stability of the instrument allows NO detection down to 5 ppb in 2 s.Year: 2013 PMID： 23939085 DOI： 10.1364/OL.38.002475
Source DB: PubMed Journal: Opt Lett ISSN： 0146-9592 Impact factor: 3.776