Cavity enhanced FTIR spectroscopy using a femto OPO absorption source
- 4 August 2011
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 109 (17-18) , 2173-2179
Abstract
The ν1 + ν3 band of 12C2H2 was recorded using a high resolution continuous scan Fourier transform interferometer fitted with a femto OPO absorption source. Various experimental schemes were successfully implemented, including multipass absorption in a cell and also in a supersonic expansion, and cavity enhanced absorption. An optimal rms noise equivalent absorption of 2.2 × 10−9 cm−1 Hz−1/2 per spectral element was reached in the latter case, corresponding to αmin = 1.5 × 10−7 cm−1. Performances are illustrated and discussed.Keywords
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