Abstract
We report the development of a field-deployable, pulsed quantum cascade laser spectrometer. The instrument is designed to measure the 13C/12C isotopic ratio in the CO2 released from volcanic vents. Specific 12CO2 and 13CO 2 absorption lines were selected around 4.3 μm, where the P-branch of 12CO2 overlaps the R-branch of 13CO 2 of the 0001-0000 vibrational transition. This particular selection makes the instrument insensitive to temperature variations. A dual-channel cell balances the two absorption signals. We provide details of the instrument design and a preliminary demonstration of its performance based on laboratory measurements of 16O 12C 16O and 16O12C18O.
Original language | English (US) |
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Pages (from-to) | 255-260 |
Number of pages | 6 |
Journal | Applied Physics B: Lasers and Optics |
Volume | 80 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2005 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
- General Physics and Astronomy