Abstract
A multipass cell (MPC) design for laser absorption
spectroscopy is presented. The development of this new
type of optical cell was driven by stringent criteria for
compactness, robustness, low volume, and ease of use in
optical systems. A single piece of reflective toroidal
surface forms a near-concentric cavity with a volume of
merely 40cm³. Contrary to traditional MPCs, this design
allows for flexible path-length adjustments by simply
changing the aiming angle of the laser beam at the
entrance window. Two effective optical path lengths of
2.2 and 4.1 m were chosen to demonstrate the cell's
suitability for high-precision isotope ratio measurements
of CO2 at 1% and ambient mixing ratio levels.
| Original language | English |
|---|---|
| Pages (from-to) | 257-259 |
| Number of pages | 2 |
| Journal | Optics Letters |
| Volume | 38 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |