Abstract
We present a theoretical overview and experimental demonstration of a continuous-wave, cavity-enhanced optical absorption spectrometry method to detect molecular gas. This technique utilizes the two non-degenerate polarization modes of a birefringent cavity to obtain a zero background readout of the intra-cavity absorption. We use a double-pass equilateral triangle optical cavity design with additional feed-forward frequency noise correction to measure the R14e absorption line in the 30012←00001 band of CO2 at 1572.655 nm.
| Original language | English |
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| Pages (from-to) | 33836-33849 |
| Number of pages | 14 |
| Journal | Optics Express |
| Volume | 29 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 11 Oct 2021 |