| Autor: |
Guan YJ, Bandutunga CP, Dong J, Lam TT, Fleddermann R, Gray MB, Chow JH |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2021 Oct 11; Vol. 29 (21), pp. 33836-33849. |
| DOI: |
10.1364/OE.435976 |
| Abstrakt: |
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 CO 2 at 1572.655 nm. We demonstrate a shot noise equivalent absorption of 3 × 10 -13 cm -1 Hz -1/2 . |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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