Loading...
Please wait, while we are loading the content...
Similar Documents
Photoacoustic gas sensing employing fundamental and frequency-doubled radiation of a continuously tunable high-pressure CO2 laser
| Content Provider | Semantic Scholar |
|---|---|
| Author | Romann, Albert Sigrist, Markus Werner |
| Copyright Year | 2002 |
| Abstract | Abstract.We present the first photoacoustic spectrometer for gas sensing employing both the fundamental and the frequency-doubled radiation of a continuously tunable high-pressure CO2 laser with room temperature operation. A quasi-phase-matched diffusion-bonded GaAs crystal is used in the system for second-harmonic generation. A pulsed photoacoustic detection scheme with a non-resonant cell, equipped with an 80-microphone array, is employed. The wide continuous tuning range in the fundamental (9.2–10.7 μm) and the frequency-doubled (4.6–5.35 μm) regimes, together with the narrow linewidth of 540 MHz (0.018 cm-1) for the 10-μm region and of 1050 MHz (0.0315 cm-1) for the 5-μm region, allow the measurement of gas mixtures, individual species and isotope discrimination. This is illustrated with measurements on NO and CO2. The measured isotope ratio 15NO/14NO=(3.58±0.55)×10-3 agrees well with the literature (3.700×10-3) and demonstrates the good selectivity of the system. |
| Starting Page | 377 |
| Ending Page | 383 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s00340-002-0987-4 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s00340-002-0987-4 |
| Alternate Webpage(s) | https://doi.org/10.1007/s00340-002-0987-4 |
| Volume Number | 75 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
