Abstract
We present a new scheme for a pump-probe mode-mismatched thermal lensing experiment aimed at extracting the value of low-absorbing components in the presence of a high-absorbing background. The method allows for the use of large path-length samples. Changes in the background absorption of a column of ethanol of 20 cm of 1 % and a pollutant concentration detection limit of 0.04 ppm are obtained when using a pump light power of 34 mW.
| Original language | English |
|---|---|
| Pages (from-to) | 1278-1281 |
| Number of pages | 4 |
| Journal | Applied Spectroscopy |
| Volume | 57 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2003 |
| Externally published | Yes |
Keywords
- Absorption
- Thermal lens
- Z-scan