Abstract
A mid-infrared spectrometer operating in the range from 3.42 to 4.78 μ m based on difference-frequency mixing of a tunable Ti:Sapphire laser and a diode-pumped monolithic Nd:YAG laser in periodically poled LiNbO3 (PPLN) crystals was developed. A system line width of about 36 MHz was obtained. An energy conversion efficiency of 0.6 mW/W2 was obtained at 3.70 μ m. The direct absorption spectra of pure methane and pure carbon dioxide samples were measured to test the performance of the spectrometer.
| Original language | English |
|---|---|
| Pages (from-to) | 1055-1058 |
| Number of pages | 4 |
| Journal | Optics and Lasers in Engineering |
| Volume | 45 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2007 |
| Externally published | Yes |
Keywords
- Nd-YAG laser
- Trace gas detection
- Tunable Ti:Sapphire laser