Cavity-enhanced absorption spectroscopy with a rapidly swept diode laser
- Cite this article as:
- Bakowski, B., Corner, L., Hancock, G. et al. Appl Phys B (2002) 75: 745. doi:10.1007/s00340-002-1026-1
- 154 Downloads
Cavity-enhanced absorption spectroscopy is explained in terms of the transmission function of a rapidly swept interferometer, and the integrated transmission is shown to be proportional to the cavity ringdown time. The technique is demonstrated on the b1Σg+-X3Σg- (1,0) band in molecular oxygen at 687 nm using a tunable diode laser and a relative-ly high-Q optical cavity (finesse ≈4000). A detection limit of 3×10-8 cm-1 s1/2 is achieved for a 0.8 cm-1 scanning range.