Cavity-enhanced absorption spectroscopy with a rapidly swept diode laser
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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.
- Cavity-enhanced absorption spectroscopy with a rapidly swept diode laser
Applied Physics B
Volume 75, Issue 6-7 , pp 745-750
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- PACS: 42.55.Px; 42.62.Fi; 42.68.Ca
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