Incoherent broad-band cavity-enhanced absorption spectroscopy
Abstract
A new highly sensitive method for incoherent broad-band cavity-enhanced absorption measurements of gaseous samples, using a white-light source is demonstrated. The light of a short-arc Xe-lamp transmitted by an optically stable cavity is dispersed with a grating monochromator and detected by a sensitive photodiode-array. The technique is a development of the previously published principle of cavity-enhanced absorption spectroscopy. The method is characterized by great experimental simplicity, high sensitivity, and high temporal resolution. These features are demonstrated on basis of the b 1Σg+(v '=2)← X 3Σg-(v″=0) absorption transition of molecular oxygen and the S 1, ν'←S 0 absorption spectrum of gaseous azulene at its vapour pressure at room temperature.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- April 2003
- DOI:
- 10.1016/S0009-2614(03)00263-X
- Bibcode:
- 2003CPL...371..284F