An efficient calibration method has been developed for broad-bandwidth cavity enhanced absorption spectroscopy. The calibration is performed using phase shift cavity ring-down spectroscopy, which is conveniently implemented through use of an acousto-optic tunable filter (AOTF). The AOTF permits a narrowband portion of the SC spectrum to be scanned over the full high-reflectivity bandwidth of the cavity mirrors. After calibration the AOTF is switched off and broad-bandwidth CEAS can be performed with the same light source without any loss of alignment to the set-up. We demonstrate the merits of the method by probing transitions of oxygen molecules O2 and collisional pairs of oxygen molecules (O2)2 in the visible spectral range. © 2010 Springer-Verlag.
CITATION STYLE
Laurila, T., Burns, I. S., Hult, J., Miller, J. H., & Kaminski, C. F. (2011). A calibration method for broad-bandwidth cavity enhanced absorption spectroscopy performed with supercontinuum radiation. In Applied Physics B: Lasers and Optics (Vol. 102, pp. 271–278). https://doi.org/10.1007/s00340-010-4044-4
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