Petermann, C., Beigang, R.,APPLIED PHYSICS LETTERS, 100(6), 2012 (article)
Petermann, C.,DE Gruyter, 79(1), 2012, Best paper award OPTO 2011 (article)
A new coupling scheme for cavity enhanced absorption spectroscopy makes use of an intracavity acousto-optical modulator to actively switch light into (and out of) a resonator. This allows cavity ringdown spectroscopy (CRDS) to be implemented with broadband temporally incoherent light sources with low spectral power densities. The method is demonstrated for the first time using a broadband supercontinuum source. Best paper award OPTO 2011.