Frans Harren

Photo of Frans Harren

Frans J. M. Harren is Associate Professor at Radboud University, Nijmegen (the Netherlands). His research focuses on the reliable state-of-the-art sensing of minute quantities of trace gases in complicated gas mixtures, online, noninvasive, with high selectivity and detection speed. For this, photoacoustic frequency modulation, and cavity-enhanced spectroscopy are combined with quantum cascade lasers, optical parametric oscillators, and frequency comb lasers. These methods are applied within biology, agro technology, and medical sciences.

Atomic and Molecular Physics

Viewpoint: Ultrasensitive Absorption Spectroscopy

Absorption spectroscopy limited only by quantum noise has been demonstrated over a broad frequency range using laser frequency combs. Read More »