FC-MIRL

Widely tuneable SI-traceable frequency comb-stabilized mid-infrared lasers for Earth system science and precise measurements in fundamental physics



Résumé
Recent advances in frequency metrology and laser and fibre technology have made ultra-high resolution molecular spectroscopy an interdisciplinary field with far-reaching applications, ranging from fundamental physics to Earth and planetary science, astrophysics and cosmology. Stabilizing mid-IR lasers on frequency combs with traceability to primary standards is a particularly interesting frontier technology. While the quest for ultimate frequency control is obvious for fundamental physics applications, Earth observations have the same requirement, since molecular remote sensing measurements are restrained by the quality of spectroscopic data, due to the limited resolution of traditional spectrometers. The techniques developed at Laboratoire de Physique des Lasers (LPL) can be used for atmospheric and Earth science applications, but currently suffer from limited frequency tuneability. This collaboration between LPL and LERMA (Laboratoire d’Études du Rayonnement et de la Matière en Astrophysique et Atmosphères) is dedicated to obtaining extended tuning ranges up to ~100 GHz to allow rovibrational branches to be well covered at unprecedented precision. This will greatly improve the versatility of comb stabilized mid-IR lasers which is crucial for both fundamental and atmospheric applications.

Mots-clés
Mid-infrared laser spectroscopy, Atmospheric physics, Quantum cascade laser, High-resolution spectroscopic techniques, Frequency metrology

Partenaires du projet

INP
DARQUIE Benoît
Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères (UMR7538) Villetaneuse France
INSU
Janssen Christof
Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères (UMR8112) France
Nicolas Cahuzac
Crédit photo : Nicolas Cahuzac