EGUsphere EGUsphere EGUsphere EGUsphere Copernicus Publications Göttingen, Germany 10.5194/egusphere-2026-2631 Raman source using a hollow-core fiber for ozone monitoring in the lower troposphere Weinzaepflen Joris 1 2 3 Ravetta François https://orcid.org/0000-0002-4264-6235 1 Victori Stéphane https://orcid.org/0000-0003-3045-2377 2 Ancellet Gérard https://orcid.org/0000-0002-1542-6085 1 Cailteau-Fischbach Cristelle https://orcid.org/0009-0002-0549-6087 1 4 Mariage Vincent 1 Delahaye Frédéric 5 Gérôme Frédéric https://orcid.org/0000-0001-9213-2876 5 6 Benabid Fetah 5 6 Laboratoire Atmosphères et Observations Spatiales (LATMOS) / Institut Pierre-Simon Laplace (IPSL), Sorbonne Université, Université Versailles Saint-Quentin, CNRS, 4 place Jussieu 75252 Paris, France CIMEL Electronique, 172 rue de Charonne - 75011 Paris, France Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, 2 Av. Augustin Fresnel 91127 Palaiseau, France Sorbonne Université, CNRS, UAR OMA Terra, Observatoire des Sciences de l’Univers Ecce Terra, Paris Cedex 5, France GLOphotonics, 123 Avenue Albert Thomas, Limoges 87060, France GPPMM Group Xlim, 123 Avenue Albert Thomas Limoges, 87060, France 04 08 2026 2026 1 17 Copyright: © 2026 Joris Weinzaepflen et al. 2026 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-2631/ The full text article is available as a PDF file from https://egusphere.copernicus.org/preprints/2026/egusphere-2026-2631/egusphere-2026-2631.pdf

The DIfferential Absorption microlidar for Boundary Layer Ozone (DIABLO) is designed for boundary-layer profiling. This instrument uses a diode-pumped, passively Q-switched Nd:YAG laser at 266 nm, coupled to a deuterium-filled hollow-core fiber (HCF) to generate the 289 nm Stokes wavelength via stimulated Raman scattering (SRS). The high Raman gain in the gas-filled HCF enables efficient UV conversion with significantly lower pump energy than required in traditional free-space Raman cells. At the output of the fiber, 1-ns pulses of 10 <em>&mu;</em>J at 266 nm and 7 <em>&mu;</em>J at 289 nm are obtained with a repetition rate of 1 kHz. First atmospheric measurements in central Paris provide ozone concentrations between 400 m and 1700 m. In contrast with existing UV DIAL ozone systems, which are typically bulky, complex, and operated in campaign-based research configurations, DIABLO targets a compact and low-energy architecture optimized for autonomous boundary-layer monitoring.

 Association Nationale de la Recherche et de la Technologie 2023/1612