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  1. No Access

    Article

    Mode-hop compensation for intracavity sensing via chip voltage in an external-cavity QCL

    In this paper, we describe a technique to perform intracavity gas sensing by detecting changes in the QCL voltage. The influence of mode-hops is compensated by a data acquisition and processing based on a dual...

    Laurent Bizet, Raphael Vallon, Bertrand Parvitte, Gregory Maisons… in Applied Physics B (2022)

  2. No Access

    Article

    Multi-gas sensing with quantum cascade laser array in the mid-infrared region

    Wide tunable lasers sources are useful for spectroscopy of complex molecules that have broad absorption spectra and for multiple sensing of smaller molecules. A region of interest is the mid-infrared region, w...

    Laurent Bizet, Raphael Vallon, Bertrand Parvitte, Mickael Brun… in Applied Physics B (2017)

  3. No Access

    Article

    Photoacoustic Detection of Methane in Large Concentrations with a Helmholtz Sensor: Simulation and Experimentation

    We report on the use of a photoacoustic Helmholtz sensor for the detection of large concentrations of methane. In this case, methane is in concentration where the photoacoustic signal is no more linear with co...

    Virginie Zeninari, Raphaël Vallon… in International Journal of Thermophysics (2016)

  4. No Access

    Article

    Optimization and complete characterization of a photoacoustic gas detector

    We report the complete designing process and realization of a photoacoustic spectrometer. In a first step, the cell design is optimized in order to achieve maximum cell constant and working frequency using a f...

    Christophe Risser, Bertrand Parvitte, Raphael Vallon… in Applied Physics B (2015)

  5. No Access

    Article

    Quantitative simulation of photoacoustic signals using finite element modelling software

    This paper aims to demonstrate the quantitative simulation of photoacoustic signals using finite element modelling software. The software Comsol Multiphysics is used to calculate the response of a differential...

    Bertrand Parvitte, Christophe Risser, Raphael Vallon… in Applied Physics B (2013)

  6. No Access

    Article

    Photoacoustic spectroscopy for trace gas detection with cryogenic and room-temperature continuous-wave quantum cascade lasers

    The main characteristics that a sensor must possess for trace gas detection and pollution monitoring are high sensitivity, high selectivity and the capability to perform in situ measurements. The photacoustic ...

    Virginie Zeninari, Agnès Grossel, Lilian Joly… in Central European Journal of Physics (2010)

  7. No Access

    Article

    A Case Study of CO2, CO and Particles Content Evolution in the Suburban Atmospheric Boundary Layer Using a 2-μm Doppler DIAL, a 1-μm Backscatter Lidar and an Array of In-situ Sensors

    A network of remote and in-situ sensors was deployed in a Paris suburb in order to evaluate the mesoscale evolution of the daily cycle of CO2 and related tracers in the atmospheric boundary layer (ABL) and its re...

    Fabien Gibert, Irène Xuéref-Rémy, Lilian Joly… in Boundary-Layer Meteorology (2008)

  8. No Access

    Article

    In situ Measurement of H2O and CH4 with Telecommunication Laser Diodes in the Lower Stratosphere: Dehydration and Indication of a Tropical Air Intrusion at Mid-Latitudes

    Telecommunication laser diodes emitting near 1.39 μ m and 1.65 μ m in combination with direct-differential absorption spectroscopy are efficient tools to monitor in situ stratospheric H2O andCH4 with a good preci...

    Georges Durry, Alain Hauchecorne, Joelle Ovarlez… in Journal of Atmospheric Chemistry (2002)