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  • 37- Gas detection using parametric sources

    Antoine Godard is Senior Research Scientist at ONERA Palaiseau, France

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    Cet épisode fait partie du podcast Parametric Nonlinear Optics

    • 06 Feb 2017 11:54:45
    • Benoit Boulanger and Patricia Segonds
    • 01 h 53 min
    • 1326.06 Mo
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    This lecture provides a presentation of the various schemes of optical parametric sources for gas sensing applications. After an overview of the active optical gas sensing techniques, it aims at giving the relevant approaches to implement parametric sources in the different temporal regimes. Each case is illustrated by practical application examples from the literature and its pros and cons are discussed. The outline of the lecture is the following: • Infrared absorption of gases • Optical fingerprints of molecules • Why parametric sources are relevant? • Overview of active optical gas sensing techniques • Techniques for local sensing • Techniques for standoff detection • CW parametric sources for gas sensing • DFG sources • CW OPOs • Pulsed parametric sources for gas sensing • OPG • Problematic of OPO linewidth in pulsed regime • Injection-seeded OPOs • Line-narrowing with intracavity spectrally selective elements • Vernier spectral filtering • Mode-locked OPOs for gas sensing • Synchronously pumped OPOs

    Optical parametric sources, gas sensing, absorption spectroscopy, differential absorption lidar

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