Lidar-radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied optics Année : 2013

Lidar-radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser.

Marco Romanelli
Jérémie Thévenin
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Lihua Wang
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Marc Brunel

Résumé

An rf-modulated pulse train from a passively Q-switched Nd:YAG laser has been generated using an extra-cavity acousto-optic modulator. The rf modulation reproduces the spectral quality of the local oscillator. It leads to a high pulse-to-pulse phase coherence, i.e., phase memory, over thousands of pulses. The potentialities of this transmitter for lidar-radar are demonstrated by performing Doppler velocimetry on indoor moving targets. The experimental results are in good agreement with a model based on elementary signal processing theory. In particular, we show experimentally and theoretically that lidar-radar is a promising technique that allows discrimination between translation and rotation movements. Being independent of the laser internal dynamics, this scheme can be applied to any Q-switched laser.
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Dates et versions

hal-00854261 , version 1 (06-12-2013)

Identifiants

Citer

Marc Vallet, Jonathan Barreaux, Marco Romanelli, Grégoire Pillet, Jérémie Thévenin, et al.. Lidar-radar velocimetry using a pulse-to-pulse coherent rf-modulated Q-switched laser.. Applied optics, 2013, 52 (22), pp.5402-10. ⟨10.1364/AO.52.005402⟩. ⟨hal-00854261⟩
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