Up-Scaling the Power of Pulsed Single Frequency Fibre Amplifiers for Coherent LIDAR Applications

François Gustave (1) , Pierre Bourdon (1) , Julien Le Gouët (1) , Anne Durécu (1) , Laurent Lombard (1) , Hermence Jacqmin (1) , Agnès Dolfi-Bouteyre (1)

1 DOTA, ONERA, Université Paris Saclay (COmUE) [Palaiseau]

In optical sensing applications, the laser sources are strongly constrained by the sensing system requirements. In the case of coherent LIDARs, that measure wind speed thanks to the Doppler shift (by means of a coherent detection), highly coherent high power pulsed lasers with good output beam quality are necessary to guarantee a proper measurement over long distances. The pulsed emission ensures the spatial resolution along the line of sight whereas the high coherence accounts for the wind speed resolution (measured in the frequency domain). Thus, the challenge when designing laser sources for such instruments resides in the difficulty of improving the output power while not altering the other characteristics.

Mots clés: COHERENT LIDAR; OPTICAL SENSING; DOPPLER SHIFT; PULSED SINGLE FREQUENCY FIBRE AMPLIFIER

Mots clés: SBS; LASER FIBRE; AMPLIFICATEUR FIBRE; HAUTE PUISSANCE

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]

François Gustave, Pierre Bourdon, Julien Le Gouët, Anne Durécu, Laurent Lombard, et al.. Up-Scaling the Power of Pulsed Single Frequency Fibre Amplifiers for Coherent LIDAR Applications. CLEO EUROPE 2019, Jun 2019, MUNICH, Germany. ⟨10.1109/CLEOE-EQEC.2019.8871493⟩. ⟨hal-02397208⟩