We report on the development of a DIfferential Absorption Lidar (DIAL) with coherent detection using a hybrid fiber/bulk laser for CO2 and wind measurement at 2.05 µm. Peak power is limited at 0.6 kW by Stimulated Brillouin Scattering in the fibered part. A Ho:YLF bulk amplifier allows to overcome this limitation, providing 12-19 dB additional gain depending on the pulse repetition frequency. The hybrid fiber/bulk architecture delivers laser pulses of 1.5 mJ, 200 ns at 20 kHz (30 W average power). The architecture provides easy tunability on pulse repetition frequency, duration, and wavelength emission around the absorption line. This flexibility allows for the adjustment of the compromise between measurement range and precision. Firsts measurements of CO2 Volume Mixing Ratio (VMR) and wind speed are currently being carried out. Then, the system will be used to measure CO2 emissions from thermal plants and atmospheric CO2 fluxes using eddy covariance calculations.

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