A novel 2 µm, frequency conversion based, laser transmitter for CO2 DIAL

M. Raybaut; A. Godard; A. K. Mohamed; M. Lefebvre; F. Marnas; P. Flamant; A. Bohman; P. Geiser; P. Kaspersen

doi:10.1117/12.830285

9 October 2009 A novel 2 μm, frequency conversion based, laser transmitter for CO₂ DIAL

M. Raybaut, A. Godard, A. K. Mohamed, M. Lefebvre, F. Marnas, P. Flamant, A. Bohman, P. Geiser, P. Kaspersen

Proceedings Volume 7479, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing V; 74790G (2009) https://doi.org/10.1117/12.830285
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

We report on a novel 2 μm laser transmitter for CO₂ DIAL, based on a nanosecond parametric master oscillator-power amplifier architecture. The master oscillator is an entangled-cavity, doubly resonant, optical parametric oscillator, based on a type-II periodically poled Lithium Niobate nonlinear crystal. This device provides single-longitudinal-mode radiation, with a high frequency stability and high beam quality, with no need of an additional seeding source. The 2.05 μm signal emission is amplified by multi-stage parametric amplifiers to generate more than 10 mJ. After amplification, both the spectral purity and beam quality are maintained: we demonstrate single-longitudinal-mode emission with a frequency stability better than 3 MHz rms, within a nearly diffraction limited beam, with a M² quality factor close to 1.5. The unique performances of this parametric architecture make this device a relevant transmitter for CO₂ differential-absorption LIDAR. Such approach could be readily duplicated for the detection of other greenhouse gases.

Citation Download Citation

M. Raybaut, A. Godard, A. K. Mohamed, M. Lefebvre, F. Marnas, P. Flamant, A. Bohman, P. Geiser, and P. Kaspersen "A novel 2 μm, frequency conversion based, laser transmitter for CO₂ DIAL", Proc. SPIE 7479, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing V, 74790G (9 October 2009); https://doi.org/10.1117/12.830285

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