9 October 2009 A novel 2 μm, frequency conversion based, laser transmitter for CO2 DIAL
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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.
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M. Raybaut, M. Raybaut, A. Godard, A. Godard, A. K. Mohamed, A. K. Mohamed, M. Lefebvre, M. Lefebvre, F. Marnas, F. Marnas, P. Flamant, P. Flamant, A. Bohman, A. Bohman, P. Geiser, P. Geiser, P. Kaspersen, 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); doi: 10.1117/12.830285; https://doi.org/10.1117/12.830285
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