Abstract
We demonstrate experimentally the first range-resolved detection and identification of biological aerosols in the air by non-linear lidar. Ultra-short terawatt laser pulses are used to induce two-photon-excited fluorescence (2PEF) in riboflavin-containing particles at a remote location. We show that, in the case of amino acid detection, 2PEF-lidar should be more efficient than linear 1PEF-lidar beyond a typical distance of 2 km, because it takes advantage of the higher atmospheric transmission at the excitation wavelengths. 2PEF-lidar moreover allows size measurement by pump–probe schemes, and pulse shaping may improve the detection selectivity.
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33.50.-j; 33.80.Wz; 42.65.-k; 42.68.Wt; 92.60.Mt
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Méjean, G., Kasparian, J., Yu, J. et al. Remote detection and identification of biological aerosols using a femtosecond terawatt lidar system. Appl Phys B 78, 535–537 (2004). https://doi.org/10.1007/s00340-004-1466-x
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DOI: https://doi.org/10.1007/s00340-004-1466-x