Abstract
Atmospheric dual-band Scheimpflug lidar is demonstrated at 980 and 1550 nm. Signals are compared during three weather conditions, and the spatio-temporal resolution of the atmospheric structure is considered. The potential for aerosol classification is evaluated, and future directions are discussed.
Highlights
In this report we show how atmospheric echoes can be retrieved in the SWIR range using the Scheimpflug lidar method
Scheimpflug SWIR lidar can potentially map these species at high spatio-temporal resolution which can be realized with narrow-band seeded fiber amplifiers [10]
A dual bandpass filter is installed in front of the detector, but because of a mismatch the system was operated without filters
Summary
In recent years we have developed the Scheimpflug lidar concept [1]. We have demonstrated the implementation for modulation spectroscopy on aerofauna [2], multiband aerosol monitoring [3, 4], polarimetric differential absorption lidar [5] and fluorescence and Raman lidar [6]. Whereas signal decays by r-2 and range resolution is constant in ToF lidar, this is the opposite for Scheimpflug lidar. Eumelanin is the most common pigment of the aerofauna, but because of its dull absorption spectrum (λ-3.48 from 280 to 1064 nm) it is challenging to quantify without positioning a λoff band in the SWIR region. This method could potentially quantify melanization as function of wingbeat with kHz sampling [9]. Scheimpflug SWIR lidar can potentially map these species at high spatio-temporal resolution which can be realized with narrow-band seeded fiber amplifiers [10]
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