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Diode-laser-based direct-detection Doppler wind lidar: design and initial results
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DOI：10.1364/AO.589956.png)
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Abstract
En 中文
Wind measurements are essential for weather forecasting and atmospheric research on all spatial and temporal scales. Despite its importance, few instruments can provide clear-air wind velocity profiles spanning both the planetary boundary layer and the free troposphere. Creating a lidar system that works in both regions is difficult, as coherent systems depend on aerosols, which are often absent in the free troposphere, while many direct-detection systems have systematic errors caused by aerosol optical properties that are not known a priori. This paper presents the initial results of a diode-laser-based direct-detection Doppler wind lidar (DWL) operating at 780 nm that uses the double-edge technique and leverages ancillary measurements of the backscatter ratio. The system uses a frequency-stabilized diode laser in a master oscillator power amplifier configuration with a tapered amplifier, producing 6.25 & micro;J pulses at 8 kHz (50 mW average power). Horizontal testing showed a mean bias of 0.17 m/s and a standard deviation of 1.5 m/s in the retrieved radial velocity compared to an anemometer, using bin sizes of 5 min and 37.5 m. Vertical testing demonstrated that the DWL could retrieve wind velocities with +/- 1 sigma random uncertainties of less than 3 m/s from approximately 500 m to 10.5 km at night and 500 m to at least 4.5 km during the day in clear-sky conditions, with a bin size of 15 min and 150 m. A time-varying systematic bias was also observed, changing by approximately 2 m/s over the 17 day measurement period. These results demonstrate the feasibility of the prototype DWL for measuring wind in both the planetary boundary layer and the free troposphere. (c) 2026 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keywords:
SPECTRAL-RESOLUTION LIDAR
RAYLEIGH-BRILLOUIN SCATTERING
DIFFERENTIAL ABSORPTION
WATER-VAPOR
TEMPERATURE-MEASUREMENTS
EDGE TECHNIQUE
FABRY-PEROT
SYSTEM
AIRBORNE
FIELD
Journal
A
IF:
1.7
Papers:
798
Citations:
5.1W
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