Abstract
The experimental evidence of the decreased heterodyne-detection efficiency caused by the lag-angle is shown using a long-range wind sensing coherent Doppler lidar (CDL) with fast beam scanning. The recovery of the efficiency with the lag-angle compensation is also demonstrated. The receiving beam alignment method synchronized with the beam scanner is used. The measurable range of 12 km with the fast beam scanning of 20 deg/s in the case of 8 Hz line-of-sight (LOS) update rate was demonstrated with the compensation. This demonstration shows the potential for the wind sensing CDL to satisfy the all requirements of long-range, real-time, and fast beam scanning measurement.
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