Recently, the University of Science and Technology of China has realized the first dual-frequency Doppler wind-laser laser pointer radar based on a superconducting nanowire single photon detector for the first time in the world. The platform is running. Wind measurement lidar has a wide range of social benefits. For example, accurate atmospheric wind field data can be used for traceability and forecast of atmospheric pollution, aviation meteorological support, meteorological and climatological research, wind power system management, and military applications.
However, when shorter laser pulses are used to improve the range resolution of Doppler lidar, the coherence efficiency of traditional coherent detection lidar will decrease, and real-time data acquisition and processing will face huge challenges. The new dual-frequency Doppler wind measuring lidar uses a streamlined optical structure to achieve high system stability and improve practicality and reliability. In the laboratory, the system has a repeatable measurement error of less than 0.2 m / s for 10 days.
In comparison experiments, the average errors of wind speed and direction were less than 0.1 m / s and 1 degree, respectively. The radar operates at 1548.1 nanometers. This infrared wavelength allows the human eye to have the highest exposure power, the best atmospheric transmittance, and a low background of solar and sky radiation. At the same time, the green laser pointer optoelectronic integrated device is mature, does not require repeated calibration, and can be installed separately. Therefore, it is suitable for running on platforms with large temperature differences and strong vibrations such as airborne, shipborne, and spaceborne.