13 February 2001 1.5-μm eye-safe coherent lidar system for wind velocity measurement
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Abstract
A coherent lidar is an attractive sensor for atmospheric observation because it enables the wind velocity measurement in clear air conditions. A 1.5-?m eye-safe coherent lidar is more attractive than a 2-?m eye-safe coherent lidar. The wavelength of 1.5-?m provides a ten times higher maximum permissible exposure for human eyes than the wavelength of 2-?m. In addition, optical fiber components and devices developed for optical fiber communications are easily available. We have already reported first 1.5-?m coherent lidar system for wind velocity measurement, and recently completed the full system. The system has the Er,Yb:Glass pulsed laser with the output energy 10.9-mJ and the telescope with effective aperture of 100-mm. The system provides the available measurement range of 5-km (SNR>+1-dB), the detectable wind velocity range of between -50- m/sec and +50-m/sec and the range resolution of 30-m. The velocity accuracy of 0.14-m/sec (standard deviation) is obtained by measuring velocity of a nonmoving hard target.
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Kimio Asaka, Kimio Asaka, Takayuki Yanagisawa, Takayuki Yanagisawa, Yoshihito Hirano, Yoshihito Hirano, } "1.5-μm eye-safe coherent lidar system for wind velocity measurement", Proc. SPIE 4153, Lidar Remote Sensing for Industry and Environment Monitoring, (13 February 2001); doi: 10.1117/12.417063; https://doi.org/10.1117/12.417063
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