Estimation of the atmospheric structure parameters using scintillation of three-color laser beams launched horizontally in the atmosphere

摘要

2μm laser is expected as a light source of space optical communication system because of its eye-safe performance. However scintillation caused by atmospheric turbulence may affect the information quality to such the open air system. Although the effect of the atmospheric turbulence to the visible light has almost become clear, to the infrared light, especially 2μm light, it has not understood yet. So we carried out all-day experiments under several weather conditions to presume the atmospheric structure parameters by using scintillation of three-color laser beams, 660nm, 789nm, and 1310nm, and estimated the refractive-index structure parameter of 2μm -laser beams.