Eyesafe laser radar for aircraft detection used for the satellite laser ranging

摘要

One of the most important issues in automation of Satellite Laser Ranging (SLR), a Laser Radar for the application of geo-science and Space positioning is the eye safety of the laser. The typical laser used in SLR has a mode-locked high-power laser, of a class 3B or more, and has potentials of dangerous exposure in the beam out of the telescope. In the project of Crustal Deformation Monitoring system for the Tokyo Metropolitan area (KSP project) we have developed an infrared (eyesafe region of wavelength: 1.5um) aircraft detection laser as a second laser superimposed in the ranging laser to prevent the laser beam from contacting aircraft personnel.