In-orbit test, verification and surveillance of the laser communication system

To perform the in-orbit test, verification and surveillance task, the laser simulation and test station must be constructed. Cooperated with the fixed laser communication ground station, we can not only test the main specifications of the laser communication terminals, but also test the performances of the laser backbone link. In this paper, we first give the basic theory of the in-orbit test. Then designed the laser simulation and test station, which consists of laser transmitter module, laser receiver module, and general test module. In the GEO-to-LEO laser communication terminal test progress, the laser simulation and test station responsible for the simulation of the LEO laser communication terminal. In the LEO-GEO-Ground laser link performance test progress, the laser simulation and test station simulate the LEO satellite, which transfer high date rate data flow to GEO satellite, then the GEO satellite route the data flow to the GEO-to-Ground laser communication terminal through optical router, finally GEO satellite transfer the LEO data down to fixed laser receiver on ground.