关键词: 激光推进;耦合系数;比冲;轨道

Abstract: The laser thruster design is one of the key issues for laser propulsion technology.A concept of omni-directional receiving dual-beam laser engine(ODLE) together with its configuration design is proposed.ODLE is noted for its features as follows.The optical system is completely separated from the thrust system.The incident laser beams are reflected into the thrust chamber by the optics only twice,so the beam energy loss is small.The optical system can be adjusted in all direction to track the incident laser beams,ensuring its wide applications in various kinds of launching trajectories.The adoption of the dual-beam single-or double-engine configuration can reduce 50% of the power requirement for each laser,and a smooth laser relay can be carried out if needed during the launching process.Launch plans into the Low Earth Orbit(LEO) with ODLE was proposed.The simulated results indicate that higher momentum coupling coefficient is the best choice to launch into the LEO.

Key words: Laser propulsion;Coupling coefficient;Specific impulse;Orbit