This is about my recerch. Would someone correct mistake of grammar? Laser-Ablation Propulsion ・Background Laser propulsion has advantages when compared with existing propulsion method which has to board its propellant, because energy for propulsion is send by laser beam remotely. It is expected that remote impulse generation enables space debris re-entry and remote satellite attitude correction. ・Object Recently, space debris come from retired satellite or upper stage of rocket has been increasing with the growth of space exploration, and it is becoming a problem for safety. One of the promising solutions for this problem is re-entry by laser-ablation. When high power laser strikes space debris on the low-Earth-orbit, impulse is generated by ablation jet. Debris can be decelerated by this impulse, and re-enter to the atmosphere. In this laboratory, we research the impulse characteristics that determined by the condition of laser or surface of target. ・Research We measure the impulse generated by laser ablation by micro-impulse stand using pendulum, and research its impulse characteristics.