Laser light beam transmit efficiency and accuracy in atmosphere channel is important parts in space laser communication system. The atmosphere channel effects to laser light beam mainly have two aspects, atmospheric attenuation and atmospheric turbulence. After doing related experiments, we figure that the speed of wind has little effect to atmospheric turbulence and the altitude is portional to structure parameter. And bad weather has much influence with energy transmission efficiency. In practical situation, we should consider two ways working at the same time refer to our conclusions.

The optical properties is essential to the process of identification in Laser Identification Friend or Foe (Laser-IFF) system. The corner cube reflector (CCR), composed of three mutually orthogonal reflective micromirrors, is extensively used in Laser-IFF system for it can reflect incident light at any angle to its incoming direction. So the micromachined CCR array is set to be the most important component of the responder. And assuming the Laser-IFF system is used in missiles, we present an analysis of the optical properties about the responder sectional area, the signal power of the responder and the echo power from the responder to the inquirer, considering at different effect distances between the inquirer and responder, divergence half-angle, CCR arrays reflectivity and other factors. Further field testing about the system can reference obtained experimental results and conclusions.