Fiber Laser Phased Array for Deep-Space Information Transmission

Abstract

In this paper, the technology of deep space laser communication and all optical networking based on fiber laser phased array using dynamic connection is proposed. The link power in deep space laser communication from 40 000 km to 35 000 km are simulated. Because the limit of saturation output of erbium-doped fiber amplifier, the safety margin using 1.55 μm laser is much lower than that of 1.064 μm. The far field intensity distribution of 1.064 μm fiber laser phased array in deep space is simulated. It is found that the scanning angle range is different with distance between two adjacent elements. With a 20×20 array, fiber core radius and distance between two adjacent elements are 10 μm and 20 μm respectively, the scanning angle range is ±1.309°. Therefore, the fiber laser phased array of the light source at 1.064 μm is more suitable for deep space communication systems. This study provide a theoretical basis for the realization of a dynamic link for laser phased communication.

Keywords

deep space communications / fiber laser phased array / the scanning range / dynamic link / all optical network