Reseatch On High-power Double Clad Er-Yb Co-doped Fiber Laser

As a hot topic in the research and development of optical communication technology, high-power fiber laser is an important direction on the development and application of lasers. Double-clad fiber technology and pumping optical coupling technology have significantly increased the output power and the conversion efficiency of the fiber laser, which has become one of the important approaches of developing high-power lasers. High-power double-clad Er3+-Yb3+co-doped fiber laser has many merits such as compact size, simple structure, high efficiency and long service life, etc.. Therefore, the research on high-power double-clad Er3+-Yb3+co-doped fiber laser has become one of the hot researches among colleges, universities and research institutions.This paper focuses on the numerical simulation of the high-power double-clad Er3+-Yb3+co-doped fiber laser in the steady state. At first, the thesis briefly describes the research of current situation, the development and the new applications. Then the thesis provides the detailed analysis on double-clad Er3+-YbJ+co-doped fiber laser theory. Next, the thesis explains prominently the key technologies of the double-clad Er3+-Yb3+co-doped fiber laser. Finally, with the power transfer rate equation, the thesis does the numerical simulation research on the major features of the fiber laser in the steady-state. According to the simulation results, in the same pumping mode the distribution of the pump power and the laser power is the same; the length of the fiber has an obvious influence on the output power; the optimum length of the optical fiber is proportional to the pump power; when the back cavity mirror reflectivity remains unchanged, the output power will increase with the increase of the pump power.