Modeling Of A Diode Transverse Pumped Cs Vapor Laser MOPA System

Compared with solid and chemical lasers, diode pumped alkali vapor lasers (DPALs) have many desirable features such as high quantum effect, good beam quality, the gas medium flows easily, less waste heat, safety and reliability. In the field of military, aerospace and laser processing, DPALs have great advantages and development prospects. In recent years, scientists in the world did many research works on DPALs and achieved great results. In pursuit of high power, people do a lot of work on pump sources, the structure of the pumping, the buffer gas and so on. At present, there are less publications on kinetic processes and experimental results of high power transverse pumped alkali vapor lasers.It is significant to do the research on high power transverse pumped alkali vapor laser dynamics.This paper first briefly introduces the development of DPALs, the research progress, the typical dynamic model and the MOPA systems based on DPALs. By analyzing the kinetic processes, the technical routes and the experimental progress on DPALs, we establish a physical model to describe the kinetic progress and the lasing mechanism of a high power transverse pumped Cs vapor laser MOPA system. Dependences of the buffer gas, the working temperature, the seed power and the size of the cell on the laser output performance are calculated and analyzed. A set of optimal parameters are obtained for efficient operation of the MOPA system. At the same time, we simulate the distribution of the pump power in the pool. As the result, the pump power is nonlinear absorbed, which agrees well with the experimental results in literatures. In the diode pumped Rb vapor laser experiment, we explored how the pump power, the temperature and the place of the cell effect on the output laser.