Study On Pumping Light Field Uniformity Of LD-side-pumped Nd: YAG Laser

In this paper,both the physics model and mathematic model of the pump power absorption and distribution in the LD side-pumped solid state laser medium are set up. The pump power distribution in the single diode directly pumped laser rod with different pumped parameters is simulated using the method of ray trace. A method to estimate the distribution of pump power is bring up.The effect of the different active medium's absorption coefficient , distance between thediode and the laser rod , radius of laser rod and thickness of water collar on the pump powerdistribution in the laser rod is studied under the condition of the laser rod both with cooling system and without cooling system. Finally, optimum parameters are got both in LD side-pumped Nd: YAG laser in which Condenser chamber is in double arched style and LD side-pumped Nd:YAG laser in three direction with water cool system , and the Gauss distribution of the pump power in the two systems with those optimum parameters are got.