CuBr激光放电管声波共振现象的研究

Acoustic wave resonance in CuBr laser discharge tube

为了使有广泛应用的CuBr激光器能稳定和高效运行,针对实验中出现的激光输出功率随放电频率起伏的情况,给出CuBr激光放电管内声波振动的数学模型。该模型选取圆柱形放电管轴为柱坐标轴对波动方程求解,通过数值计算,获得了放电管内声压分布的解析表达式。通过分析放电频率与激光管固有声振动频率的关系,明确了声共振会导致激光介质重新分布,它对激光输出功率有影响,理论计算结果和实验结果完全符合。

A model of acoustic oscillations was presented for the CuBr laser discharge tube. An analytical expression of the acoustic waves was given. The relation between natural frequency and discharge frequency was described. It is found that the acoustic oscillations lead to the redistribution of the laser medium in the discharge tube, which influences laser output power.