钙离子和溴化亚铜共振亚稳跃迁激光脉冲的研究

Investigation on Ca^+, CuBr resonance-metastable transition laser pulse

铜蒸汽激光器是一种典型的共振亚稳跃迁激光 ,通常认为其激光脉冲出现于电流脉冲的前沿。实验研究表明 ,钙离子激光脉冲在各种条件下始终在电流脉冲的前沿 ,而对于CuBr激光 ,其脉冲的延时时间与工作温度有关。由于工作物质铜原子是通过分解CuBr成为铜离子 ,再由铜离子复合成铜原子 ,故工作温度较低时 ,复合系数较大 ,造成激光脉冲的延时时间变长 ,而当工作温度较高时 ,复合系数变小 。

Cupper vapor laser is a typical resonance\|metastable transition laser. The laser\|pulse is usually thought of occuring at the front edge of current pulse. Experiment shows that Ca\++ laser pulse is always at the front edge of current pulse under different condition. As for CuBr laser, the delay time of its laser pulse is related with the working temperature. Cupper atom is formed by means of the decomposition of CuBr into Cu\++, and then recombination of Cu\++. Consequently the recombination coefficient is bigger and the delay time of laser pulse gets longer when the working temperature is lower. And the recombination coefficient turns smaller and the laser pulse occurs ahead of time when the working temperature is higher.