连续运转Ar~+激光器的最佳气压分析

本文从 Tonks-Langmuir 低气压放电正柱理论出发,推导氩离子激光器输出功率和充气压力的关系,由此求得最佳气压,讨论了最佳气压的影响因素,并与实验结果相比较。

Analysis of optimum gas pressure in CW argon ion lasers

As Tonks-Langmuir lower pressure discharge plasma theory is compared with the operating condition of typical Ar~+ lasers,it is considered that this theory may be adaptive for the analysis of plasma parameters in Ar~+ lasers.It is believed that the two-step process plays an essential role in the excitation mechanism of CW Ar~+ lasers.Consequently,the dependenoe of the upper laser level population, which is in approximate proportion to laser output,on the filling-gas pressure in CW Ar~+ lasers is derived.The optimum pressure and electric temperature can then be determined.This result is in agreement with the experiment by H.Beorseh et al.The deviation between theoretical and experimental results in increasing pressure is explained.Some influential factors for determination of the optimum pressure are also discussed.