无声放电辅助激励CO2激光器的研究

用具有扁平放电截面的等离子体管设计一种新颖的 CO2 激光器 ,并用纵向辉光放电和横向无声放电同时激励。阐述了这种激光器的设计原理 ,理论上讨论了激光管内电子浓度的横向分布 ,实验研究了它的工作特性 ,并与仅用辉光放电激励的情况进行比较。实验表明 ,由于横向无声放电的作用使这种激光器的激光功率、工作气压和工作气体中氮的比例有明显的提高 ,激光效率也有所提高 ,而且放电电流能兼顾最大激光输出功率和最佳效率。

Investigation of CO2 Laser Assisted by Silent Discharge

A new type of CO2 laser tube has been designed by using a plasma tube having rectangular discharge cross- section and is excited by both the axial glow discharge and the transverse silent discharge.In this paper,the principle of design is described and the transverse distribution of electron concentration in the laser tube is discussed theoretically.Furthermore,its working characteristics are studied experimentally and compared with those excited by the only DC glow discharge. Under the action of transverse silent discharge,the laser power,the gas- filled pressure and the fraction of N2 in the laser are increased obviously,the laser efficiency is increased,too.Both the laser power and efficiency can be simultaneously optimized by choicing the discharge current.