【作者】 左都罗； 卢宏； 谢明杰； 程祖海；

【Author】 ZUO Du-luo LU Hong XIE Ming-jie CHENG Zu-hai (State Keg Laboratory of Laser Technology,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)

【机构】 华中科技大学激光技术国家重点实验室；

【摘要】 电激励的高功率脉冲 CO₂激光器是激光推进等新兴应用的优选激光器之一。现有激光器的功率、光束质量等性能还不能满足这些应用的需求。这些性能的提高取决于高功率高压电容充电、高气压大体积均匀放电、高气压高速均匀流场和激光偕振腔等关键技术的进步。采用串联谐振开关电源技术实现了高功率高压电容充电,单模块充电电流807mA,充电电压50kV 的实验结果证实了这种方法的有效性；并且探索了电感隔离 Marx 高压脉冲发生器在高气压下大横截面积均匀放电中应用的可能性,采用该方法,将无氦工作气体的稳定工作气压由2× 10⁴Pa 提升到3×10⁴Pa,将最大单脉冲能量由64J 提高到115J。这些关键技术的进步为高功率脉冲 CO₂激光器的开发奠定了基础。更多还原

【Abstract】 Electrically excited high power pulsed CO₂ laser is one of the favorable lasers in novel applications such as laser propulsion.The performances of power and beam quality of the existed lasers cannot fulfill the requirements of these applications. The improvements of these performances are decided by the technologies of quick charging of high voltage capacitor,uniform discharge in high pressure large aperture zone,uniform flow of high pressure gas,and laser resonator,etc..The technology of serial resonant switch mode power supply realizes the quick charging of high voltage capacitor with charging current of 807 mA,charging voltage of 50kV for one unit.The inductor isolated Marx high voltage pulse generator is tested for the purpose of uniform discharge with a high pressure large aperture zone.By use of this method,the reliable working pressure of helium-free gas is increased from 2×10⁴Pa to3×10⁴Pa,and the highest pulse energy is increased from 64 J to 115J.更多还原