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研究了一种实现新放电方法:诱导圆筒放电的可能性。该放电方法基于不同的粒子数反转机理,使用不同的原子和分子传能模式泵浦气体激光器。研制了用于气体中的脉冲诱导圆筒放电(脉冲感应耦合等离子体)激励系统,并对其进行了实验研究。首次实现了基于原子和分子不同传能模式的4种脉冲诱导激光器,其激励特性是光束发散角小,不同脉冲间的非稳定性在1%以内。首先研制出了基于F原子电子传能模式的红光激光器,这一激光器使用脉冲感应圆筒放电;通过在2.66~46.55 kPa气压下激励He-F2(NF3,SF6)混合气获得了在624~755 nm波段的8种波长的输出;FI激光器的脉冲能量为2.6 mJ,脉冲持续时间为80 ns,光束发散角为0.4 mrad。同时研制出了基于基态CO2分子传能的10.6μm远红外激光器,该感应激光器在脉冲持续时间(FWHM)为160μs时,获得的最大能量为152 mJ。另外,研制出了近远红外区的基于氢气分子中电子传能的脉冲感应放电氢气激光器,激射谱线为0.835,0.89,1.116和1.122μm,脉冲持续时间为20 ns时获得的脉冲峰值功率为11 kW。最后成功研制了波长为337.1 nm和357.7 nm的基于自限制电子传能过程C3u→B3g的脉冲感应紫外氮气激光器,在低压为133 Pa的感应氮气激光器中获得的最大能量输出为4.5 mJ,峰值功率为300 kW,脉冲持续时间为(15±1)ns,测得的感应氮气激光器的光束发散角为0.3 mrad。
A new discharge method was investigated: the possibility of inducing a cylinder discharge. The discharge method is based on different particle number inversion mechanisms that use different atomic and molecular energy transfer modes to pump gas lasers. A pulse-induced cylindrical discharge (pulse-induced coupled plasma) excitation system for gas was developed and experimentally studied. For the first time, four kinds of impulse induced lasers based on different modes of energy transfer between atoms and molecules were realized. Their excitation characteristics were that the beam divergence angle was small and the instability between different pulses was within 1%. Firstly, a red laser based on the F atom electron energy transfer mode was developed. The laser was pulsed with a pulsed induction cylinder. The mixed gas of He-F2 (NF3, SF6) was excited at a pressure of 2.66 ~ 46.55 kPa, 755 nm band 8-wavelength output; FI laser pulse energy of 2.6 mJ, pulse duration of 80 ns, beam divergence of 0.4 mrad. At the same time, a 10.6μm far-infrared laser based on the ground-state CO2 molecular energy transfer was developed. The maximum energy of the induced laser was 152 mJ when the pulse duration (FWHM) was 160μs. In addition, a pulsed inductively-discharge hydrogen laser based on electron energy transfer in hydrogen molecules was developed in the near and far infrared regions. The peak power of pulsed laser was 0.835, 0.89, 1.161 and 1.122μm, and the pulse duration was 20 ns It is 11 kW. Finally, pulse induced UV nitrogen lasers based on self-limiting electron energy transfer process C3u → B3g at 337.1 nm and 357.7 nm were successfully developed. The maximum energy output of the induced nitrogen laser at 133 Pa was 4.5 mJ and the peak power Is 300 kW with a pulse duration of (15 ± 1) ns and a measured beam divergence of 0.3 mrad for an induction nitrogen laser.