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研制了一种新型的预电离结构——管状预电离器,并将其应用于可调谐TEA CO2激光器。利用光栅选线方案,采用光栅谐振腔,实现了激光的调谐输出。在输出耦合率为50%、气压为40 kPa的条件下,10P(20),10R(20),9P(20),9R(20)四条谱线获得的最高电光转换效率,分别为9.5%,9.7%,9.8%,9.8%。实现了激光器的高重复频率可调谐输出运转,测量了上述4条谱线激光输出的脉冲能量及平均功率,在输出耦合率为50%、气压为30 kPa的条件下,重复频率最高可达190 Hz,此时的10P(20),10R(20),9P(20),9R(20)四线的平均功率分别为322,321,340,338 W。
A new pre-ionization structure, a tubular pre-ionizer, has been developed and applied to a tunable TEA CO2 laser. Using the grating line selection scheme, the grating resonator is used to realize the laser output tuning. The maximum electro-optical conversion efficiencies of 10P (20), 10R (20), 9P (20) and 9R (20) were obtained at the output coupling rate of 50% and the pressure of 40 kPa, respectively. 9.7%, 9.8%, 9.8%. The high repetition rate tunable output operation of the laser was realized. The pulse energy and average power of the laser output of the above four lines were measured. Under the conditions of 50% output coupling rate and 30 kPa pressure, the repetition frequency could reach 190 Hz. At this time, the average power of four lines of 10P (20), 10R (20), 9P (20) and 9R (20) are 322, 321, 340 and 338 W, respectively.