大能量长脉冲TE CO2激光器
Long-pulse TE CO2 laser with high energy
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摘要: 研制了一台基于pulser/sustainer放电技术，增益体积为2.48 L的大能量长脉冲紫外预电离TE CO2激光器。利用14 nF的pulser电容控制200 nF的sustainer电容，通过优化激光器激励电路网络参数以及张氏电极进行修正，实现了稳定的辉光放电，获得了最高达135 J的能量注入。在激光工作气体CO2,N2,He混合体积比为1∶2.5∶13，气压为40 kPa的条件下，最大激光输出脉冲能量达18.51 J，激光脉冲宽度约为30 μs，电光转换效率高达14.3％。
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关键词:
- 激光技术 /
- 长脉冲TE CO2激光器 /
- 紫外预电离 /
- pulser/sustainer放电
Abstract: A long-pulse TE CO2 laser with ultraviolet-preionization using pulser/sustainer discharge technique is presented. The laser can discharge stably with 14 nF pulser capacitance and 200 nF sustainer capacitance by optimizing the parameters of pulse forming network and amending the Chang’s profile. For an active volume of 2.48 L, a gas mixture ratio of CO2, N2, He is 1∶2.5∶13 and the gas pressure of 40 kPa, the maximum output laser energy of 18.51 J with a pulse width of 32 μs is obtained at an efficiency of 14.3%. -
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