Li Hongda, I. N. Konovalov, Yu. N. Panchenko, A. V. Puchikin, M. V. Andreev, S. M. Bobrovnikov
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引用次数: 0
摘要
摘要 提出了一种在交变磁场中通过纵向放电泵浦脉冲 CO2 激光器的独创技术。在此基础上设计了一种小型 CO2 激光器，其有效介质长度为 200 毫米，脉冲能量为 30 毫焦，效率为 3.4%。研究表明，限制小型激光器产生能量的主要因素是纵向放电管横截面上的电流不稳定性。我们注意到，当 CO2 : N2 : H2 : He 混合气体的压力增加到 0.1 atm 以上，且特定泵功率高于 3 MW/cm3 时，不稳定性会加速增长。在脉冲纵向放电上叠加使用外部交变磁场，可以在保持体积放电燃烧的情况下，将激光器中混合气体的总压力提高到 0.4 atm。
Pulsed CO2 Laser Pumped by a Longitudinal Discharge in an Alternating Magnetic Field
An original technique is suggested for pumping a pulsed CO2 laser by a longitudinal discharge in an alternating magnetic field. A small CO2 laser with active medium ∼200 mm long, pulse energy of ∼30 mJ, and efficiency of 3.4% is designed on the basis of this technique. It is revealed that the main factor which limits the generation energy of small lasers is the development of current instabilities in a longitudinal discharge over a cross section of the discharge tube. It is noted that the growth of the instabilities accelerates as the pressure of a CO2 : N2 : H2 : He gas mixture increases to more than 0.1 atm and the specific pump power becomes higher than 3 MW/cm3. The use of an external alternating magnetic field superimposed on a pulsed longitudinal discharge makes it possible to increase the total pressure of the gas mixture in the laser to 0.4 atm when maintaining the combustion of the volume discharge.
期刊介绍：
Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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