射频激励板条波导CO2激光器远场空间压缩单峰输出模式的研究

从研究射频激励板条波导CO₂激光器远场压窄单峰的理论成因出发,根据实验现象,通过理论分析和数值计算得出宽波导平平腔自再现模,这种自再现模式与无波导壁时不同,其近场具有复杂分布,理论分析表明求出这种模式的远场是压窄单峰强度分布,实验结果证实了这种模式的存在.

RF-excited slab waveguide CO2 laser with the far field intensity distribution of a single suppressed peak

This paper theoretically studied the properties of the mode structure and modes evolution of a slab waveguide CO2 laser with a far field intensity distribution of a single spatially suppressed peak. To well explain the experimental result, physical model based on the Diffractive Optics was proposed in this paper. A self-consistent mode equation under condition of waveguide wall was set up. By the use of the numerical method, the self-consistent mode was solved under the condition of waveguide wall. The theoretical results show that the farfield of the mode is single peak while its nearfield is a multiple spots. These theoretical results well agree with the obtained experimental result.