Lateral and transverse mode properties of CO2 slab waveguide lasers
Lateral and transverse mode properties of CO2 slab waveguide lasers
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DOI：
10.1016/0030-4018(92)90552-3
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发表时间：
1992-05
影响因子：
2.4
通讯作者：
C. J. Shackleton;K. Abramski;H. Baker;D. Hall
中科院分区：
文献类型：
--
作者：
C. J. Shackleton;K. Abramski;H. Baker;D. Hall
高菲涅尔数，板条波导，二氧化碳激光器的输出已被调查的电极间隙为0.7和2.25毫米之间。观察到的光束强度图案被发现是一致的高阶矩形波导模式的分析。高阶横模抑制间隙小于1.5毫米已经实现和横向模式签名的波导模式频率和空间模式竞争方面的理解。实验证明了该器件可以工作在EH 16，1波导单模中。输出功率为18毫米宽的板条已增加到210 W，在1毫米的电极间隙，对应的比功率为30千瓦m-2的平面，大电极面积，射频激发激光器。对于铝电极，（gap）-1放电缩放定律和（gap）-3导向损耗缩放效应之间的交叉发生在1.2 mm处。
The output of a high Fresnel number, slab waveguide, carbon dioxide laser has been investigated for electrode gaps between 0.7 and 2.25 mm. The observed beam intensity patterns are found to be consistent with analysis in terms of high order rectangular waveguide modes. High order transverse mode suppression for gaps less than 1.5 mm has been attained and the lateral mode signature understood in terms of waveguide mode frequencies and spatial mode competition. Operation in a single EH16,1waveguide mode has been demonstrated. Output power for an 18 mm wide slab has been increased to 210 W at 1 mm electrode gap, corresponding to a specific power of 30 kW m-2for planar, large electrode area, rf excited lasers. The cross-over between the effects of the (gap)-1discharge scaling law and the (gap)-3scaling of guide loss is shown to occur at ∼ 1.2 mm for aluminum electrodes.