RF excited diffusively cooled all-metal slab waveguide CO_2 laser

In this paper, a new type of radio frequency (RF) excited diffusively cooled all-metal slab waveguide CO2 laser is presented, in which the waveguide channel is constructed by two aluminum side walls and two aluminum electrodes, the discharge is confined in the slab waveguide channel in terms of the voltage division structure. From this type of structure, 127-W laser power is obtained.     

q形变光场与级联型三能级原子相互作用中场的压缩效应

建立了q形变光场与级联型三能级原子相互作用的非线性理论,求得相互作用绘景中薛定谔方程的形式解,利用数值计算讨论了q形变对相互作用中场压缩效应的影响并与q-偶相干光场的情形做了对比分析。研究发现,q偏离1的程度越大,q形变对场压缩效应的调控能力越强,反映出q形变的非线性行为对量子相干性的干扰以及对量子特性的影响。当q→1时,恢复为普通线性理论。和q-偶相干光场的情形做的对比分析,反映出q-奇相干光场不仅不存在压缩效应,还会弱化压缩效应。这与q-偶相干光场和q-奇相干光场存在不同的量子效应的结论完全一致。     

激光二极管抽运Nd:YVO4晶体的三维热效应分析

针对激光二极管抽运的以Nd:YVO4板条晶体为增益介质的激光器件,基于有限容积法数值分析各向异性介质的热传导方程,给出了Nd:YVO4晶体板条结构的热分布数值模型,并分别模拟仿真了808nm半导体激光器双端端面抽运,大面均匀抽运,大面周期分布抽运三种抽运结构,得到了Nd:YVO4板条晶体在这三种抽运结构下的非稳态时不同时刻的温度曲线和稳态时的三维温度分布切面图.     

Parameter study of RF excited diffusively cooled all-metal slab waveguide CO_2 laser

In this paper, we have investigated some parameters of a radio frequency (RF) excited diffusively cooled all-metal slab waveguide CO2 laser based on the modified Rigrod theory by introducing a waveguide coupling efficiency which designates the coupling between the waveguide and the resonator mirrors. The parameters of the laser small signal gain go, saturation intensity Is, and waveguide coupling efficiency ηare studied theoretically and experimentally. In the experiments, three sets of output coupling flat mirrors with the different transitivities were used, and a maximum laser power output of 150 W was obtained from a gas discharge region of 2-mm height, 20-mm width, and 386-mm length coupled with a CASE-I optical waveguide resonator.