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The study showed that not only the relative concentrate of light energy through coherent combination can be achieved,but also the dark region of light intensity, owing to coherent ,have been compensated by the contribution of output beam of plano-concave cavity at nearfield.

研究表明，在近场，不但可以获得由于相干而引起的光能相对集中，而且，中间平凹腔对光束的贡献补偿了相干引起的暗区的光强，整体提高了光强。

The influence of KTP's thermal effect was controlled and the efficiency of the frequency doubling increased. The steady working of KTP crystal in high power level was realized. 3. A traditional plano-concave cavity was used.

采用传统平凹腔，分析了高泵浦功率下Nd：YAG棒热透镜效应和热致双折射效应的影响，得到了高功率激光器运行在第Ⅱ稳区并且基模体积受到限制的结论。

A theoretical model based on the six-temperature mode rate equations is suggested to interpret such a phenomenon, which is used to calculate the wavelength-temperature shift relation of a TEA CO2 laser with plano-concave stable resonator.

通过建立六温度理论模型，用数值计算的方法揭示了平凹稳定腔脉冲TEA CO2激光器输出波长的温度漂移规律。

In order to study the output characteristics of diode-end-pumped Nd:YAP laser operating at 1341.4nm,the thermal focal lengths of end-pumped Nd:YAP laser were calculated and measured,and the output results of lasers with plane-plane and plano-concave resonators were compared respectively.

为了研究Nd：YAP晶体在LD端面抽运中的1341.4nm激光输出特性，采用理论计算和实验测量了实验系统的热焦距，对比了平平腔和平凹腔激光输出结果。

By controlling the size of pump beam and inserting an intracavity aperture in the plano-concave cavity, we obtain good contrast optical bottles at semi-confocal, 1/3-, and 1/5-degenerate cavity configurations, respectively.

只要适当的控制泵浦光斑与腔内实光栏的大小，在半共焦腔、1/3简并腔、与1/5简并腔下可以产生不同但是对比度极佳的瓶型光束。

Under the same conditions, the mode distortions induced by the tilted mirror are smaller for the plano-concave resonator with the Gaussian-reflectivity, and the relations of the field distributions with Gaussian-reflectivity to the tilt angles are different from those with even-reflectivity.

同等条件下，高斯反射率平凹腔腔镜倾斜对谐振腔引起的模畸变小于均匀反射率平凹腔，且基模光场及本征值随镜倾斜的变化关系稍不同于均匀反射率平凹腔。

A flash-lamp-pumped, passively Q-switched Nd:GdVO4 laser with Co:LMA as saturable absorber is demonstrated in plano-concave laser cavity.

当腔长为16.3cm，泵浦能量为19.8J时，输出的单脉冲能量为4mJ，脉冲宽度为80ns，对应的峰值功率为50kW。

The high power diode end-pumped Q-switched Nd:YVO_4/KTP red laser was demonstrated by using a simple plano-concave cavity. At the repetition rate of 15kHz, the maximun average output power of 1.37W was attained, with the corresponding pulse width of 33ns.

采用简单的平凹腔结构以及KTP倍频晶体实现了全固态高功率Nd：YVO_4/KTP腔内倍频671nm红光输出，其最大平均输出功率为1.37W，相应的重复频率和脉冲宽度分别为15kHz和33ns。

The model for calculating the stability of the resonator containing a laser rod with curvature ends was developed,which was based on the transfer matrix theory of Gauss beam. The results from the numerical simulations on some typical resonators indicate that the laser rod with curvature ends can expand the stable region of plano-plano,plano-concave and plano-convex cavity notability;despite the laser rod with curvature ends can improve the stability of above mentioned cavities,it costs the effective mode volume.

计算结果表明，对于几类典型的谐振腔如平平腔、平凹腔，球面端面激光棒可以显著的扩展强热聚焦作用下的稳定工作范围；球面端面激光棒在提高约束稳定性和热稳定性的同时，通常是以牺牲有效模式体积为代价的。

The plastron is also only just concave on the male shown.

只有雄性刺山的腹甲会呈现凹陷。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。