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second-harmonic conversion
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     Second .
     二、破自造论。
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     Second, the s
     第二章:追寻一个普通读者的阅读过程,寻找对诗集的戏剧性的体验。
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     The second is B-spline.
     第二种采用B样条函数法;
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     HARMONIC DIVIDER
     调和仪
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     On Conversion
     论转化构词法
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  second-harmonic conversion
The solution assumes a nondepleted pump and results for a numerical computation of second-harmonic conversion efficiency for a highly efficient process are presented.
      
Second-harmonic conversion of the 532-nm pulsed output of a doubled Nd:YAG laser in KDP was characterized by analyzing the changes in the acoustic signals generated in the crystal at different orientation conditions and for several incident fluences.
      


In this paper, the variation of the phase matching angle and the effective nonlinear coefficient versus the fundamental wavelength in a second harmonic generation of the lithium formate monohydrate (LiCOOH.H2O) of the mm 2 type crystal are calculated. It is found that there is one (or two) optimum phase matching angle (?, ?) for each fundamental wave, at which the second harmonic conversion efficiency is highest. Fitted formula for the variation of the phase matching angle versus the fundamental wavelength...

In this paper, the variation of the phase matching angle and the effective nonlinear coefficient versus the fundamental wavelength in a second harmonic generation of the lithium formate monohydrate (LiCOOH.H2O) of the mm 2 type crystal are calculated. It is found that there is one (or two) optimum phase matching angle (?, ?) for each fundamental wave, at which the second harmonic conversion efficiency is highest. Fitted formula for the variation of the phase matching angle versus the fundamental wavelength is obtained.Second harmonic generation for 0.53?, 0.35? and 0.266? are observed from the crystals cuted at the computative angle.

本文计算了mm2型—水甲酸锂晶体的相位匹配角和有效非线性系数随基波波长变化的规律。发现对每个基波都存在着一个或两个最佳相位匹配角(θ,φ),并作出了θ,φ随基波波长变化的拟合公式。按计算所得的角度切割的—水甲酸锂倍频元件分别得到了0.53μ、0.35μ和0.266μ的倍频光.

AgGaSe2 crystal of φ 20 × 60 mm has been grown by the method of oven temperature drop. The frequency-doubled (5. 3 μm) output and the power conversion efficiency of 1. 12% have been obtained for second harmonic generation of TEA CO2 laser (10. 6 μm). The pumped and the damaged threshold are about 3 MW/cm2 and 11 MW/cm2, respectively. We have also discussed the effect of the beam divergence on the second harmonic conversion efficiency.

用炉温下降法生长出尺寸为φ20×60mm的AgGaSe2单晶体。在12mm长,切角为55°的AgGaSe2中,获得了TEACO2激光的倍频输出,其功率转换效率为1.12%。泵浦阈值和破坏阈值分别为3MW/cm2和11MW/cm2。还讨论了泵浦束的发散角对二次谐波转换效率的影响。

Second harmonic conversion efficiency of nearly 30% in typeⅠphase matching BBO Crystal has been demonstrated with Ti:sapphire femtosecond laser pulses. Analysis on frequent doubling is presented here in particular with femtosecond laser pulses.

用互类匹配BBO晶体对近红外波段钛宝石飞秒脉冲激光做倍频实验,取得近30%的转换效率,对飞秒脉冲激光倍频的有关问题进行了分析讨论.

 
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