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As the beam further propagation, self-reconstruction of the Bessel beam generated. The divergence of the self-reconstruction beam causes the beam intensity decreasing and the bright spot size increasing as the beam propagating.

光束继续传播,贝塞尔光发生自重建(Self-reconstruction),但重建的Bessel光将会发散,光强随着传播距离增大而迅速下降,且中心亮斑尺寸也迅速增大。

The non-collapse of light beam in self-focusing is given.

得出了在自聚焦过程中没有光束崩溃的结论。

Study of small scale self-focusing in laser beams by high order contrast .

用高阶对比度研究光束的小尺度自聚焦。

The small-scale self-focusing of divergent beams is studied.

研究了发散光束的小尺度自聚焦效应。

On the basis of the analysis,the self-focusing properties of the chirped Gaussian pulse in the chirped pulse amplification system were analyzed and discussed,and the numerical calculations were performed.

在此基础上,针对啁啾脉冲放大系统中的啁啾高斯脉冲,对其全光束自聚焦特性进行了计算模拟和分析讨论。

The self-focusing properties, design, fabrication and diffraction properties of Varied Line-Space grating were investigated in detail.

利用变栅距光栅的衍射光束自聚焦特性,设计和制作了变栅距透射光栅,并对其自聚焦特性进行了研究。

The space correlation and the correlative scale of scintillation of laser beam on long path are discussed and some characteristics of those on short paths are discussed too.

本文还讨论了短程光束的某些特点。

Partially end-pumped slab laser using hybrid resonator is a favourable concept to scale high power with high beam quality in compact dimension.

部分端面抽运混合腔板条激光器可以在紧凑的空间内实现大功率高光束质量的激光输出。

Solid state lasers doped Nd~(3+) operating at near-infrared 1.06μm have been designed into kinds of geometry including rod, disc and fiber.

激光二极管泵浦的高功率固体激光器具有效率高、光束质量好,结构紧凑、寿命长等优势,在工业生产、科学研究和军事领域都有着广泛的应用。

Through the analysis of the loss and threshold characteristics of a laser diode, the threshold current density of LD with external feedback is calculated, according to the theory of multi-beam interference and the definition of equivalent reflection factor.

通过对半导体激光器的损耗和阈值电流特性的分析,引入等效反射系数的概念,根据多光束干涉的原理,导出了在外腔反馈作用下LD的阈值电流公式。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。