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     By using a three mirror folded-cavity resonator,with injection pump power of 15 W,continuous wave TEM_(00) mode yellow laser at 589 nm of 860 mW is obtained,its optical-optical conversion efficiency is 5.7%,M~2 factor is less than 1.2.The output power has low noise,and the power fluctuation in 4 h is better than ±3.4%.
     实验采用三镜折叠腔结构,在808 nm的15 W抽运功率下,获得了最高功率为860 mW连续波TEM00的589 nm黄激光输出,光-光转换效率为5.7%,激光输出功率噪声低,光束质量因子M2<1.2,4 h功率稳定度优于±3.4%。
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     Biaxial(-)with low birefringence.
     双折射率
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     low social status;
     社会地位;
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     Relative distribution at focal plane of low-order modes for Gaussian laser beams
     高斯光束阶模焦点能量的相对分布
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     better beam quality and lower noise than semiconductor lasers;
     与半导体激光器相比,光束质量较好,噪声较;
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     Focusing of twisted anisotropic Gaussian-Schell model beams
     AGSM光束的聚焦
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  lower beam
It has been found that at the highest projectile energy of 290 MeV/u, in opposite to the lower beam energies, the detailed structure of this edge cannot be reproduced satisfactory within the approach applied.
      
Inclusion of a high-density pusher, which increases the fuel compression leads to higher gain at lower beam energy, but two-dimensional simulations demonstrate the extremely violent instability of the fuel-pusher interface.
      
The lower beam, kept at a constantand uniform temperature, vibrates and scatters standing acousticwaves into the gap, which induces acoustic streaming in the gapdue to the non-zero mean of the acoustic field.
      
Parametric studies reveal that the ratio of flexural rigidity of upper and lower beam and the ratio of stiffness of the upper and lower soil layers affect significantly the response of the foundation.
      
Lower beam current and lower proton energy increase the yield of [11C]-CO2.
      
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The main topics discussed in this paper are soft X-ray plasma sources, multilayer soft X-ray mirrors and soft X-ray microscopes. The powerful, laboratory soft X-ray plasma sousces offer some advantages over synchrotron radiation in terms of smaller physical size, lower cost, large beam size and higher flux per pulse. Recently developed multilayer coatings permit use of normal incidence optics for soft X-ray promissing a resolution that should be substainlly better than that obtained with grazing incidence optics....

The main topics discussed in this paper are soft X-ray plasma sources, multilayer soft X-ray mirrors and soft X-ray microscopes. The powerful, laboratory soft X-ray plasma sousces offer some advantages over synchrotron radiation in terms of smaller physical size, lower cost, large beam size and higher flux per pulse. Recently developed multilayer coatings permit use of normal incidence optics for soft X-ray promissing a resolution that should be substainlly better than that obtained with grazing incidence optics. Soft X-ray microscope has provided a new tool for analyzing biological specimens and filled the gap existing between two well developed instruments, the optical ane the electron microscopes.

本文主要介绍软X射线等离子体光源、多层膜软X射线反射镜和软X射线显微镜。高强度的实验室用软X射线等离子体光源较之同步辐射具有体积小、造价低、光束大和单位脉冲光通量高等优点。最近发展的多层镀膜用于软X射线正入射光学元件,可以得到比掠入射光学元件好得多的分辨率。软X射线显微镜提供了生物样品分析的一种新工具,它填补了常用的光学显微镜和电子显微镜之间的空隙。

 
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