beam defocusing 中文意思是什麼
beam defocusing
解釋
束流散聚- beam : n 1 梁，棟梁，桁條；（船的）橫梁。2 船幅；（動物、人的）體幅。3 （秤）桿，杠桿，（織機的）卷軸，...
- defocusing : 發散
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The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing. the equation describing the evolution of the laser spot is derived. it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam
考慮多光子電離效應和光學kerr效應，首次利用力學類比的方法研究了超短脈沖激光在電離氣體中的傳輸，詳細分析了傳輸距離與激光初始光斑、初始發散角以及激光功率的關系，提出了實現長距離傳輸的條件。 -
In this paper, dual - beam transmission problem that possess to a certainty included angle and gains the nonlinear schrdinger coupled equation ( nnlse ) in self - defocusing media is discussed
摘要自散焦介質中雙光束斜入射耦合能發生光束偏轉，通過數值模擬發現在非線性折射率不是均勻分佈時光束偏轉能降低抽運光功率並且偏轉角度不減小，在相同的功率條件下，能產生更大的偏轉。 -
How a dark pump beam induces a bright probe beam to focus in two - and three - dimensional self - defocusing media is discussed in chapter 5
第五章，討論了二維和三維自散焦介質中具有暗光束分佈的泵浦光對基模高斯信號光的聚焦作用。 -
Secondly, it is numerically simulated how a dark pump beam induces a bright probe beam ( with the gaussian profile spatially ) to focus in two - and three - dimensional self - defocusing media, and the main factors that have influence on the focusing of the probe beam are also analyzed
二、研究了具有暗光束分佈的泵浦光與基模高斯型信號光在二維和三維自散焦介質中同向共同傳輸時的誘導聚焦現象，分析了影響聚焦過程的主要因素。 -
It has been theoretically and experimentally demonstrated that in self - defocusing media, a weak beam ( the probe ) can be induced to focus by a strong beam ( the pump ) that propagates simultaneously with it
理論與實驗結果均表明，在自散焦介質中，強泵浦光可誘導與其共同傳輸的弱信號光聚焦。 -
In chapter 4, it is simulated that a probe beam and a pump beam counter - propagate in a two - dimensional self - defocusing medium and thorough analyses are made to the induced focusing in this configuration
第四章，用分步傅立葉方法模擬雙光束在二維自散焦介質中的對向共同傳輸過程，對出現的誘導聚焦現象進行了系統的分析。
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