free-space propagation 中文意思是什麼

free-space propagation 解釋
自由空間傳播
  • free : adj （freer; freest）1 自由的，自主的；自立的。 a free action 自由行動。 free competition 自由競...
  • space : n 1 空間；太空。2 空隙，空地；場地；（火車輪船飛機中的）座位；餘地；篇幅。3 空白；間隔；距離。4 ...
  • propagation : 持續培養
  1. We study the propagation of ultrashort chirped pulse beams in free space. the results show that the chirp influenced on the spatial singularity more than the width of the pulse beam

    但是對于啁啾脈沖光束，啁啾導致的脈沖光譜展寬仍然會導致脈沖光束的空間奇異性，脈沖啁啾比脈沖長度對脈沖空間奇異性出現的影響更大。
  2. And this result is extended to the eigenfunction of maxwell ' s equations. then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes. as application, there are three examples : the emergent wave from planar waveguide to free space, the transverse and longitudinal coupling of waveguide and the measurement of scalar gratings

    由於從一個空間到另外一個空間的光束傳播伴隨著界面上各個模式能量之間的耦合，作為應用，本文介紹了完備性在三個情況下的應用：平面波導出射光束的衍射性質、波導的橫向和縱向耦合以及標量光柵的測試。
  3. In this thesis, the properties of the free - space propagation and focus were studied when a beam propagates through an axicon

    本論文主要是探討激光光束經過軸棱錐轉換后產生的無衍射光束的傳輸特性和聚焦特性。
  4. Chapter 1 : the development of the investigation about the free - propagation of ultra - short pulsed beam is introduced, and the necessity of the investigation about the non - paraxial propagation of the ultra - short pulsed beam in free space is discussed

    第一章：本章回顧了超短脈沖光束傳輸的研究進展並討論了超短脈沖光束非傍軸傳輸研究的意義。
  5. Charpter 3 : this charpter investigated the propagation of one - cycle or few - cycle ultrashort pulsed beam in free space

    第三章：這一章研究了單周期或更短的超短脈沖光束在真空中的傳輸問題。
  6. From the fresnel diffraction equation, we calculated the intensity distribution of the fhb in free space, and found that there is an interested propagation property of the fhb before the focal plane. that is, with the increase of the propagation distance z, the dark spot size ( dss ) of the fhb is first increased, and then decreased, the dss has the maximum value at the position of z = - f / 2

    發現在焦平面之前有一個非常有趣的傳播性質，即隨著傳播距離z的增加，這一聚焦中空光束的暗斑尺寸（ dss ）先從另變大然後再變小，最大的暗斑尺寸的位置在z = f / 2處。
  7. We also propose two models to describe the propagation charcteristic of the focused hollow beam in 3d free space : one is the modified tem _ ( 01 ) mode doughnut beam model, the other is the width and narrow gaussian beam model

    同時我們還提出了兩種聚焦中空光束的理論模型，一種是修改的tem _ （ 01 ）模式的doughnut光束模型，另一種是寬、窄高斯光束模型。
  8. Chapter 2 : in this chapter, the basic scalar propagation equation of ultra - short pulsed beam in free space is discussed

    第二章：本章討論了脈沖光束的標量基本傳輸方程。
  9. Chapter 3 : we find a family of solutions of the paraxial wave equation that represents ultrashort pulsed light beams propagation in free space. these pulsed beams have an arbitrary temporal form and a nearly elegant hermite - gaussian cross section, which pulsed beams we call the ultralshort pulsed elegant hermite - gaussian beams

    此脈沖光束解的每個頻率分量都是eleganthermite - gaussain光束，時間脈沖的形狀是任意的，具有相同的衍射距離參數，並且可以描述短於一個光學周期的超短脈沖。
  10. Chapter 3 : the influence of vectorial effect on non - paraxial propagation of pulsed beam is analysed based on the basic vectorial propagation equation of ultra - short pulsed beam in free space. on the basis of the analysis and the result of chapter 2, the vectorial non - paraxial correction of ultra - short pulsed beam is obtained

    第三章：這一章在脈沖矢量傳輸基本方程的基礎上，分析了矢量效應對脈沖光束非傍軸修正的影響，並基於此分析以及第二章所得結果，得出了脈沖光束的矢量非傍軸修正。
  11. Recently, some experiments and theoretical researches showed that there were anomalous propagation of electromagnetic wave in free space and waveguide in some case, and those phenomena is in conflict with classical theories

    近年來，不斷有實驗和理論研究表明，在無界空間和波導中，在某些情況下，電磁波的傳播出現異常現象，這些現象同經典理論有些沖突。
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