modes of propagation 中文意思是什麼
-
Undershooting error propagation in two kinds of displacement - control modes
兩種位移控制模式下的下沖誤差傳播 -
For the negative uniaxial crystal material, the principal mode is a hybrid guided mode, which can also be excited by the light at any frequency, but when the single mode propagation condition can not be satisfied, some of the higher order hybrid guided modes will exist in the waveguide
對于負單軸晶體，波導的主模是混合模hgm _ 0模，該模式同樣可被任何頻率的光波所激勵；當光波波長滿足一定條件時，波導內傳輸單模，否則，將激勵起高階混合模。 -
The most achievement is that we firstly obtain the analytic accurate solution of the modal fields of the waveguide structure and find some available character : ( 1 ) the different uniaxial crystal materials have the different propagation properties ; ( 2 ) when the optical axis of the crystal is on the plane that is made up of the normal direction of the waveguide plane and the propagation, there are te mode and tm mode in this special waveguide, but the principal mode is different of the character of the uniaxial crystal, the principal mode is the principal mode of te mode for the negative uniaxial crystal, but the one of tm mode for the positive uniaxial crystal ; ( 3 ) when the crystal optical - axis parallel to the waveguide plane, for the positive uniaxial crystal material, the principal mode of the waveguide is a te wave, which can be excited by the light at any frequency ; when the light frequency satisfies a single mode propagation condition, there will be only the principal mode propagating in the waveguide, otherwise some of the higher order modes can be excited, which are neither te modes, nor tm modes, but the hybrid guided modes
本文就是在此背景下，利用金屬波導和單軸晶體的一些特性，結合麥克斯韋方程組和波導的邊界條件，從三種不同的情況研究了光在對稱平面單軸晶體金屬波導（波導層是單軸晶體，兩個波導界面均為金屬）內的傳輸特性，其主要貢獻為，首次解析地得到了這種波導結構下模式場的精確解，並發現了一些有用的特性： （ 1 ）模式場的性質因單軸晶體的性質不同而異； （ 2 ）當單軸晶體光軸位於波導界面法方向與傳輸方向構成的平面內時，波導中傳輸te波和tm波，只不過其主模因單軸晶體的性質不同而異，當波導層介質為負單軸晶體時，波導主模是te波主模，而波導層介質為正單軸晶體時波導主模是tm波主模。 （ 3 ）當單軸晶體光軸位於波導面內時，對于正單軸晶體，波導的主模是橫電波te _ 0模，任何頻率的光波均可激勵該模式；當光波波長滿足一定條件時，波導內傳輸單模，否則，將激勵起高階模式，高階模即匪te波，也匪tm波，而是兩者耦合而成的混合模。 -
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。 -
The propagation and control of soliton in nonlinear kerr optical lattice with harmonic modulation of refractive index are investigated analytically and numerically in this paper. and some innovative research results have been worked out. the forming conditions of lattice soliton from gauss beam and the two modes of its stable propagation are obtained for the first time
本文利用解析和數值方法研究了在具有橫向折射率周期性調制的克爾型非線性光學格子中孤子的傳輸和控制，做出了一些創新性的研究結果:首次得出了高斯光束形成格子孤子的條件和兩種穩定傳輸形式。 -
We begin with the maxwell - field equations, deduce the wave - propagation equations, and then analyze the characteristics of guided modes in optical fiber. based on these, we derive the coupled - mode equations that describe the interaction between the modes
從光纖中的麥克斯韋方程組出發，首先推導出描述光在光纖傳播的波動方程，進而分析光纖中模式特性，並在此基礎上，嚴格推導出描述模式耦合的耦合模方程。 -
From 1920s up to now, various techniques and methods for wave field decomposition, propagation and migration / imaging have been well developed, such as the kirchhoff asymptotic method, frequency - wavenumber domain phase - shift and phase - shift - plus - interpolation methods, and the one - way wave equation based phase - screen and generalized screen methods, etc. wave field extrapolation in these methods is implemented based on the expansion of the wave field by sets of basic functions like spatial fourier harmonies, modes, and green ' s functions
自上個世紀二十年代至今，波場分解、傳播與偏移成像技術經歷了將近一個世紀的發展，形成了多種不同的方法，如kirchhoff波動方程高頻近似解方法，頻率-波數域的相移（ phase - shift ）方法和相移-內插（ pspi ）方法，以及在混合域中基於單向波動方程的相位屏、廣義屏方法等。 -
Then the propagation of different kind of fibers is analyzed according to the ray optics. the novel idea that the quantum theory is introduced in the ray optics has been brought forward, and the theory system of quantized ray optics has been primarily constructed in the paper. according to the quantized ray optics, the modes of wave - guide and optical fiber, soliton theory and the fiber coupling are initially studied
先對傳統的波動光學理論做了概括，主要利用光線光學的理論對光在折射率分佈不同光纖中的傳輸做出了分析，並從光線光學出發引入量子力學的觀點，建立了光線量子論的理論體系，應用該理論對光波導、光纖中的光模式、光孤子理論、光纖耦合幾個光纖應用領域做了初步探討，提出了新的展望。 -
The one - loop vacuum polarization is calculated for untwisted and twisted scalar fields in a flat space - time with the topology s1 r3. the effect of vacuum polarization upon photon propagation is considered. it is found that for the untwisted scalar field some photon modes acquire a positive topological mass, thus travelling at a subluminal speed ; but for the twisted scalar field some photon modes get an imaginary topological mass and travel at a superluminal speed
本文中我們首先計算了在拓撲結構為s ~ 1 r ~ 3的非minkowski時空中扭曲標量場和非扭曲標量場的真空極化，然後考慮了真空極化對光子傳播的影響，我們發現除了光子的極化方向和傳播方向都垂直於緊致化方向的情形之外，非扭曲標量場的真空極化使所有其他的光子模式都獲得實的拓撲質量從而導致這些光子以亞光速傳播；但是，扭曲標量場的真空極化使光子獲得虛的拓撲質量以致他們以超光速傳播。 -
The paper is concerned with the eigen functions of optical fields in dielectrics, the theories of optical waveguide eigen mode, the characteristics of optical waveguides diffracted field, the theories of mode coupling in optical waveguides and the spectral response theories and simulating method for arrayed waveguide grating. in this paper, a set of beam propagation theory based on eigen modes analysis is set up which afforded theoretical basis for designing and analyzing awg devices. experiment of fabricating sio _ ( 2 ) layer by using porus silicon is also carried out in this paper, which is a new method for fabricating waveguide cladding layer
本文以設計陣列波導光柵器件為目標，對介質波導光場的本徵波函數，光波導本徵模理論，光波導衍射場特性，光波導模式耦合理論和awg器件的光譜響應特性及模擬方法進行了深入研究，建立了一套基於本徵模式場分析的光波導光束傳輸理論，為波導器件的設計提供正確的理論基礎，並嘗試了利用多孔硅生長厚的二氧化硅，用於製作波導包層材料。 -
These unusual densities of states were due to the discrete propagation modes peculiar to the photonic crystal composed of alternative left - handed and right - handed materials, and could be used to make very narrow filters totally different from any conventional types of filters
這些禁帶中的態密度是由左右手材料構成的一維光子晶體所特有的，它們可用於製造完全不同於常規濾波器的、頻帶狹窄的新型濾波器。 -
According to fiberglass - reinforced composite material, the propagation modes of lamb wave before and after damage ' s generation is analyzed. ellipse technique is applied to determine damage location. three time delay estimation methods are compared
針對復合材料板，分析了lamb波在結構損傷前後的傳播速度；採用了橢圓技術來確定損傷位置；比較了三種不同的時延估計方法的損傷定位效果。 -
The detailed parts of the mpda tracker are described in detail. and the demonstrations of main formulas are also given. in particular, how to incorporate the close multipath detections and multiple propagation modes is proposed
對多徑概率數據關聯（ mpda ）跟蹤器的各個部分進行了詳盡的介紹，並給出關鍵部分的證明過程，其中提出了多徑量測和多個傳播模式進行合併的思想，同時還改正了參考文獻中的錯誤。 -
To illustrate the superiority of this type of transition, the author adapted the local normal mode ( lnm ) based on couple - mode theory to explain the coupling between two lowest order modes along the transition. for the two important parameters, propagation constants difference between the two modes apy and mode coupling coefficient cy, which denoting power coupling between lnms, the approximation expressions using structure parameters were worked out. then the author compared three typical different transitions according to the demanding of power coupling, at last concluded that the parabolic - type transition can transport the light in shortest length with lowest loss
對于表徵局部標準模之間功率耦合的兩個重要的參數_ （ ij ） （模式傳播常數差）和c _ （ ij ） （模式耦合系數） ，推導了用器件結構參數表達的近似公式，然後根據功率耦合的需求，在常見的三種不同輪廓的過渡區之間進行了比較，得出了拋物形輪廓過渡區能夠使光束在最短尺寸內以最低損耗通過波導的結論。
分享友人