作者: 離開(kāi)可分裂 時(shí)間: 2025-3-21 23:21 作者: 巡回 時(shí)間: 2025-3-22 02:28
Ernst-Georg Neumannchen und gehen uns an. Nicht dem Einzelfaktum als solches messen wir Bedeutung bei, sondern das Faktum erh?lt als Teil einer Geschichte Bedeutung. Blo?e Informationen k?nnen wir hingegen nicht einmal anst?ndig im Ged?chtnis behalten. Erz?hlungen schaffen Kontur, Pr?gnanz und Resonanz (vgl. Boothe 20作者: 反復(fù)無(wú)常 時(shí)間: 2025-3-22 07:56
Ernst-Georg Neumannchen und gehen uns an. Nicht dem Einzelfaktum als solches messen wir Bedeutung bei, sondern das Faktum erh?lt als Teil einer Geschichte Bedeutung. Blo?e Informationen k?nnen wir hingegen nicht einmal anst?ndig im Ged?chtnis behalten. Erz?hlungen schaffen Kontur, Pr?gnanz und Resonanz (vgl. Boothe 20作者: 一致性 時(shí)間: 2025-3-22 11:14 作者: 言外之意 時(shí)間: 2025-3-22 14:12 作者: 堅(jiān)毅 時(shí)間: 2025-3-22 17:57 作者: AMEND 時(shí)間: 2025-3-22 22:11 作者: 使服水土 時(shí)間: 2025-3-23 04:04 作者: 石墨 時(shí)間: 2025-3-23 09:37
ologisch anf?llig und vor allem jene Differenzierungen vernebelnd, die nun in einer neuen analytischen Sch?rfe ans Licht gebracht werden sollten. Mit der gesellschaftlichen Neuorientierung verbunden war deshalb vor allem die Analyse einer gesellschaftlichen Reproduktion sozialer Ungleichheiten, die 作者: 亂砍 時(shí)間: 2025-3-23 11:21
Introduction,Single-mode fibers are dielectric waveguides for optical waves. Although dielectric waveguides have a history that goes back as far as 1910 [Hondros and Debye 1910], they have never been used for long distance communication at microwave frequencies because of the losses in the dielectric materials available.作者: MAOIS 時(shí)間: 2025-3-23 17:44
Electromagnetic Fields,A light beam propagating freely in air and the fundamental mode guided by a single-mode fiber are electromagnetic waves, i.e. electric and magnetic fields which vary in time and depend on the location of the point of observation. In order to understand single-mode fibers, it is necessary to know how to describe these electromagnetic fields.作者: 天氣 時(shí)間: 2025-3-23 18:52
The Fundamental Fiber Mode,In Sects. 2.2, 3, waveguiding by a single-mode fiber was explained in physical terms. In this chapter, the wave beam guided by the fiber will be described in more detail.作者: Foreknowledge 時(shí)間: 2025-3-23 22:40
Launching of Modes,In this chapter, we will discuss methods for launching guided modes in dielectric optical waveguides. We are, of course, mainly interested in exciting the LP. mode, but e.g. for measuring purposes it is also important to know how to excite a LP. mode.作者: 我正派 時(shí)間: 2025-3-24 03:34
Signal Transmission Through Single-Mode Fibers,The main application of single-mode fibers is in signal transmission. The electrical signal to be transmitted is modulated onto an optical carrier wave which is guided by the fiber in the form of the LP. mode. Different modulation techniques can be used: intensity, amplitude, phase, or frequency-modulation.作者: 貪婪的人 時(shí)間: 2025-3-24 07:52 作者: BORE 時(shí)間: 2025-3-24 13:56
https://doi.org/10.1007/978-3-540-48173-7Dispersion; communication; electromagnetic field; electromagnetic fields; information; joints; measurement作者: Limited 時(shí)間: 2025-3-24 17:43 作者: forestry 時(shí)間: 2025-3-24 19:42
Joints Between Fibers,mal to the fiber axis (Sect. 12.1.1) and then butt-joined, either permanently to form a splice (Sect. 12.2.4), or detachably to form a connector (Sect. 12.2.5). If two identical fibers are jointed with no geometrical misalignment, the two fibers behave like a single continuous fiber and there is no reason for power loss.作者: CLAP 時(shí)間: 2025-3-24 23:45
Components for Single-Mode Fibers,ese devices, such optical components as light source to fiber couplers, splices, connectors, directional couplers, attenuators, multiplexers, isolators, switches, etc. are essential to realize practical transmission systems or are required for measuring purposes.作者: 雜色 時(shí)間: 2025-3-25 05:56 作者: tangle 時(shí)間: 2025-3-25 08:18 作者: 古董 時(shí)間: 2025-3-25 15:32 作者: Gingivitis 時(shí)間: 2025-3-25 17:06 作者: white-matter 時(shí)間: 2025-3-25 20:40 作者: legacy 時(shí)間: 2025-3-26 00:37
Ernst-Georg Neumann – das eine ohne das andere nicht geht. Um zu lernen, müssen wir erz?hlen, und um zu erz?hlen, müssen wir lernen. Oder anders gesagt: Lernen setzt Erfahrungen voraus. Diese ordnen und gewichten wir im Erz?hlen, und durch Erz?hlungen machen wir uns und anderen das Erfahrene erst zug?nglich. Erz?hlung作者: IDEAS 時(shí)間: 2025-3-26 07:32 作者: instulate 時(shí)間: 2025-3-26 12:12 作者: 文件夾 時(shí)間: 2025-3-26 14:14
Ernst-Georg Neumanngswissenschaft“ begleitete und die die geisteswissenschaftliche Tradition zun?chst in die Defensive dr?ngte (Scheuerl 1981), war ein Paradigmenwechsel in die Wege geleitet, der auch die Abl?sung des Kulturbegriffs und eine Neuausrichtung erziehungswissenschaftlicher Forschung am Begriff der ?Gesells作者: Gingivitis 時(shí)間: 2025-3-26 20:50 作者: 走路左晃右晃 時(shí)間: 2025-3-26 22:58
Physical Explanation of Waveguiding by Single-Mode Fibers,[Felsen 1985]. Waveguiding in single-mode fibers cannot be explained as in multimode fibers by total internal reflection of rays at the core boundary (for step-index fibers) or by continuous ray bending in graded-index fibers.作者: Encumber 時(shí)間: 2025-3-27 03:59
Higher-Order Modes,th. These data are combined into the normalized frequency . (5.8). The higher the value of ., the larger the number of guided modes. Although a single-mode fiber is designed for transmitting only the fundamental mode, it is necessary to have some knowledge about the other guided modes, the so-called higher-order modes.作者: 注意力集中 時(shí)間: 2025-3-27 06:11
Spot Size and Width of the Radiation Pattern,extent is an important parameter for characterizing single-mode fiber properties [Alard et al. 1982b] and it is necessary to define a spot size as a quantitive measure for the width of the radial field distribution.作者: 粗魯?shù)娜?nbsp; 時(shí)間: 2025-3-27 12:36
Physical Explanation of Waveguiding by Single-Mode Fibers,rays of “zero” diameter, which in geometric optics are introduced as the geometrical trajectories along which light travels from one point to another [Felsen 1985]. Waveguiding in single-mode fibers cannot be explained as in multimode fibers by total internal reflection of rays at the core boundary 作者: cortex 時(shí)間: 2025-3-27 14:29
Gaussian Beams,by an incident free beam, and produces a free beam radiated from the fiber end. For these reasons, it is worth while studying the basic properties of free wave beams propagating through a homogeneous medium. We have already described some qualitative properties of wave beams in a homogeneous medium 作者: invert 時(shí)間: 2025-3-27 19:33
Higher-Order Modes, refractive-index profile, the number of guided modes depends on the core radius, the relative refractive-index difference, and the operating wavelength. These data are combined into the normalized frequency . (5.8). The higher the value of ., the larger the number of guided modes. Although a single作者: Estrogen 時(shí)間: 2025-3-27 22:55
Radiation from the Fiber End,tially, the fundamental fiber mode is transformed into the fundamental Gaussian beam mode and the second order fiber mode into the second order Gaussian beam mode (Chap. 4). The fiber end acts as as transmitting dielectric antenna, transforming a guided electromagnetic wave into a freely propagating作者: 敬禮 時(shí)間: 2025-3-28 03:55 作者: barium-study 時(shí)間: 2025-3-28 07:34 作者: 粗魯性質(zhì) 時(shí)間: 2025-3-28 11:02
Components for Single-Mode Fibers,ese devices, such optical components as light source to fiber couplers, splices, connectors, directional couplers, attenuators, multiplexers, isolators, switches, etc. are essential to realize practical transmission systems or are required for measuring purposes.作者: 滔滔不絕的人 時(shí)間: 2025-3-28 15:09 作者: Preserve 時(shí)間: 2025-3-28 20:06 作者: 明智的人 時(shí)間: 2025-3-29 01:42 作者: 可以任性 時(shí)間: 2025-3-29 06:40 作者: 沙發(fā) 時(shí)間: 2025-3-29 10:44 作者: 生意行為 時(shí)間: 2025-3-29 12:25 作者: 消毒 時(shí)間: 2025-3-29 16:34 作者: Affirm 時(shí)間: 2025-3-29 22:44 作者: 善辯 時(shí)間: 2025-3-30 03:45
