the geometry of a diffraction grating, a common illustration in textbooks of optics, spectroscopy, and analytical chemistry. Sliders on the figures allow real-time interactive control of the incidence angle, grating ruling density (lines/mm), wavelength, and diffraction order.
標簽： illustration spectroscopy diffraction textbooks
上傳時間： 2016-06-04
上傳用戶：極客
Because WDM networks are circuit switched loss networks blocking may occur because of lack of resources. Also in circuit switched networks many paths use the same links. This toolbox answers the question how different paths with different loads influence on each other and what is the blocking on each of the defined path. Toolbox is capable of computing blocking for three different WDM network types: with no wavelength conversion, with full wavelength conversion and with limited range wavelength conversion. It is worth noting that case for full conversion can be usefull for any circuit switched network without additional constraints (i.e. wavelength continuity constraint in WDM), for example telephone network. Toolbox contains also scripts for defining network structures (random networks, user defined networks) and traffic matrixes. Three graph algorithms for shortest path computation are also in this toolbox (they are used for traffic matrix creation).
標簽： networks blocking switched Because
上傳時間： 2017-07-28
上傳用戶：zhangzhenyu
An optical fiber amplifier is a key component for enabling efficient transmission of wavelength-divisionmultiplexed(WDM)signalsoverlongdistances.Eventhough many alternative technologies were available, erbium-doped fiber amplifiers won theraceduringtheearly1990sandbecameastandardcomponentforlong-haulopti- caltelecommunicationssystems.However,owingtotherecentsuccessinproducing low-cost, high-power, semiconductor lasers operating near 1450 nm, the Raman amplifiertechnologyhasalsogainedprominenceinthedeploymentofmodernlight- wavesystems.Moreover,becauseofthepushforintegratedoptoelectroniccircuits, semiconductor optical amplifiers, rare-earth-doped planar waveguide amplifiers, and silicon optical amplifiers are also gaining much interest these days.
標簽： Propagation Light Media Gain in
上傳時間： 2020-05-27
上傳用戶：shancjb
Since the advent of optical communications, a great technological effort has been devoted to the exploitation of the huge bandwidth of optical fibers. Start- ing from a few Mb/s single channel systems, a fast and constant technological development has led to the actual 10 Gb/s per channel dense wavelength di- vision multiplexing (DWDM) systems, with dozens of channels on a single fiber. Transmitters and receivers are now ready for 40 Gb/s, whereas hundreds of channels can be simultaneously amplified by optical amplifiers.
標簽： Communication Techniques Optical Theory and
上傳時間： 2020-05-31
上傳用戶：shancjb
1-1單透鏡這個例子是學習如何在ZEMAX里鍵入資料，包括設置系統孔徑（System Aperture）、透鏡單位（Lens Units）、以及波長范圍（wavelength Range），并且進行優化。你也將使用到光線扇形圖（Ray Fan Plots）、彌散斑（Spot Diagrams）以及其它的分析工具來評估系統性能。這例子是一個焦距100mm、F/4的單透鏡鏡頭，材料為BK7，并且使用軸上（On-Axis）的可見光進行分析。首先在運行系統中開啟ZEMAX，默認的編輯視窗為透鏡資料編輯器（Lens Data Editor，LDE），在LDE可鍵入大多數的透鏡參數，這些設置的參數包括：·表面類型（Surf:Type）如標準球面、非球面、衍射光柵..等·曲率半徑（Radius of Curvature）·表面厚度（Thickness）：與下一個表面之間的距離·材料類型（Glass）如玻璃、空氣、塑膠.…等：與下一個表面之間的材料
標簽： zemax
上傳時間： 2022-07-27
上傳用戶：
