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.
标签： illustration spectroscopy diffraction textbooks
上传时间： 2016-06-04
上传用户：极客
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).
标签： networks blocking switched Because
上传时间： 2017-07-27
上传用户：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.
标签： Propagation Light Media Gain in
上传时间： 2020-05-27
上传用户：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.
标签： Communication Techniques Optical Theory and
上传时间： 2020-05-31
上传用户：shancjb
1-1单透镜这个例子是学习如何在ZEMAX里键入资料，包括设置系统孔径（System Aperture）、透镜单位（Lens Units）、以及波长范围（Wavelength Range），并且进行优化。你也将使用到光线扇形图（Ray Fan Plots）、弥散斑（Spot Diagrams）以及其它的分析工具来评估系统性能。这例子是一个焦距100mm、F/4的单透镜镜头，材料为BK7，并且使用轴上（On-Axis）的可见光进行分析。首先在运行系统中开启ZEMAX，默认的编辑视窗为透镜资料编辑器（Lens Data Editor，LDE），在LDE可键入大多数的透镜参数，这些设置的参数包括：·表面类型（Surf:Type）如标准球面、非球面、衍射光栅..等·曲率半径（Radius of Curvature）·表面厚度（Thickness）：与下一个表面之间的距离·材料类型（Glass）如玻璃、空气、塑胶.…等：与下一个表面之间的材料
标签： zemax
上传时间： 2022-07-27
上传用户：nicholas28
