wdm systems 中文意思是什麼
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A new laser source of optical communication, erbium - ytterbium codoped phosphate glass waveguide laser that was provided with more prominent performance than semiconductor distribution feedback ( dfb ) laser, has been investigated globally from 1990s. the laser can meet many rigorous demands of wdm systems. the 1. 54 m laser emitted by the laser accords with the interrelated standard of international telecommunications union ( itu ), therefore, a splendent foreground can be predicted about this kind of laser in future optical communication
基於鉺、鐿摻雜磷酸鹽玻璃基片的光波導激光器是一種新型通信光源，具有傳統的分佈反饋半導體激光器所不能比擬的優點，能滿足波分復用/密集波分復用技術對光源提出的諸多高新要求，所發射的1 . 54 m激光符合國際電信聯盟規范，在未來光通信中有著廣闊的發展前景。 -
Fast directsound, eax, a3d, sensaura 3d or macrofx are just a few of the favourite standards supported. the seamless connectivity with dvd players, ac3 - and dts reproduction via the digital interface, as well as the full support of current windows operating systems from 98se to xp with wdm drivers, is also a big advantage. for an easy start, the package includes various applications from dvd player to audio editors and virtual sound studio ; it offers everything you can dream of
對于愛好音樂的使用者來說，一套好的製作工具可激發靈感源源不斷， dmx 6fire 24 96對于專業的應用支持更是其專長，在專業領域中最普遍的asio及最新的wdm kernel streaming都在dmx 6fire 24 96的支持范圍中，不論您是使用steinberg的wavelab nuendo還是cakewalk的sonar ，您都能獲致最短的時間延遲，在96khz的采樣率甚至下可達1 . 5ms ，讓音樂作品完美無瑕。 -
Generally, the designed channel spacing of itu - t standard in wdm systems is from 0. 8nm to 1. 6nm, which is much larger than the spacing required by actual communication bandwidth. for example in lightwave transmission systems, a sghz channel occupies only 0. 04nm at the wavelength band of 1. 55 n m. thus, most of the bandwidth in the actual transmission systems may be wasted
Itu - t標準中wdm系統設計的通道間距為0 . 8nm - 1 . 6nm ，這遠遠大於實際使用的通道帶寬，例如一個帶寬為5ghz的通道在1 . 55 m波段只佔據了約0 . 04nm的波長范圍，因而導致大部分的帶寬被浪費。 -
Many new types of active fiber components and passive fiber components are being researched and developed to meet the demand of wdm communication systems
Wdm通信技術的發展對光纖器件提出了新的要求，各種新型光纖無源器件和有源器件不斷涌現出來。 -
Since the early 1990s, when the electronics industry came to the stage of digital technology, china has broken through in high - end series personal computers and servers, large - scale parallel computer systems, chinese electronic publishing systems, large - scale spc exchanges for central offices, mobile communications systems, sdh wdm fiber communications systems, thin route satellite communications systems, new generation digital video terminals, manufacturing technology for 0. 8 - 0. 35 m cmos integrated circuit chips, etc
到90年代進入數字技術階段，高檔系列微機和服務器產品、大規模并行計算機系統、中文電子出版系統、大型局用數字程式控制交換機、移動通信系統、 sdh波分復用光纖通信系統、稀路由衛星通信系統、新一代數字視頻終端、 08 ? 035微米cmos集成電路晶元製造技術等，都有突破性進展。 -
First, the mean field method is studied in wdm systems with different dispersion maps. by employing this method the computational complexity is greatly reduced without significant sacrifice of the accuracy of the results
首先討論了在不同色散管理方案下平均場方法的應用，該方法在不降低模擬精度的情況下大大縮減了所需運算量。 -
Influence of optical fiber dispersion on the wdm systems
光纖色散對波分復用系統的影響 -
The concept of otn node transmission model is introduced. the requirement of otn node transmission model is discussed. this model uses the frequency domain transmission matrix to express the otn node transport characteristics. the simplified model based on wdm and im - dd systems, the relationship between node characteristics and model parameters and measurement of model parameters are also discussed. at last a briefly discussion on how to develop the otn simulation and cad software based on our model is demonstrated
在線性時不變的假設下，提出利用頻域傳輸矩陣來表示節點傳輸特性的方法給出了oxc和oadm兩類光傳送網節點的統一的表示根據目前通用的波分復用強度調制直接檢波系統的特點對復雜的頻域傳輸矩陣進行了簡化並對通常所關心的節點主要性能指標與模型參數的關系模型參數的測量和計算模型的設計與計算機模擬輔助設計軟體開發的銜接問題進行了討論。 -
Computer technology and internet communication have been developed rapidly since the end of 20th century, which made a lager communication bandwidth was demanded synchronously. in the circumstances, the wavelength division multiplexing ( wdm ) technology was brought forward and applied widely, whereas, the development of wdm systems put forward a series of advanced qualifications about laser sources of optical communication
20世紀末以來，計算機與網路通信技術得到飛速發展，對網路帶寬的需求也隨之不斷增長，波分復用技術因適應這種需求而得到迅速推廣，同時也給通信激光源的性能帶來更高的要求。 -
It is found that the resultant nlse can be applied into wdm fiber communication systems conveniently to research and evaluate nonlinear effects on system performances and thus to provide the important theoretical foundation for real system designs
它可直接適用於wdm光纖傳輸系統的非線性效應的研究，為進一步深入研究光纖非線性效應對wdm系統傳輸性能的影響提供了的理論基礎。 -
It is found that the resultant nlse can be applied into wdm fiber communication systems conveniently to research and evaluate non1inear effects on system performances ii and thus to provide the important theoretical foundation for real system designs
它可直接適用於wdm光纖傳輸系統的非線性效應的研究，為進一步深入研究光纖非線性效應對wdm系統傳輸性能的影響提供了的理論基礎。 -
2. based on the revelant standards of itu - t and related references, is designed. the general scheme of 32 x 10gbit / s 480km wdm transmission system are designed for the most systems which fiber are model g. 652
基於國際電聯的itu - t系列參考標準和信息產業部的相關標準，進行32 10gbit s480km的wdm光纖通信系統總體設計和規劃。 -
Generation of multi - wavelength signals and ultra - short pulses are of great importance for a wide range of applications such as in wavelength - division - multiplexed ( wdm ) and optical time - division - multiplexed ( otdm ) fiber communication systems, fiber sensing, nonlinear optics, optical instrument testing, and time - resolved spectroscopy
密集波分復用（ dwdm ）和光時分復用（ otdm ）是實現光纖通信系統升級擴容的有效途徑，而多波長信號及高重復頻率的超短光脈沖的產生則是與其相對應的兩種關鍵技術。 -
Xpm is the mainly considered nonlinear effects in high - speed wdm systems
交叉相位調制是高速多通道光纖通信系統中考慮的一種主要的非線性效應。 -
In present commercial wdm systems, distributed feedback las ers ( dfb - ld ) are widely used as a single - mode tight source
在目前的wdm系統中，分佈反饋半導體激光器（ dfb - ld ）已被廣泛地用作單頻光源。 -
Wavelength devision multiplexing ( wdm ) has become the technology to meet the rapid increase of bandwidth and capacity requirements in communication systems and networks, multiplexing and de - multiplexing devices are the key components in wdm system
波分復用技術是解決寬帶，大容量光纖通信網路的一種有效方法，波分復用解復用器件是wdm系統的關鍵器件。 -
Among the active fiber components, the fiber lasers, especially the fiber lasers based on fbgs ( fiber bragg gratings ), attract researchers ’ attention because of its simple integrability with the basic fiber systems and good temperature stability. fiber lasers are emerging as an interesting alternative to semiconductor laser diodes for use in future wdm communication system
在光纖有源器件中，光纖激光器，尤其是基於光纖光柵的光纖激光器，以其與常規光纖自然的兼容性和良好的溫度穩定性等優點為世人所關注，成為半導體激光器有力的競爭對手。 -
In the discussion of design problems in optical communication systems, the design methods for wdm multiplex filter are provided and analyzed
在光通信系統中，對波分復用薄膜窄帶濾光片的設計問題進行了深入的討論。 -
Photorefractive gratings are promising to be applied to wavelength division multiplexing ( wdm ) systems and electro - optic integration due to the advantages of small size, simple structure, easy erasing, high diffraction efficiency, low temperature sensitivity, narrow band filtering and so on
光折變光柵具有體積小、製作簡單、易擦除、可以實時處理、衍射效率高、溫度響應小、可以進行窄帶濾波等優點，其在波分復用系統和光集成方面有著潛在的應用前景。 -
Meanwhile, with the development of wdm / dwdm communication systems, more and more attention is paid on the edfas with broader bandwidth, good gain and noise feature, and gain clamping, etc. according to the tianjin natural science foundation project : intelligent fiber amplifiers and light sources, the tianjin natural science foundation project : ( c + l ) broadband fiber amplifier and the nankai - delta ( tianjin ) project : development of gain flattened erbium - doped fiber amplifiers, this dissertation is mainly focused on the study of novel gain - clamped edfa, light sources, multi - wavelength fiber laser and variable optical attenuator for gain - clamped usage, gain and noise improvement of edfa, and broadband edfa
Wdm / dwdm通信系統的發展又需要edfa具有更大的帶寬、優良的增益和噪聲特性和增益控制等功能。基於上面的情況，並結合天津市重點基金項目? ?智能光纖放大器光源的研究、天津市重點基金項目? ? （ c + l ）超寬帶摻雜光纖放大器和南開-達爾泰（天津）項目? ?開發增益平坦的摻鉺光纖放大器等課題，論文主要圍繞新型增益控制edfa 、增益控制用光源、多波長激光器及可調光衰減器、 edfa性能優化和超寬帶edfa等方面進行了理論和實驗研究。
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