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
The roots of this book were planted about a decade ago. At that time, I became increasingly convinced that wide-area and metropolitan-area networks, where much of my group’s research has been centered at that time, were in good shape. Although research in these fields was (and still is) needed, that’s not where the networking bottleneck seemed to be. Rather, the bottleneck was (and still is in many places) in the access networks, which choked users’ access to information and services. It was clear to me that the long-term solution to that problem has to involve optical fiber access networks.
上傳時間： 2020-05-31
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
Wireless networking is undergoing a transformation from what has been primarily a medium for supporting voice traffic between telephones, into what is increasingly becoming a medium for supporting traffic among a variety of digital devices transmitting media of many types (voice, data, images, video. etc.) Wireline networking underwent a similar transformation in the 1990s, which led to an enormous build-up in the capacity of such networks, primarily through the addition of new optical fiber, switches and other infrastructure.
標簽： Multiusers Detection Wireless Networks
上傳時間： 2020-06-01
上傳用戶：shancjb
The use of optical free-space emissions to provide indoor wireless commu- nications has been studied extensively since the pioneering work of Gfeller and Bapst in 1979 [1]. These studies have been invariably interdisciplinary in- volving such far flung areas such as optics design? indoor propagation studies? electronics design? communications systems design among others. The focus of this text is on the design of communications systems for indoor wireless optical channels. Signalling techniques developed for wired fibre optic net- works are seldom efficient since they do not consider the bandwidth restricted nature of the wireless optical channel.
標簽： Communication Wireless Optical Systems
上傳時間： 2020-06-01
上傳用戶：shancjb
VIP專區(qū)-嵌入式/單片機編程源碼精選合集系列（156）資源包含以下內(nèi)容：1. 《嵌入式應用程序開發(fā)綜合試驗9例》含有9個嵌入式應用實踐源程序。.2. NiosII NiosII!! SOPC CRC32 SOPC SOPC 自定義外設.3. 一個電話本的程序.4. 嵌入式minigui 中自定義控件的應用實例。不下后悔！.5. minigui 時間控件的使用方法.6. 嵌入式linux 設備驅(qū)動程序.7. uart-I2C, working on PIC18F2420.8. 基于mips cpu,在u-boot系統(tǒng)下磁盤驅(qū)動程序。.9. 可以應用到IAR EWARM-EV V5.20破解 使用方法： 1：首先用iarid.exe產(chǎn)生ID 2：使用iarkg.exe產(chǎn)生lic文件.10. 嵌入式開發(fā)前景和趨勢.11. 嵌入式視頻有下載器下載方法及一些基本的調(diào)試技巧。.12. 同濟大學嵌入式學習文檔.13. 轉(zhuǎn)載其他網(wǎng)站的資料與大家分享.14. LED點陣顯示屏掃描程序.15. altera公司開發(fā)銷售的DE2開發(fā)平臺原理圖.16. 基于飛斯卡爾MC9S08QG8的基本程序開發(fā)代碼.17. 本程序中用到DS1302以及液晶等模塊.18. 一個垃圾壓縮車的PLC程序。采用X端口作為模擬量轉(zhuǎn)換后的數(shù)據(jù)量輸入口。這種方法不需要買模擬量模塊.19. 這是一個信號發(fā)生器得程序.20. 這個程序可以用作寄存器的使用.21. FAT32文件應用.22. 電源管理代碼 基于linux2.6.10！apm方式的電源管理！很好的資料！做arm平臺使用.23. I2C zongxian 總線 親自編譯.24. 用Verilog 實現(xiàn)將比特流數(shù)據(jù)轉(zhuǎn)化為SPI協(xié)議數(shù)據(jù)的適配器.25. 最新F2系列的部分外圍模塊中文PDF,來自USER GUIDE的翻譯.26. 單詞計算器,可以統(tǒng)計你輸入的單詞的字母數(shù)有多少個等多個程序.27. FIBER AND wire product designed guider..28. xilin,ise_9.01的使用.29. ISE、Keil_C.30. 一本不錯的數(shù)字圖像處理書（岡薩雷斯中文版）總共有三個壓縮文件需要放在一起解壓縮.31. miniARM嵌入式web主程序,需要在運行miniarm.32. 單片機操作ocmj12232c-1屏的源代碼.33. ISP1582 原理圖.34. x-wrt is the GUI config tool for openwrt,which is a open project about wireless Router.35. 首先介紹了合成孔徑雷達(SAR)的特點.36. tms320vc5509a usb boot.37. 基于Altera fpga 的軟核 nios2的串口調(diào)試代碼.38. cip51 i2c.39. 此源碼為ocm12864系列字符液晶顯示模塊KEIL uVision3 for ARM.40. 此源碼為KEIL uVision3 for ARM 的ocm12864系列字符液晶顯示模塊。.
上傳時間： 2013-06-27
上傳用戶：eeworm
