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With the steadily increasing demand for fiber-optic communications, researches is more and more being placed in the method known as wavelength division multiplexing (WDM), in this book we will study and design Ultra Wideband using Raman Amplifiers, EDFA using C & L Bands, 83-nm 3 dB Gain-Band using Raman Amplifiers for Long Distance Transmission, and study bit rate and losses limitations in single mode fiber, also we will proposed new model for MC-CDMA and clutter map-CFAR and improved nonlinear equalizer for telephone circuit channels also study the performance analysis of optical ring...

In this book different researches on communication networks will be studied: 1. The WAN protocols with their different ring topologies. 2. The limitations of bit rate and losses in single mode fiber. 3. Ultra wideband system that improved gain-flatness of a Raman amplifier while maintaining a wide gain-bandwidth and a high gain-output power in WDM systems. 4. An 50 nm gain-flattened ultra wide band erbium-doped silica fiber amplifier for high capacity WDM optical communication systems. 5. Suitable packet switching Metropolitan Area Backbone Network to interconnect twenty-six locations. ...