Wavelength Division Multiplexing (WDM)

Introduction
In a WDM system, each of the wavelengths is launched into the fiber, and the signals are demultiplexed at the receiving end. Like TDM, the resulting capacity is an aggregate of the input signals, but WDM carries each input signal independently of the others. This means that each channel has its own dedicated bandwidth; all signals arrive at the same time, rather than being broken up and carried in time slots. The difference between WDM and dense wavelength division multiplexing (DWDM) is f ....etc

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Preface:
Power generation is an important issue today, especially on the West Coast. Demand is outweighing supply because of lack of incentives for the utilities industry to build additional power plants over the past 10-20 years. Electrical innovations (such as the personal computer) were not accounted for in earlier predictions of power utilization and, now, the country is in dire need of streamlining the current power plants while pushing through as many applications as possible for new power plants. In response to this situation, ....etc

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The need for high bandwidth in today's IP-based Internet, and the promise of WDM to provide this high capacity, is fueling the current investigations on IP-over-
WDM networks. Internet growth not only requires providing immense bandwidth but also triggers the need for providing the guarantees with respect to quality of service, security, and fault tolerance. Currently telecommunication networks use SONET/SDH for transmission, multiplexing and protection. It is implemented over WDM. As a result we are using the IP over SONET/SDH ....etc

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Abstract:
wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to enabling bidirectional communications over one strand of fiber. This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing.in wavelength division multiplexing a technique to upgrade the transmission bandwidth ....etc

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Abstract
Most device drivers have one ulterior motive and one target to achieve - deliver the maximum using the minimum. No matter how stable or feature rich a device driver might be, if it cannot perform in terms of high throughput and low CPU utilization, it is as good as any other run of the mill driver.The objective of this topic is to use the thinking out of the box concept and expose techniques, which go beyond just good programming principles to get that extra edge which can put your next driver into the elite group of high perform ....etc

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In a WDM system, each of the wavelengths is launched into the fiber, and the signals are demultiplexed at the receiving end. Like TDM, the resulting capacity is an aggregate of the input signals, but WDM carries each input signal independently of the others. This means that each channel has its own dedicated bandwidth; all signals arrive at the same time, rather than being broken up and carried in time slots. The difference between WDM and dense wavelength division multiplexing (DWDM) is fundamentally than does WDM, and therefore has a greater ....etc

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Wavelength Division Multiplexing (WDM)


In a WDM system, each of the wavelengths is launched into the fiber, and the signals are demultiplexed at the receiving end. Like TDM, the resulting capacity is an aggregate of the input signals, but WDM carries each input signal independently of the others. This means that each channel has its own dedicated bandwidth; all signals arrive at the same time, rather than being broken up and carried in time slots. The difference between WDM and dense wavelength division multiplexing (DWDM) is fundamentally ....etc

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i want to get the appropriate coding for matlab in p-cycle so that i can do the wavelength assignment at the same time along with p-cycle to reduce the blocking probability if the failure occurs. ....etc

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This article is presented by:
H. Erkan, ASM D.
Hossain, R. Dorsinville,
M.A.Ali A. Hadjiantonis


Abstract
This work proposes a simple and cost effective local access WDM-PON architecture that combines the salient features of both traditional static WDM-PON (i.e., dedicated connectivity to all subscribers with bit rate and protocol transparencies, guaranteed QoS, and increased security) and dynamic WDM-PON (i.e., efficiently utilizing network resources via dynamic wavelength allocation/sharing among end-users ....etc

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Under the guidance
S.Arunmozhi

Submitted by,
V.Mahalakshmy




Introduction

Wavelength division multiplexing
- multiple optical carrier signals of unique wavelengths on a single fiber cable.

Advantages of WDM
-high bandwidth.
-extremely low error rate.
-low signal attenuation.
-More secure.
....etc

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