Dense Wavelength Division Multiplexing
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
computer science crazy
Super Moderator

Posts: 3,048
Joined: Dec 2008
21-09-2008, 11:33 PM

The technology of combining a number of optical wavelengths and then transmitting the same through a single fibre is called wavelength division multiplexing (WDM). Conceptually, the technology is similar to that of frequency division multiplexing (FDM) used in analogue transmission. Dense wavelength division multiplexing (DWDM) is anew born multiplexing technology in the fibre optic transmission, bringing about a revolution in the bit rate carrying capacity over a single fibre. The emergent of DWDM system is one of the important phenomena in development of optic fibre transmission. This article gives introduction of DWDM technology. The demand of bandwidth is increasing day by day, especially for data traffic. Service providers are required to provide the bandwidth dynamically and in shortest possible time. This can only be done by DWDM. In future advanced DWDM components will be available. Thus, it will be possible to manage the optical signal dynamically, which will allow more flexibility to the service providers..
Use Search at wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
computer science topics
Active In SP

Posts: 610
Joined: Jun 2010
28-06-2010, 11:51 PM

Dense Wavelength Division Multiplexing

There has always been a technological talent to fulfill the constant need to extent the capacity of communication channel and DWDM (Dense Wavelength Division Multiplexing) has dramatically brought about an explosive enlargement of the capacity of fiber network, solving the problem of increasing traffic demand most economically.DWDM is a technique that makes possible transmission of multiple discrete wavelengths carrying data rate as high as fiber plant allows over a single fiber unidirectionally or bidirectionally. It is an advanced type of WDM in which the optical channels are more closely spaced than WDM.
Use Search at wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
seminar flower
Super Moderator

Posts: 10,120
Joined: Apr 2012
29-06-2012, 11:21 AM

Dense Wavelength Division Multiplexing

.pdf   Dense Wavelength Division Multiplexing.pdf (Size: 1.3 MB / Downloads: 32)
MULTIPLEXING (also known as muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium.
A device that performs the multiplexing is called a multiplexer (MUX), and a device that performs the reverse process is called a demultiplexer (DEMUX).

DWDM Components

Transmitter : Laser with precise stable waveleng-th.
Link: Optical fiber that exhibits low loss and transmission performance in relevant wavelength spectra.
ReceiverTonguehoto detectors and Optical demultiple-xers using thin film filters or diffractive elements.
Optical add/drop multiplexers and optical cross connect components.

DWDM: Key Issues

Dense WDM is WDM utilising closely spaced channels
Channel spacing reduced to 1.6 nm and less
Cost effective way of increasing capacity without replacing fibre
Commercial systems available with capacities of 32 channels and upwards; > 80 Gb/s per fibre
Allows new optical network topologies, for example high speed metropolitian rings
Optical amplifiers are also a key component

Is DWDM Flexible?

DWDM is a protocol and bit rate independent hence, data signals such as ATM, SONET and IP can be transmitted through same stream regardless their speed difference.
The signals are never terminated within the optical layer allows the independence of bit rate and protocols,allowing DWDM technology to be integrated with existing equipment in network.
 Hence, there’s a flexibility to expand capacity within any portion of their networks.

Is DWDM Expandable?

“ DWDM technology gives us the ability to expand out fiber network rapidly to meet growing demands of our customer”, said Mike Flynn, group President for ALLTEL’s communications operations.
DWDM coupled with ATM simplifies the network, reduce network costs and provide new services.
They can add current and new TDM systems to their existing technology to create a system with virtually endless capacity expansion

Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
Last Post: study tips
  MULTIPLEXING PPT study tips 0 300 11-05-2013, 12:10 PM
Last Post: study tips
  WIDEBAND CODE DIVISION MULTIPLE ACCESS PPT study tips 0 369 05-03-2013, 12:53 PM
Last Post: study tips
  DENSE WAVELENGTH DIVISION MULTIPLEXING ppt seminar tips 0 333 07-02-2013, 02:29 PM
Last Post: seminar tips
  REPORT ON CODE DIVISION MULTIPLE ACCESS project girl 0 327 18-12-2012, 02:30 PM
Last Post: project girl
  Orthogonal Frequency Division Multiple Access (OFDMA) FULL REPORT seminar ideas 2 850 03-10-2012, 11:29 AM
Last Post: seminar tips
  Orthogonal Frequency Division Multiplexing PPT seminar ideas 1 1,152 03-10-2012, 11:25 AM
Last Post: seminar tips
  Orthogonal frequency division multiplexing project uploader 1 584 03-10-2012, 11:25 AM
Last Post: seminar tips
  Orthogonal Frequency Division Multiplexing full report seminar ideas 1 610 03-10-2012, 11:25 AM
Last Post: seminar tips
  Orthogonal Frequency Division Multiplexing computer science crazy 2 1,408 03-10-2012, 11:25 AM
Last Post: seminar tips