29-06-2012, 11:21 AM
Dense Wavelength Division Multiplexing
Dense Wavelength Division Multiplexing.pdf (Size: 1.3 MB / Downloads: 55)
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.
Receiverhoto 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
Dense Wavelength Division Multiplexing.pdf (Size: 1.3 MB / Downloads: 55)
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.
Receiverhoto 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