transmission technologies
TRANSCRIPT
Transmission NetworkKHNOG
27Jan2016Content
1. Optical Fiber & Spectrum
2. DWDM Technology
3. DWDM vs OTN
4. Network Topology
5. Ethernet Development Roadmap
SARITH HOM (Mr.)
fiber
Single-Mode Fiber (SMF):1. Core 8 µm diameter2. Cladding 125 µm diameter3. Buffer 250 µm diameter4. Jacket 400 µm diamerter
Optical communication wavelength bands in the
InfraRed:
• 850 nm over Multimode fiber
• 1310 nm over Singlemode fiber
• C-band:1550 nm over Singlemode fiber
• L-band: 1625 nm over Singlemode fiber
UltraViolet InfraRed
850 nm 1310 nm 1550 nm 1625 nm
lVisible
Optical Spectrum
DWDM System use optical devices to combine the output/input
of several optical transmitters/receivers
• One traffic channel per fiber pair
• 40 x 2.5 Gbps channels, 80 fibers
Traditional TDM Model
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
STM-16 TxSTM-16 Rx
STM-16 Tx STM-16 Rx
Dense Wavelength Division Multiplexing DWDM
• Multiple traffic channels on a fiber pair
• Each channel transmitted on a different wavelength/color prevents channel interference and
allows them to be separated at the receiving end
• 96 x 100 Gbps channels, 2 fibers
STM-16 Tx
STM-16 Tx
STM-16 Tx
STM-16 Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
STM-16 Rx
100GE Rx
STM-16 Rx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
STM-16 Tx
STM-16 Tx
STM-16 Tx
STM-16 Tx
100GE Rx
STM-16 Rx
100GE Rx
100GE Rx
100GE Rx
STM-16 Rx
STM-16 Rx
STM-16 Rx
100GE Rx
100GERx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Rx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
100GE Tx
ITU Wavelength Grids
• ITU-T l grids are based on 191.7 THz + 100 GHz or + 50 GHz
• It is a standard for the channels in DWDM systems
1530.33 nm 1553.86 nm0.80 nm
195.9 THz 193.0 THz100 GHz
1530.33 nm 1553.86 nm0.40 nm
195.9 THz 193.0 THz50 GHz
lWavelength
Frequency
100GHz Grid
50GHz Grid
lWavelength
Frequency
DWDM Building Blocks
OA ROAD
M
OA
IPoDWDM
IP
IP
OEO
OEO
IPoDWDM
IP
IP
OEO
OEO
Optical
Amplifier
Optical
Add/Drop
DWDM
MultiplexerDWDM
Demultiplexer
Router/Switch/SDH
Grey Line
Cards
Transponder Transponder
Router/Switch/SDH
WXC
WXC
ROADM
Line
Line
Line
Line
ROADM
ROADM
ROADMLine
Line
Line
WXC
Line
WXC
ROADM
WXC
www.ethernetalliance.org/roadmap/