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/