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Points to be considered in DWDM design
Availability
Cost
Traffic growth
Bandwidth
Capacity
Spectral efficiency
Protection scenarios
Transmission impairments ( Linear & non linear effects ) -
DWDM main bulding blocks
OTM ( Tributary , Line , XC , Transponder )
REG
FOADM
ROADM / TOADM
Optical Amplifiers ( EDFA , RAMAN , hybrid )
Interleavers
OSC boards
DCM
Filters ( MUX , Demux ) -
Network levels
Access
Aggregation
Core -
Network topologies
Star
Mesh
Ring ( intersected , Tangent )
Linear -
Bands
C
L -
Fiber to be used
DSF G653
NDSF G652
NZDSF G655
G654 -
Tx impairments
Attenuation
Dispersion ( chromatic & polarisation )
FWM
SPM
XPM
Kerr effect -
Link power budget
OSNR
BER
Rx sensitivity
Rx overload
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