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Slide No. Slide No. 11 Optical Networking Technologies Optical Networking Technologies TMTM
Reconfigurable OADMsReconfigurable OADMs
ReconfigurableOADM (ROADM)ReconfigurableOADM (ROADM)
Slide No. Slide No. 22 Optical Networking Technologies Optical Networking Technologies TMTM
ROADM basic functionsROADM basic functions
ROADM basic functions– Add, Drop, Block or Attenuate any wavelength in any node – controlled by
remote management– Power monitoring and equalization of any wavelength– In Multi-Degree units every port can be configured for single wavelength or any
size band of waves.
The result is:
Fully flexible transport networks
Hitless networks upgrades and changes
Full power monitoring and control
SAVE on spares
SAVE on OPEX
Fast time to market
Slide No. Slide No. 33 Optical Networking Technologies Optical Networking Technologies TMTM
Node 5
Node 1
Node 2
Node 4Node 3
OA OA
Static versus Reconfigurable OADMStatic versus Reconfigurable OADM
Fixed wavelengthsnetwork
Node 5 Node 2
Node 4Node 3
OA OATunablenetwork
Node 1
Node 8
Node 9
Fixed OADM ROADM ROADM AdvantagePredefined number of channels in each node
Any number and type of waves can be selected in any node
Network configuration Highest flexibility. Future upgrades do not disconnect the fiber. OPEX savings.
Non equal channels power levels at node output.
Per channel power level equalization and monitoring
Easy network design. Efficient use of Optical Amplifiers without the need for fixed attenuators
Every node is unique waves configuration
All nodes have the same equipment
Savings on spares. Easy network design.
Upgrades requires additional power compensation
All EDFAs are deployed at the initial stage
In-service network upgrades
Slide No. Slide No. 44 Optical Networking Technologies Optical Networking Technologies TMTM
MRV ROADM ArchitecturesMRV ROADM Architectures
LD1600 double “long” slot size modules. For East-West configuration, 4 “long” slots are allocated for ROADM.
2 degree (East-West only) 40 ports Mux/Demux – availability Q4/2006 – Fixed wavelengths on filter ports (40)
– No multiplex fiber solution for ring-ring interconnect
Multi-Degree (1x9 WSS switch) – availability Q2/2007 – 9 Add/Drop ports
– eliminates add/drop filters
– Fully tunable drop ports (single wavelength or multiplex section)
– Enabler for ring to ring or mesh network designs
Slide No. Slide No. 55 Optical Networking Technologies Optical Networking Technologies TMTM
LD1600-ROADM40 structureLD1600-ROADM40 structure
1. 2 x 1 switch
2. VOA
3. Power Monitor
DROP
1 2 3
Insertion lossesCOM IN-DROP = 11ADD-COM OUT =8COM IN-EXP OUT=2.5EXP IN-COM OUT=12
I=1….40
Slide No. Slide No. 66 Optical Networking Technologies Optical Networking Technologies TMTM
East-West ROADM system configurationEast-West ROADM system configuration
2.5db12db
11db8db
Slide No. Slide No. 77 Optical Networking Technologies Optical Networking Technologies TMTM
Designing with 2-degree ROADMDesigning with 2-degree ROADM
RO
AD
M
•Every node looks the same and acts the same•At each Booster Output ALL channels have the same +2dbm (due to 40 waves) power
RO
AD
M
RO
AD
M
RO
AD
M
All channelsAre attenuatedTo mach PassThroughtraffic
+2dbm -18dbm
20db
+2dbm -13dbm +2dbm
0dbm