WSS based pannordic optical network

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WSS based pan-nordic optical network

• TR-OADMs in NORDUnet

Lars Lange Bjørn, NORDUnet A/S CEF Prague - May
15th 2009
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NORDUnet

• NORDUnet is an collaboration between the Nordic
  national networks for research and education
• Uninett, Norway
• FUNET, Finland
• SUNET, Sweden
• Rhnet, Iceland
• Forskningsnettet, Denmark

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NORDUnet Network
NorthernLight Optical Backbone Cross Border
Fibre Connection to Iceland Global
Connectivity Peering Interconnect Point
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DWDM network before Q2 2009
Helsinki
Stockholm
Oslo
Copenhagen
Hamburg
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W.B. design
CMDX
W
E
TRBD
BMDX
AMP
OADC
W.B.
AMP
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W.B. principle
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WSS function
array of switching elements (one element per l)
input and output fibers
array of collimating lenses
afocal system
diffraction grating
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WSS attenuation
Pos 2 misaligned
Power
output fiber
Pos 1 - direct
input fiber
Pos 1
Pos 2
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WSS 91 - Principle 2-D
chosen output port
qx
input port
y
l3
l2
l1
qx
qy
diffraction grating
attenuation axis
x
x
switching axis
z
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WSS node design
N
S
N
S
WSS 71 w. OSA
AMP
AMP
OADC 12
OADC 82
WSS 18
W
E
TRBD
TRBD
WSS 18
OADC 12
OADC 82
AMP
OADC
WSS 71 w. OSA
AMP
N
S
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Adjusting output power
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Checking the spectrum
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Summary

• Operational
• Uniform cabling
• Easier installations
• Easier power adjustments/measurements
• Design
• Not limited by fixed mux/demux
• Flexible wave length planning
• Networking
• Better switching options
• Better support for alien waves
• Better suited for multi degree nodes

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Thank you
Lars Lange Bjørn, longbear_at_nordu.net CEF Prague -
May 15th 2009