© Finisar Corporation Confidential 1
Ken Garrett
Emerging Trends and Applications for Cost Effective ROADMs
© Finisar Corporation Confidential 2
Increasing Network Agility ROADM Network Applications
ROADM implementation
• Wireline• MSOData Centers
Wireless Backhaul• Utilities
© Finisar Corporation Confidential 3
WSS/ROADM Demand Continues to GrowHigher Port Count WSS fastest growing area in the next 3 years
CY05 CY06 CY07 CY08 CY09 CY10 CY11 CY12 CY13 CY14 CY15 CY16 CY17 CY18 CY190
10,000
20,000
30,000
40,000
50,000
60,000
70,000
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
WSS (1x4 or less) WSS (1x5 to 1x9) WSS (1x10 or larger) 1x5 or larger + 1x10 or larger (%)
Uni
ts (T
hous
ands
)
Perc
ent o
f WSS
Com
pone
nt U
nits
Source: Infonetics Research May 2015
© Finisar Corporation Confidential 4
1998 COADM 2X2 switches and 8-16 channel mux/demux Colored Add/Drop High Cost Limited Add/Drop
1999 - 2001 Wavelength Blocker LC Array Technology Colored Add Drop Gain Equalization High Cost
2003-2012 WSS & PLC ROADMs 100 GHz & 50GHz Colored and Colorless ADD/Drop Fixed Grid 50 GHz &100GHz Network Deployments MEMS- LC- LCoS-PLC 1X2-1X9-1X16-1X20 Colorless and Directionless Applications Cost Reduced 70% since 2005 Multiple Suppliers
The Next Generation
ROADM Evolution – 4 Generations in 17 years
WSS Price/Port
2000 2014
© Finisar Corporation Confidential 5
Colorless and Directionless Multiplexing / Demultiplexing Enables critical wavelength and route flexibility Contentionless as an “optional” enhancement
High Performance for 100G and Beyond High wavelength isolation for higher modulation formats High bandwidth cascadability
Flexgrid Channel Transmission WSS, OCM, flexgrid multiplexing / demultiplexing Intra-channel power measurement and equalization
Scalability for Large and Small Nodes High Port Count and Dual WSS 8 – 16 node degrees 4 – 8 node degrees
Low Cost Vertical Integration (Dual WSS- 2 in one) Functional Integration (ROADM on a single slot card) Lower Cost Add/Drop for CD (MXN WSS)
Next Generation ROADM Network Features
© Finisar Corporation Confidential 6
Reconfigurable Optical Add Drop Multiplexer
Enables all-optical routing of individual wavelength channels through a node
Express routing Add/drop Wavelength channel power leveling
All-optical: Avoid cost and power consumption
of O-E-O on express paths
Remote configurability: Rapid circuit provisioning Reconfigure network in response to
link or node failures Lower maintenance and operations
costs
Functionality Benefits
ROADMs: Basic functionality
To Node B
To Node C
Local add/drop ports
© Finisar Corporation Confidential 7
Regional / Long Hall Mesh DWDM 50 GHz, Flexgrid™ 100G/400G transmission 4 to 20-degree ROADM CD/CDC Restoration/40G-100G Overlay 40/100G Overlay High power amps / Raman
Metro/Regional Ring or mesh 10G/100G/400G transmission 2-20 degree ROADM Restoration Multiple Coherent Modulations 40G/100G Overlay Wireless Backhaul
Metro Access CWDM or DWDM 50/100 GHz 1G/2.5G/10G/100G transmission Fixed OADM / ROADM MESH + RING Wireless Backhaul
High Speed and Packet
Business Services
Triple Play
3G and LTE
ROADM Application
© Finisar Corporation Confidential 8
RECONFIGURABLE CDC ROADM Wavelength Routing
ApolloOPT9624
TRP
9D-ROADM(100 and 50Ghz spacing)
2D-ROADM(100 and 50Ghz spacing)
Transmit any wavelength from any local port
Colorless
Transmit the same wavelength simultaneously to more than one directions
Contentionless
Transmit any wavelength to any direction
Directionless
TRP
• Most efficient use of spectrum
• Ready for 400Gbps and 1Tbps
Moving to “Gridless” Flexible Spectrum
Uncompromised ability to route any wavelength anywhere in the network, with most efficient spectrum use
ROADMS serve as a transport solution for SDN and NFV implementation
© Finisar Corporation Confidential 9
Data Center Interconnect-Example of an agile SDN –NFV type network application
DC Site1
DC Site2
DC1/DC2 Interconnect provisioned pathContent consumption provisioned path
Alternate path for a temporary period
Control
ContentConsumer(e.g. University)
Connect DC1 to DC2 in highest priority
Resume to “normal” configuration
“OK”
Data Center Manager
© Finisar Corporation Confidential 10
Broadcast and Select ROADM
Passive split on Drop-side
WSS on Add-side
AWG for wavelength mux/demux Fixed Grid
Colored Add/Drop
100% Add/Drop of up to 96 channels 2x100 GHz AWGs on
add side for lost cost
Fixed-grid OCM
Can make colorless by replacing AWG with High-Port Count WSS
Classic (B&S) ROADMO
CM
44 ch AWG88 ch AWG44 ch AWG
1x9
WSS
8x8 Span Crossconnect
8x8 Span Crossconnect
1x8
splitt
er
88 ADD 88 DROP
© Finisar Corporation Confidential 11
20x1 WSS1X20 WSS 20x1 WSS1X20 WSS20x1 WSS1X20 WSS
8x1 WSS
8x1 WSS
Passive splitter
Deg
ree
8
Deg
ree
1
Core switch
Add/Drop D1’ D8’
8x1 WSS
Degree 2
D2’
Up to 8 directions(only 3 shown)
20 add ports
20 drop ports
20 add ports
20 drop ports
20 add ports
20 drop ports
Multi-degree, Colorless and Directional Broadcast and Select Architecture
Interconnects multiple “degrees” or “directions”WSS (tunable mux/demux) used for add/drop => “Colorless”Add/drop ports tied to a particular direction => “Directional”
© Finisar Corporation Confidential 12
Route and Select ROADM
High isolation and OSNR performance, Flexgrid WSS and High Resolution Flexgrid OCMHigher # of ports for degrees and CD/CDC add/drop scalabilityFiltered ports for lower power OA and Noise managementLeverage coherent Rx self-filtering and low-cost splitter mux/demuxLower cost per port
DROP ADD
Dual 1X9or Dual1X20
Two WSS = 1
HRes –Flexgrid OCM
© Finisar Corporation Confidential 13
20x1 WSS
20x1 WSS
Deg
ree
8
Deg
ree
1
Up to 8 directions(only 3 shown)
20x1 WSS
Degree 2
Core switch
Add/Drop
1x20 WSS
1x20 WSS
13 add ports
13 drop ports
13 add ports
13 drop ports
13 add ports
13 drop ports
1x20 WSS
Multi-degree, Colorless and Directional Route and Select Architecture
Tunable mux/demux WSS combined with core routing WSS“Broadcast and Select” -> “Route and select”
© Finisar Corporation Confidential 14
Multi-degree, Colorless, Directionless and Contentionless Architecture using Dual WSS
M×N WSXC: Multi-input Multi-output Wavelength Selective Switch MC-SW: MultiCast Switch
8x13WSXC
orMC-SW
8x13WSXC
orMC-SW
20x1 WS
Or 1X9 WSSS
20x1 WSS
or 1X9 WSS
Deg
ree
8
Deg
ree
1
20x1 WSS
or 9X1 WSSS
Degree 2
Core switch
Add/Drop
1x20 WSS
0r 1X9 WSSS
1x20 WSS
1x20 WS
or 1X9 WSS
8x12WSXC
orMC-SW
8x13WSXC
orMC-SW
8x13WSXC
orMC-SW
8x13WSXC
orMC-SW
Up to 8 directions(only 3 shown)
12 add ports 12 drop ports 12 add ports 12 drop ports
8x13 is only an example.
It can scale to other values.
Main advantage is that it is a pay
as you grow architecture
© Finisar Corporation Confidential 15
Channel ADD/DROP Options
Direct WSS Port Drop/Add Limited number of WSS ports May limit amount of degree connections Direct Detect and Coherent
Mux/DeMux Colored versus Colorless Direct Detect
WSS/Splitter Coherent May have high loss (dependent on size of splitter)
Multicast Switch Colorless/Directionless/Contentionless High Loss Requires amplifier arrays
MXN WSS-High Port Count WSS Colorless/Directionless Coherent or Direct Detect
WSS
??????
WSS
??????
© Finisar Corporation Confidential 16
One Dual MxN WSSNo optical amplifier
WSS Loss~7dBScales to 96+ channelsFlexgrid~50% size & cost reductionSingle Slot with low profile Dual
aSplitter aCoupler
1x8 WSS 1x8 SS
aSplitter aCoupler
8x13 WSS
aSplitter aCoupler aSplitter aCoupler
Four 1xN WSS’sTwo optical amplifiersScales to 96+ channelsWSS Loss~14dB
Prior CD Architecture Approach Dual MxN WSS CD Architecture
8X1 WSS 8X1 WSS
1X13 WSS 13X1 WSS
Why MXN WSS?
8X13 WSS 13X8 WSSAmplifiers
© Finisar Corporation Confidential 17
40x1 WSS
40x1 WSS
Deg
ree
8
Deg
ree
1
Up to 8 directions(only 3 shown)
40x1 WSS
Degree 2
Core switch
Add/Drop
1x40 WSS
1x40 WSS
32 add ports
32 drop ports
32 add ports
32 drop ports
32 add ports
32 drop ports
1x40 WSS
Emerging Future Application:Higher Port Count WSS Node
Improving the add/drop port ratio with higher WSS port count-lower cost
© Finisar Corporation Confidential 18
Emerging Application:Intra-node Connection Verification
ADD Dual MXN WSS
or MCS
Dual MXN WSS or MCS
Dual 2X1X9 or Dual 2X1X20 WSS allows for additional input port that offers loopback path for connection verification
© Finisar Corporation Confidential 19
Summary
Next Generation WSS and Architectures provide a capability to upgrade and future proof service provider networks and address emerging inter-building/remote site data center applications.
Higher Bandwidth-flexibility to transport 10G-400G+SDN/NFV- On Demand ability remotely reconfigure and restore networksColorless Directionless/Contentionless based upon cost and network requirements
Although there are many technology options, the MXN WSS is the most cost effective colorless directionless solution
The introduction of LCoS based Dual and High Port Count WSS continue to drive the cost/port down to provide new Applications, Cost Savings, and Operational Efficiencies
© Finisar Corporation Confidential 20
Thank You
© Finisar Corporation Confidential 21
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