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OM4?OM4?Thomas Ko, RCDDProduct Manager
/Tyco Electronics / AMP NetConnect
What is OM4?
• Multimode Optical FiberMultimode Optical Fiber
• 850‐nm laser‐optimised, 50‐um core diameter/125 um cladding diameter gradeddiameter/125‐um cladding diameter graded‐index multimode optical fibers of OM4 performanceperformance
• Standard compliance– TIA‐492AAAD
– IEC 60793‐2‐10, Tyoe A1a.3
Types of Optical Fibre
SinglemodeCore = 9 umCladding 125 m
Multi-ModeCore = 50 umCladding 125 m
Multi-ModeCore = 62.5 umCladding 125 m Core
Cladding125 umCoating
Cladding = 125 umBuffer = 250 umNumerical Aperture = 0.13
OS1 / OS2
Cladding = 125 umBuffer = 250 umNumerical Aperture = 0.20
OM2 / OM3 / OM4
Cladding = 125 umBuffer = 250 umNumerical Aperture = 0.28
OM1250 um, 400 um or 900 um
OS1 / OS2 OM2 / OM3 / OM4OM1
Types of Optical FibreDispersion
RI ProfileX-View
Light Signal Received Signal
DispersionMultimode Step Index
Multimode Graded Index
Light Signal Received Signal
R i d Si lLaser Signal
Received Signal
Singlemode Step Index
DMD and BW
• Differential Mode Delay (modal dispersion) affects bandwidth
• “New” multimode fiber optimises mode delay
Ref
ract
ive
Inde
x
Profile
Light Sources
LED
VCSEL
• The transmitter– VCSEL (Vertical Cavity Surface Emitting Laser). A VCSEL laser light
source emits at the 850 nm wavelength and it is capable of a high data rate.
– The LED emits light relatively uniformly over the entire face of the– The LED emits light relatively uniformly over the entire face of the multimode fiber core.
Multimode Fiber Types and StandardsStandards
OMx/OSx designations relate to optical fiberOMx/OSx designations relate to optical fiber performance in cable form.
• ISO/IEC JTC 1/SC 25/WG 3 specify the “type” of optical fiber to be used in these cabled constructions by use of the relevant designations in IEC 60793‐2‐10 and IEC 60793‐2‐50.
ISO/IEC JTC 1/SC 25 Standard
• Standard Activity yISO/IEC 11801 2nd Edition 2002, Amendment 2 (2010)
– Six cabled optical fibre Categories are specified to support i l f li tivarious classes of applications.
– Four multimode CategoriesFour multimode Categories
• OM1, OM2, OM3 and OM4new !
– Two singlemode Categories
• OS1 and OS2 new !
Where?
• Where do you most likely use OM4?Where do you most likely use OM4?
DATA CENTERS
Fiber in Data Center
40 Gb/s and 100 Gb/s Ethernet Drivers
Bandwidth demand is growing in every market segment – from consumer, to
t i t i d t t id
LAN Bandwidth Growth Drivers
• Data Centers proliferations
enterprise, to service and content providers
– HPC and SAN
WAN Bandwidth Growth Drivers
• Internet video traffics
– IP‐TV, Digital HD‐TV
– Mobile video
P2P video– P2P video
• Online gaming
• Video conference, Source:
• Tele‐Medicine, Tele‐Learning
Data Center ArchitecturesData Center Architectures
Core
Internet peering (submarine telecom) / “entrance room” telephony
Core
Aggregation
A
Access
Server Farms
Server Clusters
Edge
A B
Core
Storage/Tape Farms
Why OM4 in DC?
• Designed for low cost 850nm Vertical CavityDesigned for low cost 850nm Vertical Cavity Surface Emitting Laser (VCSEL) transceivers
• OM4 provide extended reach beyond the• OM4 provide extended reach beyond the rated length, more connections and greater power marginspower margins.
• Applications include 10/40/100 Gigabit E h Fib Ch l I fi iB dEthernet, Fibre Channel, InfiniBand
x86 Servers by Connection Speed
30Source: Intel & Broadcom (April 2007)
x86 Servers by Connection Speed
20
25
units
10
15
illio
ns s
erve
r
0
5
mi
0
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
100M 1G 10G 40G 100G
10 year transition for 1G Ethernet 6 years for 10GBE 5 years for 40GBE
IEEE 802.3 Standard ActivityP802 3ba Task Force TimelineP802.3ba Task Force Timeline
• IEEE 802 3 Higher Speed Study Group (2006)• IEEE 802.3 Higher Speed Study Group (2006)– IEEE P802.3ba Task Force (Jan 2008)
• 40Gbps and 100Gbps Ethernet• 40Gbps and 100Gbps Ethernet
Rectified June-2010
Updated IEEE 802.3ba Objectives
Operating Range
• The OM4 fiber was developed to allowThe OM4 fiber was developed to allow connections in excess of 100 meters for 40G/100G applications40G/100G applications.
150150 meters
Optical Fiber Considerations
Fiber is not dominant in short distance Client toFiber is not dominant in short distance Client to Access links, but
Access to Distribution and Distribution to CoreAccess to Distribution and Distribution to Core links are fiber!
98% ~95%>98% ~95%
10‐100 Gb/s Optical Modules Reach (meters)Reach (meters)
IEEE 802.3baShort Reach SpecificationShort Reach Specification
• 40GBASE‐SR4 based on 850nm VSCEL• 4 lanes x 10Gbps Multiple Fiber Parallel Systems• Require 4 fibers for transmit plus 4 fibers for receive • Up to 100m with OM3
– Max. Channel insertion loss of 1.9dBd l l ll f d– Connector and splice loss allocation of 1.5dB
0112
• Up to 150m with OM4– Max. Channel
insertion loss of 1.5dB
– Connectors and splice loss allocation
10GB/s lane
1201
splice loss allocation of 1.0dB
10GB/s laneNot used
IEEE 802.3baShort Reach SpecificationShort Reach Specification
• 100GBASE‐SR10 based on 850nm VSCEL• 10 lanes x 10Gbps Multiple Fiber Parallel Systems• Require 10 fibers for transmit plus 10 fibers for receive • Up to 100m with OM3
h l l f d
0124
– Max. Channel insertion loss of 1.9dB– Connector and splice loss allocation of 1.5dB
• Up to 150m with OM4– Max ChannelMax. Channel
insertion loss of 1.5dB
– Connectors and
240110GB/s lane
splice loss allocation of 1.0dB
10GB/s lane10GB/s laneNot used
IEEE 802.3ba40GBASE SR4 & 100GBASE SR1040GBASE‐SR4 & 100GBASE‐SR10
IEEE 802.3ba
• Multimode solutions will be parallel 40GbMultimode solutions will be parallel
– 4 TX and 4 RX for 40G
– 10 TX and 10 RX for 100G
40Gbps
• 3 Options for 100G Tx
Rx
– 1 MPO (preferred)
– 2 MPO top and bottom
2 MPO id b id
Rx 100Gbps
– 2 MPO side by side
– All use the 10 center fibersTx
NOTE: all views are looking into transceiverTx Rx
NOTE: all views are looking into transceiver
MPO Connector(Multi fiber Push On)(Multi‐fiber Push On)
• Internationally, the MPO is defined by IEC‐61754‐7.
• In the USA, the MPO is defined by TIA‐604‐5 (also called FOCIS 5).
• In the data center, the MPO is defined by ISO/IEC 24764‐1.
• Rectangular MT ferrule support each row of 12 fibers up to max of 72Rectangular MT ferrule support each row of 12 fibers up to max of 72 fibers
• Typically terminated with a flat ribbon cable6 4mm
2.45mm
6.4mm
MT Ferrule
MPO Connectors2.45mm
MPO Cabling Solution in DC
Considerations favoring MPO fiber solution
Hi h f d i d i h f• High performance and pre‐terminated in the factory.
• Small form factor
– High‐density
– Space saving in pathways and rack spaces (support better air flow)
• Modular connectivity (Plug‐n‐go concept)
– Easy ScalabilityEasy Scalability
– Short time to install, change, maintain, and recover
• Support existing applications
F t f f 40GBASE SR d 100GBASE SR• Future‐proof for 40GBASE‐SR and 100GBASE‐SR
System Cost Comparion
40G – Multimode vs Singlemodeg
Paul Kolesar, Commscope, “The Case for Extended Reach Multimode Objectives”IEEE 802.3ba, September 2008
System Cost Comparion
100G – Multimode vs Singlemodeg
Paul Kolesar, Commscope, “The Case for Extended Reach Multimode Objectives”IEEE 802.3ba, September 2008
Power consumption
• Lower power consumption critical as linkLower power consumption critical as link density and speed increase– 10G SFP Fiber transceivers consume <1 watt– 10G SFP Fiber transceivers consume <1 watt
– 10GBASE‐T copper transceivers can consume 6 watts or morewatts or more
Savings: 5 watts on each gtransceiver + 5 watts on
licooling
What’s Next
• Band insensitive Multimode Optical Fiber
• Active Optical Fiber Cables
• Convergence of NetworksConvergence of Networks – FCOE
– Infiniband– Infiniband
• Virtualisation
Bend Insensitive Fiber
• Singlemode BI cable availableSinglemode BI cable available
• New development in Multimode fiberB tt b di f th t d d 50– Better bending performance than standard 50um fiber
Improved optical reliability under tightly bent– Improved optical reliability under tightly bent conditions
Bend radius down to 7 5mm (vs 15mm)– Bend radius down to 7.5mm (vs 15mm)• 0.2dB added loss @ 850nm with 2 turns
• 0.5dB added loss @ 1300nm with 2 turns0.5dB added loss @ 1300nm with 2 turns
PARALIGHT Active Optical Cable AssembliesAssemblies
• No Equipment UpgradesNo Equipment Upgrades • Functions like a Standard Electrical Cable• 200 Meters Plus Reach• Low Latency• No EMI• Hot Pluggable• Optical Cable Advantages
/• 1/3 Size of Copper Cable• 3.0 mm O.D. Round
• 1/3 Weight of Copper Cable• Flexible in All Directions• Flexible in All Directions• Ease of Cable Management• Increased Air Flow
Data Center Networking Fabrics
Users
NAS
LANApplications
switch
bl k t adapterswitch
LANEthernet
networking adapter
Applications
SANBlock StorageFibre Channel
block storage adapter
clustering adapterswitch
ClusteringInfiniBand,
Myrinet, Quadrics,etc.
Single Adapter for All TrafficConverged Fabric for Networking, Storage, and Clusteringg g, g , g
Users• Smaller footprint• Lower complexity• Higher bandwidthHigher bandwidth• Lower power• Lower heat dissipation NAS
s itcht ki
Applications
ConvergedEthernet SAN
switchnetworkingstorageclustering
adapter
Trends ‐ Servers Virtualization
• Server virtualization is the logical partitioning of the physical resource into multiple virtual servers
Virtual Servers
the physical resource into multiple virtual servers.• Use software to transform, or “virtualize” the
hardware resources of a server – including the CPU, RAM, hard disk and network controller. VirtualizationCPU, RAM, hard disk and network controller.
• Each functional virtual machine runs their own operating systems and applications.
• This reduces the amount of hardware, power, cabling, cooling and real estate space, which in turn reduces OpEx and CapEx.
• Expect much higher traffics at the physical server IO– Requires higher throughput NICs– Requires faster network speed
R i hi h b d idth bli
Physical Resource
– Requires high bandwidth cabling
Emergence of Virtualization
25 Non Virtualized
15
20
Non VirtualizedVirtualized 70% of servers
will be virtual by 2014
5
10
15
0
5
2007 2008 2009 2010 2011 2012 2013 2014I t St t d C bli• Virtualisation requires network traffic infrastructure and will drive up number of trunks, higher data speeds• With virtualisation it gets even harder to tell what is connected to what. Mapping the logical to the physical
becomes more important, in order to trace faults• Cable Patching becomes less important – you do not need to patch in a new server when one dies
Impact on Structured Cabling
• Structured DC Cabling could be replaced by wiring harnesses, because you only need to ‘wire it once’
Fiber Choices100000
40000
OM
OM
10000
OM3 Single-mode FiberOM4
40000 M3
M4
OM3
1000
Single-mode FiberOM4
dth
OM3
100
Ban
dwi OM3
300 600 2000
50µm Multimode Fiber10
100082Distance (m)
300 600 2000
Selection based on lowest cost electronics
82
Summary
• High Density Optical Cabling is mandatory inHigh Density Optical Cabling is mandatory in Data Centers
• Network speed will only go faster NOT slower• Network speed will only go faster NOT slower
• However fast your enterprise moves toward hi h d h l i OM4 ill h lhigh speed technologies, OM4 will help you maximize the life of your structured cabling system
Thank You
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