jdsu presentation
DESCRIPTION
OTDR JDSU specificationTRANSCRIPT
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Tyler Vander Ploeg, RCDD JDSU
Testing 40/100G-Capable Fiber-Optic Systems
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 2
Understanding Parallel Optics & MPO Past / Present / Future Common Issues when testing MPO
Best practices for Testing MPO MPO Test scenarios (10G & beyond) Summary
Agenda
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 3
MPO/Ribbon Fiber Past/Present/Future.
Distribution Switching/Routing
Access Switching
1/10 Gbps Electrical/Optical Ethernet
1/10/40Gbps Optical Ethernet
1/10/40/100Gbps Optical Ethernet
Servers Storage
SAN Switches
Fiberchannel
SAN
12 fiber MPO Link w/Cassettes at either end Fiber consolidation and migration path SFP/SPF+ at each end
6 1/10Gbps Ethernet Links
8 fiber MPO Link w/Cassette Fiber consolidation and migration path QSFP at switch SPF+ at server
4 10Gbps Ethernet Links
40/100Gbps Ethernet Link
12 fiber MPO Link (8 fibers used) QSFP/CFP at both ends
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 4
Polarity Issues Three types of MPO cords in the market, causing a lot of
confusion Need for a graphical tool to provide wiremap like features
Interoperability between 10G->40G links Most installations use break-out cables/cassettes to get 10G links Test Instrument should be able to support LC on one end and
MPO on other Insertion Loss
Maximum permissible loss of 1.9 dB (40GBASE-SR4 Channel) Maximum permissible loss of 1.5 dB (100GBASE-SR4 Channel) Connector loss is critical
Specific Testing Issues for 40/100G (Ribbon/MPO) Fiber
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Polarity and Gender
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 6
MPO Patch Cord Configurations
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Single Fiber vs. Multi-Fiber Connectors
SINGLE FIBER CONNECTOR MULTI-FIBER CONNECTOR
White ceramic ferrule One fiber per connector Common types include SC,
LC, FC, and ST
Polymer ferrule Multiple fibers in linear array
(for example, 8, 12, 24, 48, and 72) in single connector providing high-density connectivity
Common type is MPO or MTP
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 8
Anatomy of a 12-fiber Multi-Mode MPO Connector
The MPO fiber connector has 4 major areas: Fiber Ferrule Alignment pins/sockets Polarity key
Polymer Ferrule
12 Fiber MultiMode Connector (Female)
Alignment pins/sockets
Fibers
Key
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 9
Focused on the Connection
Adapter
MPO Female
MPO Male
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 10
Focused on the Connection
Physical Contact The Physical Contact area is the critical joining point in the fiber network. If there is no clean physical connection, the light path is disrupted and the connection is compromised.
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Top-view Cross Section 12 Fiber MPO - Clean
Physical Contact
Example of Clean Connection (no contamination)
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 12
Top-view Cross Section (112 Fibers)
Particle Dirt
Example of Dirty Connection (contamination causing air gaps, back reflection, insertion loss)
Air Gap 1
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Dirt
Back Reflection
Insertion Loss
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Inspect Before You Connectsm
Follow this simple INSPECT BEFORE YOU CONNECT process to ensure fiber end faces are clean prior to mating connectors.
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IEC 61300-3-35 Sets Requirements for Connector Quality
Multimode MPO Connectors
CLADDING Zone
CORE Zone
Even for MPO!
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 15
Inspect and Clean Both Connectors in Pair!
Inspecting BOTH sides of the connection is the ONLY WAY to ensure that it will be free of contamination and defects.
Patch cords are easy to access and view compared to the fiber inside the bulkhead, which is frequently overlooked. The bulkhead side may only be half of the connection, but it is far more likely to be dirty and problematic.
Patch Cord (Male) Inspection Bulkhead (Female) Inspection
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Inspect ALL fibers in a Multi-Fiber Connector!
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Polarity Checks Type A cord Type B adapter Type B cord = ???!!!
Test from MPO to simplex (SC/LC) Insertion Loss Measurement
Need to be able to perform reference Loss per fiber w/Pass/Fail
Power measurements on live systems
What Other Tests Need to be Performed?
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Check Polarity for Fiber Map
For existing installations, the end-to-end polarity is often not known
Fiber Map shows the polarity of the system or trunk
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 19
Test Scenario 1: MPO to MPO
Easiest way to test Test permanent link trunks Test 40/100G Channels Ensure polarity and loss
C40G Local with
MPO RX
C40G Remote
with MPO TX
MPO Trunk MPO Bulkhead MPO Bulkhead
MPO Test Reference Cords
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 20
Test Scenario 2: MPO to Single Fiber
One end MPO source Other end simplex power meter Testing from MPO to Fanouts or Cassettes End-to-end trunks for 10G to QSFP Fiber Map from MPO to LC/SC
C40G Local with
MMF RX
C40G Remote
with MPO TX
MPO Trunk MPO Bulkhead MPO Cassette
MPO Test Reference Cord
MMF Test Reference Cord
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2012 JDS Uniphase Corporation | JDSU CONFIDENTIAL AND PROPRIETARY INFORMATION 21
Test Scenario 3: Any Source to MPO
One end MPO power meter Other end any source Fault Isolation Testing output power from 40/100G optics
C40G Local with
MPO RX
Any Source
MPO Trunk Bulkhead MPO Bulkhead
MPO Test Reference Cord
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Test Scenario 4: Selected Channels
Can apply to any of the above scenarios Allows selection of which of the 12 channels are active
At the Remote (TX) and at the Local (RX) Helps in cases when 8 or fewer fibers are present in MPO
links (40GBASE-SR4) Results reflect topology No unwanted fails due to nonexistent channels
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Things to Remember for Loss Measurements
Reference first! Connector gender may require three cord reference test
method Three cord reference test method is recommended for channel
testing (plugs at both ends) Check the reference!
Set limit Network or Custom (dB)
Auto-Test Makes it Easy!
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Auto-Test Results Loss and Fiber Map
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Specific Testing Issues for 40/100G over MPO Polarity Interoperability Loss Budgets
Inspect Before You Connect Critical for MPO! Industry standards require Inspection
Todays MPO test tools must be able to: Support the latest Standards & Best Practices Test 1G / 10G / 40G / 100G applications
Summary
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Thank-You!
Testing 40/100G-Capable Fiber-Optic SystemsAgendaMPO/Ribbon Fiber Past/Present/Future.Specific Testing Issues for 40/100G (Ribbon/MPO) Fiber Polarity and GenderMPO Patch Cord Configurations Single Fiber vs. Multi-Fiber ConnectorsAnatomy of a 12-fiber Multi-Mode MPO ConnectorFocused on the ConnectionFocused on the ConnectionTop-view Cross Section 12 Fiber MPO - CleanTop-view Cross Section (112 Fibers)Inspect Before You ConnectsmIEC 61300-3-35 Sets Requirements for Connector QualityInspect and Clean Both Connectors in Pair!Inspect ALL fibers in a Multi-Fiber Connector!What Other Tests Need to be Performed?Check Polarity for Fiber MapTest Scenario 1: MPO to MPOTest Scenario 2: MPO to Single FiberTest Scenario 3: Any Source to MPO Test Scenario 4: Selected ChannelsThings to Remember for Loss MeasurementsAuto-Test Results Loss and Fiber MapSummaryThank-You!