Migrating Path from 10GbE to 40/100 GbE

Getting You Ready for the Future

Anton IndrawataTechnical Manager

TE Connectivity

Multi Fiber Connectivity

• 1985: MT ferrule technology established by NTT Laboratories• 1988: NTT releases thermoset MT technology. Widely used in

Japan for splicing high fiber count cables• 1991: MPO push on connector released by NTT• 1992: US Conec established in the United States• 1997: IEC 61754-5 standard for MT type connectors

Multi-fiber Connectors

• 1997: IEC 61754-5 standard for MT type connectors• 2000: IEC 61754-7 standard for MPO type connectors• 2001: NTT approves PPS MT ferrule. Improved optical and

environmental performance and lower cost• 2002: Standards established for parallel optics (SNAP 12)• 2004: Growing use of MT technologies in data center applications• 2006: Introduction of electronics using MT connectors

• Future Aggregation of Fibers in Parallel Optic Applications for 40 and 100Gig

Multi-fiber Connectors

Multi Fiber Connectivity, which one is

MTP and MPO?

What is MPO or MTP ?

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MPO: Multi fiber P ush O n

MTP: Mass Transfer P ush-on

What is an MTP or an MPO

Connector?

The MPO connector family is defined by two different standards:International: IEC-61754-7. In USA: TIA-604-5 (also called FOCIS 5).

The MTP multi-fiber connector:• Is USConec Ltd trademarked name for improved quality MPO connector.• Is USConec Ltd trademarked name for improved quality MPO connector.• Fully compliant with both FOCIS 5 and IEC-61754-7;

therefore a MTP connector is an MPO connector.

While there are many MPO connectors on the market ,the MTP parts are distinctly different.The MTP connector is in fact a high performance MPO connector!

MPO(MTP) vs. standard MPO

There is a big difference!

MPO Basics

• One connector does have pins

– Called Male

• One connector without pins

– Called Female

• Same MPO adapter is used in • Same MPO adapter is used in

Cassettes and adapter plates

• Alignment is done by the pin’s

• Spring force to ensure physical

contact is secured by the coupler

MPO(MTP) has a removable housing

When housing shows two side holes, it allows:

• Gender change from male to female and vice versa in the field• Rework and re-polish MT ferrule*• Scanning the ferrule interferometrically after assembly*

*: In the Lab only

MPO(MTP), Inside View

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MPO(MTP) has a better spring

MTP recessed metal pin clamp and oval spring

• The spring is constrained and can not damage the ribbon

• Pins are fixed and can not release during mating and unmating

Std. plastic pin clamp and round spring

• The spring is not constrained and may damage the ribbon

• Pins occasionally release and transfer to female connector

MPO(MTP) does have a floating ferrule

The MT ferrule can move freely inside the Ferrule ho using while mated. This protects it from strain during side load and e nsures physical contact needed for good Insertion Loss and Return Loss.

MTP STABILITY IEC 61300-2-7 (1)International test set up to proof the floating fer rule performance

MTP STABILITY IEC 61300-2-7 (2)

No load 10N loadTest Set Up

MTP STABILITY IEC 61300-2-7 (3)

Transverse Force [10N] @ 1310nm

0.12

0.14

0.16

0.18

0.20A

ttenu

atio

n [d

B]

fiber 1

0.00

0.02

0.04

0.06

0.08

0.10

0.12

A B C D

adapter position

Atte

nuat

ion

[dB

]

fiber 6

fiber 8

fiber 12

MPO(MTP) has a Elliptical Guide Pin

Sharp edges…not goodSharp edges…not good

MTP Guide Pin Std. Guide Pin

Typical MPO guide hole:

damage after 500 matings

Durability Results

MPO(MTP) guide hole:

No damage after 600 matings!

MPO(MTP) has a Thermoplastic ferrule

• MT ferrule is Thermoplastic material

• Others (still) use Thermo set material

• Advantage for Thermoplastic:

1. Fiber physical contact behavior is much more stable in temperature cycle

2. Hole size for pins does not change in environment change with thermoplastic

material

Note: It is possible to recognize material difference from outside

S: SMM: MM

No mark: Thermo set

Die/cavity production code

P: Thermoplastic

MPO(MTP) the Standard Interface

TIA 942 A Changes highlight for Fiber Connector

Aggregation Doesn’t Stop at 12…72!

Aggregation Doesn’t Stop at 12…72!Aggregation Doesn’t Stop at 12…72!

• Pre terminated MPO Trunk Cable

– Various length

– Various fiber types

• Pre loaded cassettes and patch panels

– SC, LC

• High-Density

– 12 Fiber Connector

– Up to 72 Fibers

72 fibers

48 fibers

24 fibers

Data Centers

Fiber Considerations

Data Centers

Fiber Considerations• Business opportunities in the Data Centre market are growing rapidly.

• The market requires application of high bit rate transmission over a

channel with many connectors.

• Typical Data Centre cabling configuration requires many connectors in a

relative short channel lengths of < 45 m to < 55 m and contains up to 6

connectors.

Data Centers

Fiber Considerations

Data Centers

Fiber ConsiderationsTo meet today's data center design and application requirements, an

MPO based fiber cabling system must meet the following criteria:

� Hierarchical and functional elements of the Data Center cabling

standards ISO/IEC 24764 and TIA 942

� Cabling standards performance requirements ISO/IEC 11801

� IEEE 802.3 Performance requirements of 10/40/100 GbE applications

Standard MPO based fiber cabling systems such as the MPO system

meet these requirements, however, due to optical performance, it

allows no more than two MPO based cassettes plus one MPO trunk

cable per channel/cabling subsystem.

ISO/IEC 24764 Applications & Link

RequirementsApplication Length Insertion loss Return

loss

OM1 OM2 OM1 OM2 12 dB

10 Mbit/s 2000 m 2000 m 12.5 dB 6.8 dB 12 dB

100 Mbit/s 2000 m 2000 m 11 dB 6 dB 12 dB100 Mbit/s 2000 m 2000 m 11 dB 6 dB 12 dB

1000 Mbit/s n/a 500 m 2.6 dB 3.56 dB 12 dB

OM3 OM4 OM3 OM4

10 Gb/s 300 m 550 m 2.55 dB 2.55 dB 12 dB

40 and 100 Gb/s 100 m 150 m 1.9 dB 1.5 dB 12 dB

• How many connectors can be used without exceeding 10 Gig power

budget.?

• Lower Loss per cassette and lower MPO – MPO trunk cable are required

• ≤ 0.75 dB per cassette through:

� Usage of premium components

Data Centers Fiber Considerations

Data Centers Fiber Considerations

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� (High precision MT Ferrule and High precision guide pins)

� High quality polishing process

• 2 or 4 or 6 cassette in a channel for 10Gig possible without exceeding

power budget!

Data Centers

Fiber Considerations

Data Centers

Fiber Considerations

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Standard allows to connect subsystems.With MPO this results in channels of 12 connections

Low Loss Budget you need

• The cassette has to be much better than 0.75dB

• Calculate your loss budget into your design

• Create a Custom Test Limit

• Where the MPO cassette is treated as one connector pair (adapter)

• Then if the tester shows PASS, you know the link is 10GBASE-SR compliant

≤0.75 dB

≤0.75 dB

≤0.75 dB ≤0.75 dB

Does not work for Data Center Works for Data Center

Data Centers Fiber Considerations

Data Centers Fiber Considerations

In a 4 MPO Cassette model, the losses as follows:

100m MPO trunk cable:≤ 0.35 dB @ 850 nm≤ 0.15 dB @ 1300 nm

100m MPO trunk cable:≤ 0.35 dB @ 850 nm≤ 0.15 dB @ 1300 nm

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Using traditional MPO Cassette:• Loss budget @ 850nm:2 x 0.75 dB/cassette x 4 + (0.35dB x 2) = 6.7 dB

• With Low Loss MPO Cassette of ≤ 0.35 dB/cassette:Loss budget @ 850nm:4 x 0.35 dB/casette + (0.35dB x 2) = 2.1 dB

Data Center Architectures

Fiber Optic designs• The impact of return loss

– 10/40/100 Gb/s require > 12 dB Return Loss (higher dB is better)

Number of cassettes Standard MPO Low Loss System

1 17 dB 27 dB1 17 dB 27 dB

2 14 dB 24 dB

3 12 dB 22 dB

4 11 dB 21 dB

5 10 dB 20 dB

6 9,2 dB 19 dB

Data Center Architectures

40/100 Gb/s Systems

� 40GBASE-SR4

� 4 Tx and 4 Rx parallel channels

� using 4 + 4 MM parallel fibers

� MT technology

� Change: No single fiber solution

Data Center ArchitecturesData Center Architectures

40/100 Gb/s Systems

� 100GBASE-SR10

� 10 Tx and 10 Rx parallel channels

� Using 10 + 10 MM parallel fibers with MT technology

� No single fiber solution

� 3 Wire map options using 12 or 24 fiber MPO connector

24 Fiber ConnectivityThe Advantage

Data Rate 10Gbps 40Gbps 100Gbps

LASER VCSEL VCSEL Array VCSEL Array

Fibers 6 x 2 = 12 1 x 8 = 8 1 x 10 = 10

Connector LC Duplex 12 Fiber MPO 24 Fiber MPO

12 Core

Schematic

Disadvantage of a 12 Fibers

Infrastructure

Lost Fiber

Schematic

1:6 1:1 2:1

MPO Trunk Cable MPO Trunk Cable MPO Trunk Cable

24 Fiber ConnectivityThe Advantage

Data Rate 10Gbps 40Gbps 100Gbps

LASER VCSEL VCSEL Array VCSEL Array

Fibers Used 12 x 2 = 24 3 x 8 = 24 2 x10 = 20

Connector LC Duplex 24 Fiber MPO 24 Fiber MPO

24 Core

Schematic

Advantages of a 24 Fibers

Infrastructure

Schematic

24 Core Trunks Provide:

1:12 1:3 1:1

MPO Trunk Cable MPO Trunk Cable MPO Trunk Cable

1. 50% More 40Gbps Utilisation

2. 66% Less Trunk Cables for 40Gbps

3. 50% Less Trunk Cables for 100Gbps

Data Center Architectures

Fiber Optic designs

• Optical requirements for 40/100 Gb/s

– 1.9 dB channel IL with OM3 @ 100 m

– New: 1.5 dB channel IL with OM4 @ 150 m

– 12 dB min. Return loss

Extreemely stabile endface geometry is required

40/100 Gb/s Systems

Migration Options

Existing 12 core MPO – MPO trunk cables

40/100 Gb/s Systems

Migration Options

Existing 12 core MPO – MPO trunk cables

Situation tomorrow

Existing 12 core MPO – MPO trunk cables

IEEE802.3ae and IEEE802.3ba

Advantages of

Utilizing 24 Fiber Trunk Cables

1. Guaranteed support for 10, 40 and 100GbE Ethernet

2. Reduces Cable Congestion• 24 Fiber cables are only marginally larger than 12 Fiber cables

3. Recoups 33% of fibers that would be lost 3. Recoups 33% of fibers that would be lost for 40GbE installations

• Only 8 of 12 fibers are utilized in a 12 Fiber Cable, all fibers are used ina 24 fiber cables

4. Guarantees the ability to support future applications

• End-of-Row applications with the ability to split 40GbE into 4 x 10 GbE

Your Take Away

1. MTP is much better version of MPO, but works with all MPO’s.

2. Low Loss is critical moving forward.

3. Don’t waste fiber! 24 core is here and should be utilized.

Thank you for listening

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Thank you for listening