ETHERNET FIBER OPTIC CABLING TRENDS › wp-content › uploads › 2016 › ... · Ethernet Fiber Optic Cabling Trends • Moderator –Doug Coleman, Manager of Technology and Standards,

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ETHERNET FIBER OPTIC CABLING TRENDSDoug Coleman, Corning

Moderator

OFC 2016

March 23, 2016

Ethernet Fiber Optic Cabling Trends

www.ethernetalliance.org 2

• Opinions expressed during this presentation are the views of the presenters, and should not be considered the views or positions of the Ethernet Alliance.

Ethernet Fiber Optic Cabling Trends

• Moderator

– Doug Coleman, Manager of Technology and Standards, Corning

• Data Center Channel Lengths 2013-2015

• Panelists

– Paul Kolesar, Engineering Fellow, CommScope

• WBMMF & SWDM

– Brett Lane, Director of Technology, Panduit

• Structured Cabling

– Greg McSorley, Technical Business Development Manager, Amphenol

• Lower Cost TOR interconnect



ETHERNET FIBER OPTIC CABLING TRENDS: DATA CENTER CHANNEL LENGTHS 2013-2015Doug Coleman, Corning Incorporated

OFC 2016

March 23, 2016

OM3 Channel Length


Source: Corning

OM4 Channel Length


Source: Corning

SMF Channel Length - Enterprise


Source: Corning

SMF Channel Length - Hyperscale


Source: Corning


ETHERNET FIBER OPTIC CABLING TRENDS: WBMMF & SWDM

Paul Kolesar – CommScope, Chair TIA TR-42.11

OFC 2016

March 23, 2016

Background

• Lane rates up to 28Gbps standardized over MMF

– 32GFC (28G), 100GBASE-SR4 (4x25G), P802.3bs (16x25G), P802.3by (25G)

• Alternative technologies supplement lane rate increases

– Spatial muxing, WDM, higher-order modulation, bi-di transmission

• WDM technology is gaining momentum

– Transceiver manufacturers releasing devices employing short-wave division multiplexing (SWDM) for 40G and 100G applications

– SWDM Alliance formed with eleven member companies

– Fiber manufacturers optimizing properties of MMF to suit

– New standard for WideBand Multimode Fiber (WBMMF) nearing completion…


WBMMF Standardization Background• TIA TR-42 WBMMF project

– Supported by fiber, transceiver and system companies

– International participation from IEC 86A members

– TIA-492AAAE publication anticipated June 2016

• TIA structured cabling standard revision

– TIA-568.3-D publication anticipated June 2016

– Added cable with TIA-492AAAE fiber as recommended media

• IEC 86A WBMMF project

– Planned initiation April 2016

• ISO structured cabling standard revision

– Draft 11801 ed.3 added WBMMF cable, contingent on IEC spec maturity

• For Fibre Channel and Ethernet

– 128GFC Gen 2, 256GFC, … and 100GE, 200GE, 400GE, …


Benefits of SWDM and WBMMF• Wavelengths used to reduce number of fibers

– Good trend for improving MMF utility

– SWDM utility is more limited on OM3 or OM4 at high lane rates

• Deliver sufficient bandwidth over wavelength spectrum – to support > 100G per fiber to at least 100 m


Goals and benefits: retain legacy application support of OM4 increase capacity to > 100G per fiber reduce parallel fiber count by factor of 4 boost array cabling capacity for parallel apps enable Ethernet:

40G-SR, 100G-SR, 200G-SR, 400G-SR4 enable Fibre Channel:

128GFC-SWDM, 256GFC-SWDM extend MMF utility as universal medium

Application Evolution Map


parallel fiber transmission

WDM transmission

WDM + parallel transmission

Legend

4λ WDM enablingfactor of 4 fiber count

reduction

*Parallel fibers remain essential to support break-out functionality

Data Rate

10GNRZ

ParallelTX RX

25GNRZ

ParallelTX RX

50G PAM4

ParallelTX RX

10, 25, 50G WDM & ParallelTX RX

N/AN/A40G

100G

400G

200G

Imagine running 10G, 40G, 100G, 200G

over the same WBMMF cable plant using duplex LC connections *

WBMMF Spec Framework

• Wavelength range is central to WBMMF specification– although WBMMF standard does not specifically set WDM plan

• What is clear from the outset:– Legacy application support dictates inclusion of 850 nm wavelength

– Move towards longer wavelengths to gain improvements from lower chromatic dispersion, lower attenuation, faster VCSELs

– Four wavelength bands are ideal complement to four-lane parallel

• Transceiver vendors say low-cost WDM needs ≥ 30 nm pitch– Accommodates low-cost manufacturing tolerances, temperature variation,

spectral width, low-complexity filters

• TIA TR-42 put this all together to determine– shortest wavelength and wavelength range

– required fiber bandwidth across spectrum by applying Ethernet and Fibre Channel transmission models


Bandwidth-Wavelength Relationships


0

1,000

2,000

3,000

4,000

5,000

750 775 800 825 850 875 900 925 950

Ban

dw

idth

(M

Hz·k

m)

Wavelength (nm)

Worst-case OM4 total bandwidth analysis

Modal BW

Chromatic BW (0.6nm)

Total Bandwidth

Basic Requirements & Indications

Must retain legacy 850 nm application support.

Wavelengths > 850 nm benefit fromincreasing chromatic bandwidth and improving VCSEL capability.

Must support at least 4 wavelengths.

Low-cost WDM needs ~30 nm spacing.

Resulting target wavelength region: ~840 nm to ~950 nm

Bandwidth improvement is needed to raise total bandwidth to that at ~840 nm

over target wavelength region.

Transmission Performance at 100 m


*

* 980nm VCSELs readily available for transmission tests and extract near-worst-case bandwidth effects.

Compare the left plot at 850 nm to the right plot at 980 nm, noting their different x-axis scales. Notice how the lines for the two OM4 fibers move significantly up and to the right, indicating that transmission impairments have substantially increased at 980 nm for OM4. But the two WBMMFs plotted in red remain comparatively similar at 980 nm to their 850 nm performance showing their ability to well support a very useful range of wavelengths.

Demo at OFC 2015


• 4λ, each at 25.78 Gb/s– Finisar SWDM concept transceiver (4 SFPs mu’xed together)– Nominal 850, 880, 910, 940 nm wavelengths– WBMMF meeting TIA-492AAAE specification– > 100 Gb/s over single-fiber channel– 225 m reach (50 m + 75 m + 100 m spools) – Error-free without FEC assistance– Enabling FEC would have permitted longer reach

Additional Demos


Las Vegas, USASeptember 2015

40G over 500m 100G over 300m

Fall BICSI

Valencia, SpainSeptember 2015

Dubai, UAEOctober 2015

ECOC

GITEX

100G over 300m

Fully integrated FinisarWDM transceivers in all demos

Go to OFS booth to see live

Summary

• The industry is moving to utilize SWDM– Transceivers, fibers, cabling

• WBMMF will optimize the reach of SWDM solutions– While retaining support for 850 nm legacy applications at OM4 reaches

• Applications provide opportunities to seed these technologies– Ethernet and Fibre Channel

• SWDM & WB technologies extend the utility of MMF– Continuing legacy of delivering lowest-cost optical solutions

over the universal data-comm transmission medium that is MMF


Thank You


ETHERNET FIBER OPTIC CABLING TRENDS: STRUCTURED CABLING

Brett Lane – Director of Technology, Panduit

OFC 2016

March 23, 2016

… & while we’d all welcome it if everybody appreciated structured cabling…

• In a maturing market, the focus is even greater…

– Business Problems: Maximize RoA and Maintain Compliance (& security)

– Opportunities:• Small

• Agile

• High Performance

• Cost Efficient


• Reliable

• Energy Efficient

• Meets Code

Structured Cabling & Business Problems

Architectures…


• Multinational Financial Institution– Regional DC

• ~ 2500 SF of White Space – Raised Floor

• Tier 3• Hot/cold aisle configuration• ~100 total cabinets

– ~2000 servers on Day 1

• Per Cabinet Power consumption~8kW (20kW)

• Heterogeneous Storage and Compute Equipment

Small

Reliable

High Performance

Cost Efficient

Meets Code

Agile

Structured Cabling• Cabling…

– Server, Intra, Adjacent-Rack Connections

• Copper media & connectivity continue to shine

– More Later!

– Switch, Inter-Rack Connections

• Single-mode Fiber (SMF) and connectivity

• Multimode Fiber (MMF) and connectivity

– Relaxed opto-mechanical tolerances

• What market segment?


Source: BSRIA Global Data Centre 2014 End-User Survey, Jan 2015

MMF Application Roadmap


Source: http://www.ethernetalliance.org/roadmap/


Application10GBASE-

SR

25GBASE-

SR

40GBASE-

SR4

100GBASE-

SR10

100GBASE-

SR4

Data Rate 10 Gbps 25 Gbps 40 Gbps 100 Gbps 100 Gbps

IEEE Std 802.3ae 802.3by 802.3ba 802.3ba 802.3bm

Form Factor SFP+ SFP+ QSFP+ CFP, CXP QSFP28, CFP4

Fiber Type OM3/4 OM3/4 OM3/4 OM3/4 OM3/4

Reach* 300/400m 70/100m 100/150m 100/150m 70/100m

# of Fibers 2 2 12 (8 used) 24 (20 used) 12 (8 used)

Connectors

Duplex LC Duplex LC 12f MPO 24f MPO (2 x 12) 12f MPO

Schematic

4 x 25 4 x 254 x 10 4 x 10 10 x 10 10 x 101 x 10 1 x 10 1 x 25 1 x 25

MMF Application& Component Roadmap

50GBASE-

SR

50 Gbps

802.3

SFP28

OM3/4

70/100m

2

LC Duplex

1 x 50 1 x 50

100GBASE-

SR2

100 Gbps

802.3

SFP28

OM3/4

70/100m

12 (4 used)

12f MPO

2 x 50 2 x 50

200GBASE-

SR4

200 Gbps

802.3

QSFP28

OM3/4

70/100m

12 (8 used)

12f MPO

4 x 50 4 x 50

Technology Cornerstones

– Form Factor: SFP, QSFP

– Laser-Optimized MMF

• SMF

– Single & Multi-fiber (MPO)

– Higher Speed Modulation

• OOK

• PAM4, etc

– Spatial Multiplexing (Parallel Optics)

– Wavelength Multiplexing

• Bi-Directional

• SWDM


While Fiber Cabling km rises slowly…

CRU-2014

1

10

100

1000

2013 2014 2015 2016 2017 2018

M$

MMF LC

MMF MPO

& the CAGR of MPO is roughly 2x of LC

And more on the technology a little bit later…

InfrastructureCornerstone Components


Structured Cabling Solves Business Problems

• Small– More space for active gear

– Energy Efficient

• Agile– Reconfigurable

– Data rate migration

– Breakout (e.g. 4 x 1)

• High Performance– Data rate migration

– Reliable

– Operable

Fiber Cabling Systems& Business Problems


ETHERNET FIBER OPTIC CABLING TRENDS: LOWER COST TOR INTERCONNECTGreg McSorley, Amphenol Corp.

OFC 2016

March 23, 2016

TOR need affordable solutions

• Growing need for TOR lower cost solutions

– Data Center’s are getting larger, costs growing

– Most link length's less than 30m and many of those are under 3m

– Lower power per interconnect saves overall power consumption


Simple TOR Configuration


Worst case length4’ across7’ down2’ across2’ to backTotal 5.1m

Cost Example


40Gb, QSFP, 5mDAC $ XAOC $ 2.8XTransceivers $ 7.2X(2 transceivers + LC fiber jumper)

100Gb, QSFP, 5mDAC $ XAOC $ 2XTransceivers $ 8.5X(2 transceivers + MPO Fiber Jumper)

AOC DAC2 Transceivers and

fiber

Cost Example, Breakout Cables


40Gb, QSFP, 5m SplitterDAC $ XAOC $ 1.5XTransceivers $ 3.6X(1 QSFP + 4SFP transceivers + MPO to 4 LC fiber jumper)

100Gb, QSFP, 5m SplitterDAC $ XAOC $ 1.2XTransceivers $ 5.8X(1 QSFP + 4SFP transceivers + MPO to 4 LC fiber jumper)

AOC DAC5 Transceivers and fiber interconnect

Advantages

• For TOR designs, DAC attach and AOC’s offer a significant cost savings

– One cable vs 2 transceivers, plus jumper cable

– Single part number for each interconnect

– Ease of configurations and reconfiguring

– No cleaning of the optic interface

– Less Expensive

– Less system power required


If you have any questions or comments,

please email [email protected]

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ETHERNET FIBER OPTIC CABLING TRENDS › wp-content › uploads › 2016 › ... · Ethernet Fiber Optic Cabling Trends • Moderator –Doug Coleman, Manager of Technology and Standards,