Fiber Optic Om3 y Om4

Data Center Optical Connectivity with Bend-Optimized OM3/OM4 Multimode Optical Fiber Doug Coleman Corning Cable Systems Manager, Technology & Standards

Data Center Environment

Data Center Environment • • • • • Higher speeds Higher density Higher reliability Lower capex Lower opex

Data Center Environment

10G Optical Connectivity CIR 2009 Market Report Forecast
• Relatively few10GBASE-T connections will be deployed in the next five years compared with what was originally expected • Emergence of a sub-1W low-cost 10G SFP+ optical transceiver will enable large volume data center optical storage and data networks. • Ability of the SFP+ form factor to support short reach twinaxial copper connections will dampen the need for a 10GBASE-T solution

Data Center EnvironmentExpect lower-cost solutions in data center networks will remain at 850 nm

Relative Cost

• 850 nm 10G VCSELs entering 3.5 high-volume manufacturing 3.0 cycle – Low-cost solution for 10G 2.5
2.0 1.5 1.0 0.5 0.0

10G Transceivers
850 nm optics 1300 nm optics

Vertical Cavity Surface Emitting Laser

2004 2005 2006 2007 SFP+ OM3 100m SFP+ OM3 300m SFP+ SMF 10km

2008 2009 $400 $500 $1000Data Center Environment
80% 70% 60% 50% 40% 30% 20% 10% 0% 2004 2005 2006 2007 2008
Source: CCS

OM3 OM2 OM1 SMF

Data Center Environment
Laser-optimized 50 Micron Fiber (OM3) • Core Size: 50 Micron • Attenuation: 3.0/1.5 dB/km @ 850/1300 nm • Bandwidth:
– OFL: – EMB: 1500/500 MHz•km @ 850/1300 nm 2000 MHz•km @ 850 nm

Data Center Environment
TIA OM4 Standard Approved August 2009.Laser-optimized 50 Micron Fiber (OM4) • Core Size: 50 Micron • Attenuation: 3.0/1.5 dB/km @ 850/1300 nm • Bandwidth: – OFL: 3500/500 MHz•km @ 850/1300 nm – EMB: 4700 MHz•km @ 850 nm • No transmission protocol utilizes the 3500 MHz-km OFL BW – OFL BW utilized by fiber manufacturers who rely on DMD masks to validate the 4700 MHz-km EMB

Standard Specified Distances 850 nm Ethernet Distance (m) 1G10G 40G 100G OM3 1000 300 100 100 OM4 1000 550 125 125 850 nm Fibre Channel Distance (m) 4G 8G 16G OM3 380 150 100 OM4 480 190 125

Bend-Optimized OM3/OM4 Multimode Fiber

Macrobending in Multimode Fibers
• Multimode optical fiber has many modes of light traveling through the fiber • As each of these modes moves closer to the edge of the core, it is more likely to escape, especially if thefiber is bent • As the bend radius is decreased, the amount of light that leaks out of the core increases
Core Dissipation of energy

Cladding

Bend-Optimized OM3/OM4 Multimode Fiber Technology
• Bend-optimized multimode fiber, which is capable of confining almost all the energy of the different modes, even in the most challenging bending scenarios • Fiber utilizes a specially engineeredoptical trench to trap the energy in the many modes which propagate within the fiber core

The energy is confined inside the fiber

Bend Performance Comparison
• Study compared bend performance of conventional OM3/OM4 fibers with BOMMF OM3/OM4 • In all tests, BOMMF fiber performs significantly better than conventional OM3 fiber with existing macrobending specifications • BOMMF OM3/OM4 isspecified for use in tighter bends than all other conventional multimode fiber types
Bending Performance 20x 90° Turns < 10 mm Bend Radius
Typical bend performance of conventional OM3/OM4 fiber (OVD, MVCD and PVCD)

2.0 Average Bend Loss [dB]

1.5

New bend performance Benchmark

1.0

0.5

0.0 Supplier Supplier Supplier Supplier BOMMF “A” “B” “C” “D” OM3/OM4 Tested OM3/OM4 fibre typesSource: Corning study, test according to draft IEC60793-1-47

Bend-optimized OM3/OM4 fiber bend performance is a key enabler for high-density and operational margin
10

Macrobend loss 850 nm, 2 turns (dB)

ClearCurve® Delivers up to 10x improvement
1
Desire d Bend Radii

0.1

0.01 5 7 9 11 13 15 17 19 21 23 25

Bend Radius (mm)

Multimode Std IEC 60793-2-10
Bend Radius Number of...