Take a look at the slides presented by Jörg-Peter Elbers at this year's OFC event. These are all about the 100G Metro.

1. Jörg-Peter Elbers, VP Advanced Technology
OFC 2014 – Workshop M1A:
Low Cost 100G Interfaces for Metro: Standardized or Proprietary?
100G Metro –
Does One Size Fit All?

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What is 100G Metro?
Two classes: Efficient connectivity vs. high-performance networking
Application Reach OADMs
10G
Legacy
Fiber
Cost
Enterprise 100 km None Yes
Metro Access 250 km Few Yes
Metro Core 500 km <20 Some
Regional 1000 km <10 No
Long-Haul 2500 km <5 No
Class1Class2

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Efficient connectivity:
„Scale up from datacom“
Leverage:
• 100GBASE-LR4 ecosystem
• 10G DWDM transmitters
Solution:
• 100G Direct Detect
• 4x28G DWDM
Sweet Spot:
• P2P interconnects
100G Metro Strategies
High-performance networking:
„Scale down from LH telecom“
Leverage:
• OIF 100G LH DWDM framework
• Relaxed specifications
Solution:
• 100G Coherent
• DP-QPSK
Sweet Spot:
• Metro networking
Pick according to application: lower cost & power vs. higher performance.

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• Drivers: Economies of scale and interoperability
• Economies of scale need:
• High volume components, few variants
• Stable component eco-system
• Interoperability needs:
• Standardization of optical parameters
• Standardization of framing and FEC
• Challenge: Innovation is moving faster than standardization
• Standards can lead to lower performance and increase cost
• Interoperability is not required in all applications
What About Standards?

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Efficient connectivity:
„Scale up from datacom“
What Comes Next? – 400G
High-performance networking:
„Scale down from LH telecom“
Evolution to more capacity, programmability and lower cost per bit.

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Main Takeaways
• 100G Metro – One size does not fit all
• Two regimes exist within the metro segment
• These are best served by two solutions: direct detect & coherent
• Both will continue to evolve to reduce power, footprint & cost
• Economies of scale & innovation is required – full standardization???

7. jelbers@advaoptical.com
Thank you
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