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Driving the Optical Reboot: Technical Advances Towards Terabit Networking

Driving the Optical Reboot: Technical Advances Towards Terabit Networking. Geoff Bennett Director, Solutions & Technology. What is the “Optical Reboot”?. C oined by Andrew Schmitt from Infonetics

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Driving the Optical Reboot: Technical Advances Towards Terabit Networking

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  1. Driving the Optical Reboot: Technical Advances Towards Terabit Networking Geoff Bennett Director, Solutions & Technology

  2. What is the “Optical Reboot”? • Coined by Andrew Schmitt from Infonetics • Describes the transformation (as opposed to evolution) of optical transport networks in response to an exponential growth in demand • Characteristics include: • The move to coherent transmission • The need for integrated OTN switching • The need for CDC ROADM technology • The need for a dynamic control plane (eg. GMPLS) This will be the focus for my presentation

  3. Agenda • Coherent technologies enable 100Gb/s transmission, with outstanding reach and spectral efficiency • But how do we continue to scale the operational aspects of coherent technology? • Moving beyond 100Gb/s per channel • Coherent super-channels • Engineering the “ideal super-channel” • The move to multi-carrier • The role of photonic integration

  4. The “miracle” of coherent transmission 10Gb/s per channel 80 channels = 800Gb/s 100Gb/s per channel 80 channels = 8Tb/s A simple transmitter, and even simpler detector with no significant signal processing A complex transmitter, and even more complex detector with very significant signal processing Tx Laser Tx Modulator Rx Photodetector Rx

  5. Internet demand is growing at 30-40% CAGR:How do we go “Beyond 100G”? 100Gb/s Coherent Technology Wait for the electronics to “catch up” Competitive disadvantage Today the opto-electronics does not have the power to sample beyond about 32GBaud Use “higher order” modulation (eg. 16QAM) to take the load off the electronics 16QAM is a “metro reach” modulation Complementary techniques Delivers 100Gb/s, single carrier, PM-QPSK with 3,000km reach Use multi-carrier super-channels Broad industry consensus that super-channels are the way forward for >100G

  6. Moving to multi-carrier super-channels Single Carrier Dual Carrier Ten Carrier 500Gb/s SC-PM-QPSK 500Gb/s DC-PM-QPSK 500Gb/s 10C-PM-QPSK 190 GHz 190 GHz 190 GHz 2 Lasers 8 modulators 80Gbaud Electronics Time to Market: ~5 years 1 Laser 4 modulators 160Gbaud Electronics Time to Market: ~7 years 10 Lasers 40 Modulators 16GBaud electronics Time to Market: NOW Must be spectrally efficient, and possible to manufacture

  7. Controlling the “Component Explosion”:The Power of Large Scale PICs • Coherent Super-Channel Tx circuit is complex • Coherent Super-Channel Rx circuit is even more complex • Unless… >600 • Optical Functions Integrated ~250 • Fiber Connections Eliminated

  8. PICs Deliver Massive Capacity:With Lower Power and Space Coherent (Electronics) Optical (Photonics) 500G Module Example FlexCoherent™ Processor (FCP) 3rd Gen 500G PIC .78W / Gbs SUPER MZ SUPER MZ SUPER MZ SUPER MZ SUPER MZ SUPER MZ SUPER MZ SUPER MZ Conventional Solution Coherent ASIC 2.8 W / Gbps Infinera est. for currently avail. product operating at 25°C 3rd party optics

  9. PICs deliver performance without compromise • Industry leading performance • Peak PMD tolerance to 500ps • Tolerant to high speed PMD transients • 10,000 rad/s + Rahn, J.; Sun, H.; Wu, K.T.; Basch, B.E. IEEE Journal of Lightwave Technology, 2012, Issue 99: Real-Time PMD Tolerance Measurements of a PIC Based 500Gb/s Coherent Optical Modem 500G Tx Module 500G Rx Module

  10. Scalingwith FlexCoherent Super-Channels • Software Selectable Ability to optimize reach vs. capacity on a given link • Per super-channel modulation format control 6000 3000 PM-8QAM PM-QPSK 1500 700 PM-16QAM PM-BPSK Reach Capacity Infinera: Leading the way forward in coherent technology

  11. Without Super-Channels • Bulky • Power-hungry • Does not scale operationally The way 500Gb/s is brought into service today 100G Line Card 100G Line Card 100G Line Card 100G Line Card 100G Line Card

  12. With Super-Channels A super-channel implements multiple carriers - ideally in a single line card… All carriers provisioned in single operational cycle… It’s practical to build… Line Card It has excellent optical performance And is seen as a single unit of capacity by the services that use it

  13. Heavy Reading White PaperAvailable free at : www.infinera.com/solutions/whitepapers.html “As suppliers look to 100G and beyond, we are hearing an increasing consensus among them that the super-channel is the best solution.” “As we move to the 100G era and beyond, the use of photonic integration becomes more pervasive and, ultimately, mandatory.” Sterling Perrin Senior Analyst, Heavy Reading

  14. The Submarine Networking Reboot:Match Transmission Capacity to Useful Cable Life Useful life of typical submarine cable 25-30 years 30% CAGR for 25 years >700 times increase but… “Evolution” of the line system can only deliver a limited increase in capacity – to meet predicted demand increase, an “optical reboot” is essential Original submarine line system Phase 1 upgrade 2.5G->10G Phase 2 upgrade 10G – 100G

  15. CANALINK Network Deployment CT SEV-TELVENT CT SEV-ADIF PENINSULA Phase 1 PIC-based line system delivers ~10X capacity increase CT ROTA CT JEREZ LA BALLENA BMH CT CONIL CONIL BMH CT CALP ASILAH BMH MARRUECOS BAJAMAR BMH CT GUIMAR TINOCA BMH LA PALMA CANDELARIA BMH CT GRANADILLA (NAP D-ALiX) CT NOBEL GRANADILLA BMH CT EL GORO OJOS DE GARZA BMH TENERIFE GRAN CANARIA

  16. Line System Upgrades are Growing Rapidly Mediterranean >4000km Asia Regional >16000km Japan 450km 40/100G Trials (Subset) S. America >20,000km Americas >25,000km Pacific Coast >7000km Trans-Atlantic >6000km Trans-Atlantic >13,000km Middle East >10,000km

  17. NREN Backbone Reboot: DANTE GEANT3 Infinera DTN-X 500G, PIC-based, super-channel line cards Up to 1Tb/s per slot in chassis 5Tb/s non-blocking OTN switch Evolution to MPLS-TP Up to 8Tb/s per fiber (C-Band)

  18. Summary: What I talked about today • The optical reboot is about revolution, not evolution • A move to coherent transmission produces at least a 10X improvement in spectral efficiency, and usually an improvement in optical reach • Super-channels offer a way to scale network operations for coherent technologies • 5X or 10X the backbone capacity for the same operational effort • Photonic integration is essential for the implementation of practical super-channels

  19. Summary: What I did not talk about today • Integrated switching is vital part of the optical reboot • Essential for the efficient use of 100G and super-channel capacity • Enables effective control planes • ROADM technology is in a state of flux today • Ongoing challenge to deliver full CDC economically • About to encounter the move from fixed grid to flexible grid • Dynamic control planes drive down OpEx • But they require digital switching to work effectively • GMPLS is the proven technology today • SDN looks like it can solve several interesting problems, but is immature in the context of transport networks

  20. Thank You Geoff Bennett gbennett@infinera.com

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