conference & convention enabling the next generation of networks & services Benefits of 40/100G in Submarine Systems M. Nissov, A. Pilipetskii, Q. Zhong, C. Breverman, G. Valvo, B. Jander, and N. S. Bergano Tyco Electronics Subsea Communications
conference & convention enabling the next generation of networks & services Presenter Profile Morten Nissov is presently the Director of 40/100G Product Management at SubCom. He has worked for SubCom since 1998, first as an Engineer (1998-2000) and then as Director Applied Research (2000-2009). as Director Applied Research (2000-2009). He received his MS and PhD degrees from the Technical University of Denmark in 1994 and 1998, respectively, and his MBA from New York University, Stern School of Morten Nissov Business, in 2009. Director 40/100G Product Magement Email: mnissov@subcom.com Tel: (+1) 732-578-7587
conference & convention enabling the next generation of networks & services Contents • Introduction • Motivation for Higher Data Rates • Necessary Trade-offs • Necessary Trade-offs • Outlook • Conclusion
conference & convention enabling the next generation of networks & services Introduction • 10G technology prevalent but 40G technology seriously being considered – 40G technology might have reached turning point • Benefits – Primary: increased capacity and reduced cost per bit – Primary: increased capacity and reduced cost per bit – Secondary: floor space and power consumption • N x 10G muxponders allow the benefits to be enjoyed also for 10G client traffic • Trade-offs associated with higher data rates is the topic of this talk
conference & convention enabling the next generation of networks & services Capacity and Cost Drive Demand • Increased capacity – Better amortizes cost of construction of a new cable system – Increases value (and economic life) of legacy systems – Enablers: modulation formats, signal processing • Reduced cost per bit – Reduces cost of upgrades – Improves competitiveness – Lowers operating expenses – Enablers: more bits share cost of equipment
conference & convention enabling the next generation of networks & services Illustration of Potential 2-5x Capacity Increase Capacity comparison of 10G DPSK, 40G DPSK, and 100G DP-QPSK •Capacity increase – 40G DPSK: 2x – 100G DP-QPSK: 5x •Optimized design to 10G 10G maximize capacity maximize capacity 100G DP-QPSK •Depends on specifics for legacy systems 40G DPSK •Capacity might actually decrease on most challenging systems
conference & convention enabling the next generation of networks & services Change of Data Rate Can Happen Quickly •After 10G Change from 2.5G technology to 10G technology availability interest disappeared in 2.5G 60 50 month 10G 2.5G Transponders per mo •Only legacy 40 upgrades left for 30 2.5G after 2000 20 10 0 Feb- Aug- Feb- Aug- Feb- Aug- Feb- Aug- Feb- Aug- 99 99 00 00 01 01 02 02 03 03
conference & convention enabling the next generation of networks & services Higher Data Rates Provide Savings over System Life Life time savings of 40G direct detection • Substantial savings for system compared to 10G system both traffic scenarios 40G: larger traffic needs – Years to full load Lifetime Savings gs • Large: 10 years • Large: 10 years 40G: smaller traffic needs 40G: smaller traffic needs • Small: 20 years • Assumptions – Same ultimate capacity – 40G provide terminal savings 10G references • Savings much larger for Regional Trans-Atlantic Trans-Pacific high capacity systems System Reach
conference & convention enabling the next generation of networks & services Flexible Client Interfaces Protects Investment • Client interface preference expected to change – SDH � Ethernet, OTN, OTNe – 10G client traffic � 40G � 100G • Solution • Solution – Reconfigurable multi-protocol clients – Replaceable client modules to accommodate Muxponder and Transponder application – Also simplifies sparing • Flexibility is needed to safeguard equipment investment
conference & convention enabling the next generation of networks & services Higher Data Rates Need Better OSNR •10G equipment well Shortened repeater spacing can provide the OSNR necessary for increased data rates optimized •Necessary OSNR Increase improvement by – Shorter repeater spacing – Shorter repeater spacing Repeater Count Inc – Lower loss and larger effective area fiber – Increased repeater power •All increases wet plant cost Regional Trans-Atlantic Trans-Pacific – Trade-off with terminal System Reach savings – 40G system might carry premium
conference & convention enabling the next generation of networks & services Different Modulation Formats Have Different Advantages • Prior, single terminal Many choices of modulation formats each with distinctive advantage product for all lengths • Present 10G generation SE=40% SE=40% 80% 80% 120% 120% 200% 200% – OOK Pacific Pacific Pa Pa – DPSK Distance Distance Atlantic Atlantic • 40/100G also need to provide different modulation formats Regional Regional RZ-DBPSK RZ-DBPSK RZ- RZ- Dual-RZ- Dual-RZ- OPDM-RZ- OPDM-RZ- DP-QPSK DP-QPSK DP-QPSK DP-QPSK DQPSK DQPSK DBPSK DBPSK DBPSK DBPSK (40G) (40G) (100G) (100G) • Cost-Reach-Capacity Complexity Complexity trade-off
conference & convention enabling the next generation of networks & services Coherent Transmission Holds Great Promise Coherent transmission can be substantially improved by optimized design •Coherent sensitive to nonlinear impairments 3 3 3 Optimized for Optimized for •Optimized designs 2 2 2 coherent coherent unlock potential (dB) (dB) (dB) Delta Q (dB Delta Q (dB Delta Q (dB 1 1 1 1 1 1 – Only large effective Only large effective area positive fiber (no 0 0 0 DFF) -1 -1 -1 – Only supports coherent Legacy Legacy transponders -2 -2 -2 •Initial applications -2 -2 -2 0 0 0 2 2 2 4 4 4 6 6 6 Relative Launch Power (dB) Relative Launch Power (dB) Relative Launch Power (dB) – 100G Regional – 40G Transoceanic
conference & convention enabling the next generation of networks & services Conclusion • Submarine market has reached turning point – 40G (and selective use of 100G) will add significant value – Enabling capacity increases and lifetime cost reductions • Direct detection provides all the benefits on present system designs – Upgrades of long legacy systems – Upgrades of long legacy systems – New DFF systems • Full coherent benefit only achieved on D+ only systems • 10G optimization might provide lowest initial cost – But could preclude operating at higher data rates • Client flexibility facilitates the transition from the data rates and protocols of today to those of tomorrow
2010 conference & convention enabling the next generation of networks & services The 7th International Conference & Convention on Undersea Telecommunications Pacifico Convention Plaza Yokohama & InterContinental The Grand Yokohama 11 ~ 14 May 2010 www.suboptic.org
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