Download as PDF, PPTX
![© 2015 Xtera Communications, Inc. Proprietary & Confidential 16
[Capacity – Reach] in Unrepeatered Links](https://image.slidesharecdn.com/20150623superopticallayerwdmnice2015-151126003720-lva1-app6892/85/2015-06-23-super-optical-layer-wdm-nice-2015-16-320.jpg)
![© 2015 Xtera Communications, Inc. Proprietary & Confidential 29
[Capacity – Reach] Metric Enabled by
Xtera’s Wise RamanTM in Terrestrial Networks
240 x 100G
• 100 nm spectrum
• PM-QPSK 100G carriers with
50 GHz channel spacing
• 2 bit/s/Hz spectral efficiency
120 x 400G
• 100 nm spectrum
• PM-16QAM 200G carriers
spaced 50 GHz apart
• 4 bit/s/Hz spectral efficiency
160 x 400G
• 100 nm spectrum
• PM-16QAM 200G carriers
spaced 37.5 GHz apart
• 5.3 bit/s/Hz spectral efficiency
16QAM on more than 2,000 km of aged terrestrial fiber (0.28 dB/km)](https://image.slidesharecdn.com/20150623superopticallayerwdmnice2015-151126003720-lva1-app6892/85/2015-06-23-super-optical-layer-wdm-nice-2015-29-320.jpg)
![© 2015 Xtera Communications, Inc. Proprietary & Confidential 30
[Capacity – Reach] Metric Enabled by
Xtera’s Wise RamanTM in Terrestrial Networks](https://image.slidesharecdn.com/20150623superopticallayerwdmnice2015-151126003720-lva1-app6892/85/2015-06-23-super-optical-layer-wdm-nice-2015-30-320.jpg)
Uploaded byXtera Communications
2015 06 23 super optical layer wdm nice 2015
The document discusses advancements in optical networking, focusing on the importance of long spans enabled by technologies such as 16QAM and Raman amplification. It highlights recent technical improvements that support longer transmission distances, along with examples of implementation in various network types, including emerging regions and the oil and gas industry. Additionally, it presents Xtera's Wise Raman solution as a key enabler for enhancing optical network capacity and reach.
More Related Content
Similar to 2015 06 23 super optical layer wdm nice 2015
2015 06 23 super optical layer wdm nice 2015
- 1. © 2015 XteraCommunications, Inc. Proprietary & Confidential 1 Super Optical Layer Enabled by 16QAM and Raman Technologies Bertrand Clesca – Head of Global Marketing – Xtera Communications 23 June 2015 Next Generation Optical Networking 2015 (22-25 June 2015 – Nice, France)
- 2. © 2015 XteraCommunications, Inc. Proprietary & Confidential 2 Content: • Why Long Spans Matter • Recent Technical Improvements Enabling Longer Span (and Reach) • Example of Implementation • Raman Amplification, Key Enabler for 16QAM
- 3. © 2015 XteraCommunications, Inc. Proprietary & Confidential 3 Why Long Spans Matter
- 4. © 2015 XteraCommunications, Inc. Proprietary & Confidential 4 • Very meshy network with a lot of traffic locations • Fibers owned, plenty of dark fibers available Traditional Telecom Network
- 5. © 2015 XteraCommunications, Inc. Proprietary & Confidential 5 • Very sparse network with very few traffic locations long reach • Fiber leased, but large pipes needed between few sites • Technical/commercial benefits from site skipping long spans Data Center Operator Network
- 6. © 2015 XteraCommunications, Inc. Proprietary & Confidential 6 • Technical + commercial innovations • Instead of having back-to-back terminal equipment in red sites, long span capabilities enable to deploy optical line amplifiers in red sites or to skip some of these red sites. Backhaul Networks for Subsea Cable Systems London Dublin
- 7. © 2015 XteraCommunications, Inc. Proprietary & Confidential 7 • Network made of leased fibers with few traffic locations • Sparse population distribution and power availability issues long spans Emerging Region Network
- 8. © 2015 XteraCommunications, Inc. Proprietary & Confidential 8 • Optical networks built over power grids • By design, the fiber is routed to the foot of the transmission tower at very few locations long spans OPGW Network
- 9. © 2015 XteraCommunications, Inc. Proprietary & Confidential 9 • Example in Papua New Guinea: Long spans imposed by the location of the liquid gas fields and plants • Valid also for off-shore (and onshore in Middle East) oil rigs Oil & Gas Industry’s Network Hides Gas Conditioning Plant Kopi Scraper 266 km Port Moresby 436 km LNG plant
- 10. © 2015 XteraCommunications, Inc. Proprietary & Confidential 10 • New types of telecom networks with very few traffic locations – New players – DC/PoP-to-DC/PoP network with subsea piece in the middle • Deserts, mountains, rain forest or tundra are all examples of areas where intermediate amplifier sites can be prohibitively expensive to build, power, maintain and keep secure. – Telecom networks in emerging countries with sparse populations distribution and power availability issues – Optical networks built over power grids – Oil & gas industry Why Long Spans Matter?
- 11. © 2015 XteraCommunications, Inc. Proprietary & Confidential 11 Recent Technical Improvements Enabling Longer Span (and Reach)
- 12. © 2015 XteraCommunications, Inc. Proprietary & Confidential 12 Optical Transmission Over Long Span Too High Power: Nonlinear Limitation Input eye diagram (NRZ signal) Output eye diagram Distance Perchannelpowerprofile Nonlinear limitation Amplifier power boost Fiber attenuation Pulse compression (or distorsion)
- 13. © 2015 XteraCommunications, Inc. Proprietary & Confidential 13 Optical Transmission Over Long Span Too Low Power: Noise Limitation Optical amplifier noise Input eye diagram (NRZ signal) Output eye diagram Distance Perchannelpowerprofile Amplifier power boost Fiber attenuation Noise limitation
- 14. © 2015 XteraCommunications, Inc. Proprietary & Confidential 14 Optical Transmission Over Long Span Limitations on Both Sides Input eye diagram (NRZ signal) Output eye diagram Perchannelpowerprofile Nonlinear limitation Amplifier power boost Noise limitation Fiber attenuation Pulse compression (or distorsion) Optical amplifier noise Distance
- 15. © 2015 XteraCommunications, Inc. Proprietary & Confidential 15 Optical Transmission Over Long Span Raman Enabler: Line Fiber Becomes An Amplifier Distance Perchannelpowerprofile Fiber attenuation Backward gain Forward gain Backward Raman pumping Forward Raman pumping Adequate eye opening for proper signal detection Input eye diagram (NRZ signal) Output eye diagram
- 16. © 2015 XteraCommunications, Inc. Proprietary & Confidential 16 [Capacity – Reach] in Unrepeatered Links
- 17. © 2015 XteraCommunications, Inc. Proprietary & Confidential 17 Raman-Assisted Transmission For Multi-Span Transport Distance Perchannelpowerprofile Lower limit: Optical noise accumulation Upper limit: Nonlinear distortions High peak-to- peak power excursion EDFA chain A B C D E F Power boost Fiber attenuation Much less breathing Higher noise performance Raman chain Lower non-linearity A Backward Raman pumping Forward Raman pumping Fiber attenuation Distributed Raman gain B C D E F Discrete amplifier
- 18. © 2015 XteraCommunications, Inc. Proprietary & Confidential 18 Raman-Assisted Transmission For Multi-Span Transport – All-Distributed Raman Distance Perchannelpowerprofile Lower limit: Optical noise accumulation Upper limit: Nonlinear distortions High peak-to- peak power excursion EDFA chain A B C D E F Power boost Fiber attenuation Further less breathing Higher noise performance All-distributed Raman chain Lower non-linearity A D Backward Raman pumping Forward Raman pumping Distributed Raman gain Fiber attenuation B C E F Loss due to Raman amplifier insertion loss
- 19. © 2015 XteraCommunications, Inc. Proprietary & Confidential 19 Example of Implementation
- 20. © 2015 XteraCommunications, Inc. Proprietary & Confidential 20 Power Grids Infrastructure Suitable for Optical Networks • OPGW cable between transmission towers • Not a telco network: – Long distances between intermediate ODF sites
- 21. © 2015 XteraCommunications, Inc. Proprietary & Confidential 21 Power Grids Infrastructure Suitable for Optical Networks • OPGW cable between transmission towers • Not a telco network: – Long distances between intermediate ODF sites – Telecom sites maybe off the power grid
- 22. © 2015 XteraCommunications, Inc. Proprietary & Confidential 22 Power Grids Infrastructure Suitable for Optical Networks • OPGW cable between transmission towers • Not a telco network: – Long distances between intermediate ODF sites – Telecom sites maybe off the power grid Very long spans
- 23. © 2015 XteraCommunications, Inc. Proprietary & Confidential 23 TIM Brasil Long Links with Ultra-Long Spans on OPGW Cables 1,161 km link Amazonas Project: 2,266 km network (1,835 km OPGW cable infrastructure) Manaus Gopa Macapá Belem Jurupari Fortaleza Salvador Tucuruí Puerto Velho Cuiabá 1,010 km link 1,645 km link TIM Brasil Long Links with Ultra-Long Spans on OPGW Cables
- 24. © 2015 XteraCommunications, Inc. Proprietary & Confidential 24 Ultra-Long Spans in 2,266 km Amazon Network (Highest Span Loss: 63 dB) ROADM 43 km 13.9 dB 237 km 53.8 dB 278 km 63.1 dB ILAILA ROADM 142 km 34.6 dB ILA 138 km 33.1 dB 235 km 53.5 dB ILA Villa Camburão ROADM 183 km 46.1 dB 141 km 33.9 dB 157 km 37.2 dB ILAILA ILA 91 km 23.8 dB ILA 229 km 52.8 dB ROADM 239 km 54.2 dB 110 km 27.2 dB ROADM ILA ILA 43 km 13.9 dB Manaus TIM Terra SantaManaus Rod Lexuga Silves Oriximiná Macapá TIM Jurupari Macapá Sub Laranjal do Jari Gopa XinguTucuruí Pacaja Vitória do Xingu Core amplifier Backward span extension module Forward span extension module G.652 fiber span
- 25. © 2015 XteraCommunications, Inc. Proprietary & Confidential 25 • Wise RamanTM solution backed by: – An unrivalled 17 years of tremendous and unique R&D experience – An unparalleled 11 years of commercial deployments worldwide • Wise RamanTM solution covers all the aspects of optical networks relying on Raman amplification: – Modeling – Photonics – Link engineering – Network design – Hardware – Firmware – Software – Network management Not simply the addition of third-party Raman pump modules to EDFA amplifiers that were designed for stand-alone usage! Wise RamanTM By Xtera Raman amplifier controller is key, and quite different from EDFA controller.
- 26. © 2015 XteraCommunications, Inc. Proprietary & Confidential 26 Raman Amplification, Key Enabler for 16QAM
- 27. © 2015 XteraCommunications, Inc. Proprietary & Confidential 27 100/200/400G Implementations Polarization Multiplexing (PM) Multi-level modulation format 25 Gbaud opto- electronics Dual-carrier implementation N-level modulation format + Coherent detection + Digital signal processing 25 Gbaud 200 Gbit/s100 Gbit/s 16QAM 200G PM-16QAM I Q 1011 1010 1101 1111 1001 1000 1100 1110 0010 0000 0100 0101 0011 0001 0110 0111 25 Gbaud 100 Gbit/s50 Gbit/s QPSK100G PM-QPSK 00 I Q 10 1101 l 400 Gbit/s 25 Gbaud 200 Gbit/s100 Gbit/s 16QAM 400G DC-PM-16QAM I Q 1011 1010 1101 1111 1001 1000 1100 1110 0010 0000 0100 0101 0011 0001 0110 0111 ≈ 50 GHz (or narrower)
- 28. © 2015 XteraCommunications, Inc. Proprietary & Confidential 28 • Higher OSNR requirement • Higher sensitivity on fiber nonlinearities Practical reach in real network environment with EDFA-based equipment: 600 km. • 400G or 1T channels are made, today, on the combination of 2 or 5 x 200G PM-16QAM carriers. • Higher-end line equipment is required to extend the optical reach of PM-16QAM carriers. 16QAM Challenges 25 Gbaud 200 Gbit/s100 Gbit/s 16QAM 200G PM-16QAM I Q 1011 1010 1101 1111 1001 1000 1100 1110 0010 0000 0100 0101 0011 0001 0110 0111
- 29. © 2015 XteraCommunications, Inc. Proprietary & Confidential 29 [Capacity – Reach] Metric Enabled by Xtera’s Wise RamanTM in Terrestrial Networks 240 x 100G • 100 nm spectrum • PM-QPSK 100G carriers with 50 GHz channel spacing • 2 bit/s/Hz spectral efficiency 120 x 400G • 100 nm spectrum • PM-16QAM 200G carriers spaced 50 GHz apart • 4 bit/s/Hz spectral efficiency 160 x 400G • 100 nm spectrum • PM-16QAM 200G carriers spaced 37.5 GHz apart • 5.3 bit/s/Hz spectral efficiency 16QAM on more than 2,000 km of aged terrestrial fiber (0.28 dB/km)
- 30. © 2015 XteraCommunications, Inc. Proprietary & Confidential 30 [Capacity – Reach] Metric Enabled by Xtera’s Wise RamanTM in Terrestrial Networks
- 31. © 2015 XteraCommunications, Inc. Proprietary & Confidential 31 Innovative Supplier Of Long-Haul Optical Transmission Infrastructure Aerial Terrestrial Submarine