Advances in optical amplifier technologies
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1 Advances in optical amplifier technologies TF-NGN, Lisboa, 30 Sep 2004 Roland Leners
2 Outline Past Present Future of optical amplifiers for long distance networks Slide 2
3 A build example Düsseldorf Paris Slide 3
4 A build example Amsterdam Rotterdam Lille Brussels Düsseldorf Paris Slide 4
5 A build example PAR LIL BRU ROT AMS DÜS 300km 150km 200km 100km 250km The 1980 s PDH/SDH regenerator PDH/SDH terminal Slide 5
6 A build example PAR LIL BRU ROT AMS DÜS 300km 150km 200km 100km 250km The 1980 s PDH/SDH regenerator PDH/SDH terminal The 1990 s EDFA SDH/WDM terminal Slide 6
7 A build example PAR LIL BRU ROT AMS DÜS 300km 150km 200km 100km 250km The 1980 s PDH/SDH regenerator PDH/SDH terminal The 1990 s EDFA SDH/WDM terminal Early 2000 s SDH/WDM/XC terminal Slide 7 EDFA/Raman OADM
8 Optical amplifier trends over the last decade Performance Reach: Several 100 km s to several 1000 km s Capacity: 4x2.5G λ s to 160x10G λ s (R)OADM support Cost EDFA: > 5000/λ to < 1000/λ (1996-present) Raman: > 5000/λ to < 1000/λ (1999-present) Interworking Coloured LR optics on SDH ADM s and XC s Slide 8
9 LileParis Next steps in performance All Optical Networks Hut Skipped Networks HAM Amsterdam ROT AMS BER Rotterdam LIL PAR BRU STR DÜS FRA PRA NÜR OADMs only Lille Brussels Düsseldorf ZÜR No inline amplifiers LYO MIL Paris Slide 9
10 LileParis Next steps in performance All Optical Networks Amplifier requirements Very low noise (~0dB) Moderate gain (~15dB) Moderate dynamic range (~5dB) Raman only Network requirements Very high capacity (>100 Gb/s per route) Long circuits (>2000km) Hut Skipped Networks Amplifier requirements Low noise (<3dB) High gain (>30dB) Large dynamic range (>10dB) Hybrid EDFA/Raman Network requirements Moderate capacity (<100 Gb/s per route) Shorter circuits (<1000km) Slide 10
11 Hut Skipping «Rule of thumb» 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Typical inline amplifier site reduction (%) Hybrid vs. Raman only Hybrid vs. EDFA only (Traditional) Route length (km) Slide 11
12 Economics of Hut Skipping (~650km link) Traditional HSA Opex (4 yrs) Capex Slide 12
13 Traditional WDM system engineering EMS interface Element Management System Client (e.g. Router) TxRx TxRx Mux Demux Mux Demux Amplifiers Client (e.g. Router) Single vendor domain Slide 13
14 Open WDM system engineering EMS interface Umbrella Element Management System Client (e.g. Router) TxRx TxRx Mux Demux Mux Demux Amplifiers Client (e.g. Router) Multiple vendor domains Example: Strategy pursued by 40G transponder vendors for upgrading existing links Slide 14
15 Open WDM system engineering EMS interface Umbrella Element Management System Client (e.g. Router) TxRx TxRx Mux Demux Mux Demux Amplifiers Client (e.g. Router) Multiple vendor domains Example: Strategy pursued by Optovia Slide 15
16 Open WDM system engineering EMS interface Umbrella Element Management System Mux Demux Mux Demux Amplifiers Client (e.g. Router) Slide 16 Multiple vendor domains Early examples in the SDH world Next logical step in the IP/WDM world!? Client (e.g. Router)
17 How can an amplifier support Open WDM systems? Flexible link engineering Compatibility with broad range of TxRx settings Transparency to modulation formats (NRZ, RZ, xpsk, ) Compatibility with any kind of DCM Easy to use link engineering tool Optical Supervisory Channel interworking Compatibility with OSC of client system EMS integration Integrability into 3rd party NMS Integrability into EMS of client system (WDM, XC, ) Autonomous EMS Slide 17
18 The road ahead The basic amplifier technology is available. Innovation will come from Integration of components (the «secret sauce» ) Standardization of ancillary functions Open WDM systems and advances in enabling technologies New fibre types New modulation formats «Super-Turbo» FEC chipsets Slide 18
19 Questions? Slide 19
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