Unrepeatered Systems: State of the Art State of the Art Hans - PowerPoint PPT Presentation

conference & convention enabling the next generation of networks & services Unrepeatered Systems: State of the Art State of the Art Hans BISSESSUR Alcatel-Lucent

conference & convention enabling the next generation of networks & services Presenter Profile H. Bissessur joined Alcatel-Lucent in 1989 and investigated components such as Place low-linewidth DFB lasers, multiplexers,… picture In 1999, he focussed on terrestrial here transmission systems, more especially on modulation formats. In 2002, he moved to modulation formats. In 2002, he moved to the development group to work on 40Gb/s terrestrial transmission. Since 2007, he leads the group of unrepeatered submarine systems. Hans BISSESSUR UR System Design Group Leader Email: hans.bissessur@alcatel-lucent.com Tel: (+33) 1 3077 7357

conference & convention enabling the next generation of networks & services Unrepeatered systems � No power feeding � No (electrically) active components in the cable � All pumps + signals are provided from the shore �������� ���� �������� ��������� ���� ���������

conference & convention enabling the next generation of networks & services UR configurations ��� ���� ���� �������� �������� ������������������ ��� ��� ��������� ��������� �������� �������� ���� ������� ��� ��� ��������� ��������� ��������� ������� ������� �������� �������� ���� ���� ��� ��� ��������� ��������� �������� �������� ���� ������� ��� ��� ��������� ��������� ���� ������� ������� ��� �������� �������� ���� ��� ��� ��������� ��������� � ���� Complexity increases with distance (loss)

conference & convention enabling the next generation of networks & services Unrepeatered systems � Raman/ROPA technology has been deployed all over the world; no operational problems (even at 6000 m) � Unavailability criterion of 5 min/year can be met � High order Raman deployed over various fibre types � High order Raman deployed over various fibre types Name CD Aeff For UR ( µ µ µ µ m 2 ) (ps/nm/km) G.652 NDSF 17 80 + G.653 DSF 0 50 - - (FWM, XPM) G.654 PSCF 18.5 75 + G.654 EPSCF 20.5 110 ++ (Aeff) G.655 NZDSF 4 to 6 50-70 - (XPM)

conference & convention enabling the next generation of networks & services Typical distances �&' � !�"���#������ $% ���� ���� ��������� ��������� ������� ������� ������������������� %) (& � & ( ) / ��������*������+����#�������������������,-�.

conference & convention enabling the next generation of networks & services Laboratory experiments ROPA Tx λ λ 1 λ λ Filter Tx λ λ λ λ 2 Mux Mu Rx Rx Tx λ λ 3 λ λ Pure Silica Core Fibre Tx λ λ λ λ 4 Raman Raman source source 1276 nm 1276 nm � Premium configuration for max distance � Close to the FEC limit (represents EOL situation)

conference & convention enabling the next generation of networks & services 3rd order Raman pumping �&2/��� �($ ��� �)' ��� 40 1480 nm 30 ���,�1�. ���,�1�. ���,�1�. 20 ����������0� ����������0� ����������0� 1390 nm 1390 nm P (dBm) 10 0 1275 nm -10 -20 �& �& �& �( �( �( �) �) �) �/ �/ �/ �% �% �% 80 60 40 20 0 Distance from receiver (km) 3�4������#�,��. 3�4������#�,��. 3�4������#�,��. � Energy transfer from 1275 to 1390 and 1480 nm

conference & convention enabling the next generation of networks & services Achievements Capacity Length (km) Loss (dB) 4x 10G NRZ 525 87.5 4x 10G RZ-DPSK 4x 10G RZ-DPSK 575 575 93.2 93.2 1x 10G RZ-DPSK 601 97.3 4x 40G DPSK 485 80.9 4x 40G AP RZ-DPSK 505 83.7 26x 100G PD-QPSK 401 66.9 References in the proceedings

conference & convention enabling the next generation of networks & services Ultimate reach 10 7 SNR (dB/0.1nm) 9.5 6.75 Q 2 factor (dB) 9 6.5 OSN Q 8.5 6.25 FEC limit 8 6 1560 1561 1562 1563 Wavelength (nm) � 4 x 10 Gb/s over 574 km, a pplying: � the RZ-DPSK format � ultra low-loss fibre � 3 rd order technology

conference & convention enabling the next generation of networks & services High efficiency (2 b/s/Hz) 11 18 10 16 NR (dB/0.1nm) 2 Factor (dB) 9 14 Q2 OSN FEC limit 8 12 7 10 1550 1555 1560 1565 Wavelength (nm) � 26 x 100 Gb/s demonstrated over 401 km � 100 Gb/s PDM-QPSK format + coherent receiver � 8 Tb/s (80 x 100 Gb/s) achievable (over shorter distance)

conference & convention enabling the next generation of networks & services Dense WDM (0.4 b/s/Hz) Tx λ λ 1 λ λ Tx λ λ λ 2 λ Filter . 24 x 10 Gb/s . . Mux Mu . . Rx Rx 1551 1552 1553 1554 1555 1556 1557 1558 Tx λ λ λ λ n-1 Pure Silica Tx λ λ n λ λ Core Fibre � Line without ROPA 6 x 40 Gb/s � Compare different configurations at 0.4 b/s/Hz 1551 1552 1553 1554 1555 1556 1557 1558

conference & convention enabling the next generation of networks & services Dense WDM (0.4 b/s/Hz) 13.0 40Gb/s NRZ-DPSK, 295 km 12.5 ctor (dB) 12.0 11.5 Q 2 facto 11.0 10Gb/s NRZ, 280 km 10.5 10.0 1552 1553 1554 1555 1556 1557 Wavelength (nm) � 40 Gb/s NRZ-DPSK ( ∆ f=100 GHz) performs better than 10 Gb/s NRZ ( ∆ f=25 GHz) !

conference & convention enabling the next generation of networks & services Upgrade of 10G system -30 -30 ROPA Tx λ λ 1 λ λ -35 -35 Tx λ λ 2 λ λ Filter Tx λ λ λ λ 3 Mux -40 -40 Tx λ λ 4 λ λ Rx Tx λ λ λ 5 λ -45 -45 Tx λ Tx λ λ 6 λ 6 λ λ λ λ Raman Raman Tx λ λ λ 7 λ -50 -50 source source 1276 nm 1276 nm -55 -55 1556 1556 1557 1557 1558 1558 1559 1559 1560 1560 Wavelength (nm) Wavelength (nm) • Starting with channels at 10 Gb/s • How do we upgrade to 40 Gb/s ? • Here margin is equalized for 10 and 40G channels • Power of 40 G channel is 2.5 dB higher than 10G channels

conference & convention enabling the next generation of networks & services Upgrade of 10G system 1.E-05 1.E-05 1.E-05 1.E-05 -28 -28 -28 ch #24: 40G alone 10G replaced by 40G -33 -33 -33 1.E-06 1.E-06 1.E-06 1.E-06 -38 -38 -38 only 10G channels -43 -43 -43 BER ER BER ER ER BER ER BER 1.E-07 1.E-07 1.E-07 1.E-07 1.E-07 1.E-07 -48 -48 -48 -53 -53 -53 1.E-08 1556 1557 1558 1559 1560 1556 1556 1557 1557 1558 1558 1559 1559 1560 1560 1.E-08 1.E-08 1.E-08 Wavelength (nm) Wavelength (nm) Wavelength (nm) only 10G channels, 2.5 dB more power on ch #24 1.E-09 1.E-09 1.E-09 1.E-09 1556.5 1557 1557.5 1558 1558.5 1559 1559.5 1560 1556.5 1557 1557.5 1558 1558.5 1559 1559.5 1560 1556.5 1557 1557.5 1558 1558.5 1559 1559.5 1560 1556.5 1557 1557.5 1558 1558.5 1559 1559.5 1560 Wavelength (nm) Wavelength (nm) Wavelength (nm) Wavelength (nm) • 10 Gb/s channels do not penalise 40G channel • 40 Gb/s channel does not penalise 10G channels

conference & convention enabling the next generation of networks & services Summary � UR systems meet submarine availability requirements � No active components in the cable => simple � Today: more than 1 Tb/s (100 x 10 Gb/s) � Capacity increase : � Capacity increase : � 3 Tb/s (40 Gb/s) or 8 Tb/s (100 Gb/s) � Better reach with higher bit-rate � Performance assessed in the laboratory � Improvements: � Fibre with reduced attenuation, larger effective area � Improved FEC capability (transponder) � Pumping scheme ?

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