Outline London CBF and Brussels Photonic Exchange Time and - PDF document

13/11/14 ¡ Sharing of Spectrum and Alien Waves in and around SURFnet 3RD TERENA ARCHITECT WORKSHOP Rob Smets – Architect Transport and Light Systems Outline • London CBF and Brussels Photonic Exchange • Time and Frequency Transfer in SURFnet’s network • 100G Alien waves for customers • Multi-domain alien-wave demand planning rules • Infinera waves on a Ciena light system • Guy Roberts from GEANT Association (Some of these slides have been presented at CEF2014 Prague) 1 ¡

13/11/14 ¡ London CBF / Brussels Photonic Exchange Amsterdam – London CBF • Joint Collaboration between NORDUnet and SURFnet • Collaboration: NORDUnet leases the fiber, SURFnet installs and operates the light system. We start with two 100G waves. • CBF between ASD001A – ASD002A – LDN001A • For SURFnet puts total number of CBFs to four (Geneva, Hamburg, London, Aachen) • Puts total number of foreign PoPs to six. • Driven by desire to connect to services in London directly • Installation took place in September 2013 during ECOC 2013 • Has been in service since December 2013. Expected doubling of 100G services in one year. 2 ¡

13/11/14 ¡ Amsterdam – London CBF in more detail London (HEX) Wherstead Whickford Leiston 6500 WL3 78km 79km 47km Alien 17dB/18.2dB 17.9dB/18.2dB 10.3dB/13.5dB 215km 40.6dB/20.3 dB IL RAMAN (RX+TX) = 5.4dB Total IL = 46dB Gain RAMAN: 25.7dB (Ppump=2.88W , Pseed=18mW) 10km + 10dB 53km 6500 12.8dB/14.8dB WL3 2.4dB/13.5dB Alien 6500 WL3 Zandvoort Amsterdam 1 Amsterdam 2 Photonic Exchange in Brussels Hamburg Amsterdam PoP PoP London PoP NORDUnet PoP PoP Brussels SURFnet Geneva PoP Paris PoP 3 ¡

13/11/14 ¡ Why and how? Use cases: • Restoration • Redundancy • For both customer and non-customer facing services Requirements: • Support >10Gbps • 50GHz ITU grid / 88 channels (all DWDM channels in the C-band) • Switch from and to any direction • Local add/drop • All waves should be presented in a single fiber Concept Datacenter SURFnet Local Add/Drop To ASD WSS To GEN WSS MLA MLA WSS-DIA SURFnet SURFnet MLA OSI_2 OSI_1 BMD2 CMD44 Virtual BMD2 Ca. 10 Km NDSF + patching: 7dB (max) EDFA & CMD44s (Derived Adj.) MLA WSS-DIA WSS To LON To HB WSS MLA MLA NORDUnet Local Add/Drop NORDUnet OSI_1 OSI_2 Datacenter NORDUnet Line fiber (0 km) + padding 4 ¡

13/11/14 ¡ Restoration using OPS switches London Amsterdam 2 Amsterdam 1 ROADM 6500 TOADM 6500 TOADM OPS ASD-LON link (50 GHz) Ch. 28 Gr. 3 add/drop add/ OCLD Ch. 68 OCLD drop OTS OTS OTS OTS OPS Ch. 68 OPS Gr. 7 add/drop OCLD WSS Gr. 3 Gr. 3 Ch. 28 Ch. 28 OPS Ch. 68 add/drop OCLD ROADM WSS 6500 (50GHz) OTS BRU-ASD link To/from Hamburg BRU001A_CPL1P Ch. 28 add/ OTS OTS To/from Ch. 68 LON-BRU link drop Geneva DIA OTS OTS DIA OTS ROADM ROADM 6500/CPL (50GHz) (50GHz) Brussels - NORDUnet Brussels - SURFnet Time and Frequency Transfer 5 ¡

13/11/14 ¡ Time and Frequency Transfer in SURFnet • Objective: Allow clocks to synchronize their time with an accuracy better than 500ps • Two approaches that allow the far end to be compensated for the offset to the middle of a loop: • Maintain unidirectional traffic and calibrate the system to compensate for the asymmetry due to different length of each fiber in the fiber pair • Implement bi-directional transmission and amplification on a single fiber and only calibrate the time difference occurring in the amplifier and in fiber due to dispersion. • SURFnet aims to make adjustments to the network that allows institutions to deploy White Rabbit systems beyond 10km. Semiconductor Optical Amplifiers 1470nm In: 1470nm In: 1490nm Out: 1490nm Out: 1470nm 1490nm LEDN001A_BIDIRAMP_01 (BDOA100B901) 1490nm In: 1470nm In: 1490nm Out: 1490nm Out: 1470nm 1470nm LEDN001A_BIDIRAMP_02 (BDOA100B902) 6 ¡

13/11/14 ¡ Experimental setup over dark fiber • In 2013 we have started with the following set-up: VSL-Delft (Dutch Metrology Institute) LEDN001A Campus TU-Delft / DT001B 1dB -1.0dBm -17.3dBm 1.7dBm M 5km G.652 35.5km G.655 3.4dB 3.4dB 9.5dB S -24.0dBm -7.7dBm -26.7dBm 19dB 135km, mixed G.655/G.652 fiber 81km G.655 Δ T 19.6dB 1dB -1.0dBm M G.652 0.5km 14km 0.8dB 0.8dB G.652 3.1dB S -24.0dBm 1.4dB ASD002A (TC2) ASD001A (SARA) NIKHEF-Amsterdam (National Institute for Subatomic Physics) Findings: • BiDi amplifiers are placed asymmetrical in the link. • Link engineering becomes significantly more complex in the absence of sim-tooling • Gain of SOAs difficult to control by changing the electrical pump current • Amplifiers produce about 19dB of gain on 1470nm and 1490nm • Compatibility with fiber infrastructure is good. • There are two types of optical budget: too much and too little! • Initial tests showed a positive budget of 0.1dB on worst link and wavelength combination • After cleaning a positive budget of 2.0 to 3.5 dB exists • Total budget equals: 20dB + P TX – S RX = 52 – 57 dB depending on transceiver combinations. • Total losses equal: 17.3dB between Delft and Leiden and 26.7dB between Amsterdam and Leiden sites. • Both slaves lock • Round trip delay of 668,981,165ps corresponds to 136km of fiber (272km round trip). • Frequency offset of -0.3*10 -13 Hz/Hz with a spread of 6*10 -13 Hz/Hz over several hours. • 12 digit accuracy of the frequency already present. • On-going work to calibrate the small difference between 1490nm and 1470nm waves. • Measurements are ongoing. We expect to achieve time accuracy around 500ps. 7 ¡

13/11/14 ¡ Press release 100G Alien waves for customers 8 ¡

13/11/14 ¡ Extend DWDM waves into the customer’s domain requires a New Demarcation Box: Optical Gate Router Router MGMT MGMT MGMT DWDM OG OG TRX TRX TRX TRX Institution A Institution B SURFnet Virtualization of the management function MGMT Router Router DWDM OG OG TRX TRX TRX TRX Institution A Institution B SURFnet Challenges • Optical plane: • DWDM signals are transported over an infrastructure that is intended for un- engineered links on campus • A proper CFP! • Cross domain management: • Fault Management • Configuration Management • Accounting • Provisioning • Security • Controlled and accessible by both SURFnet and institutions Optical Gating and Management Information Exchange Functionality may be required to: • Isolate and protect the DWDM network • Monitoring • Measure frequency • Test photonic path between two gateways • Exchange of management information and instructions (may be virtualized in a datacenter) 9 ¡

13/11/14 ¡ Two Scenario’s • CPE equipment (router or switch) of both customers is the same: • Vendor has DWDM blade in portfolio that interoperates with light system • Vendor has DWDM blade in portfolio that does not interoperate with light system • Vendor has no DWDM blade in portfolio but does support a CFP slot. • CPE equipment (router or switch) of both customers is different: • Both CPEs have a CFP slot • At least one of the CPEs does not have a CFP slot -> no solution Can we find such a CFP that: • Interoperates with SURFnet’s DWDM equipment • Compatible with Topology of SURFnet7 and SURFnet8 • Is affordable! (<$10,000) ACACIA 100G Coherent CFP What if you: • optimize power of transmission impairment compensating ASICs; • start using 28nm/20nm semiconductor process; • start using Silicon Photonics Integrated Circuits and InP chips; • pay extreme detail to power consumption and heat management? Source: Acacia Inc. Source: Flickr <24-26W • <7.5W for DSP DWDM single lambda solution • • <7.5W for ADC/DAC/SERDES • 50GHz C-band grid • Ca. 5W for PIC • 25ps PMD tolerance & 40 ns/nm CD tolerance • < 10W for misc. funct. • Compatible with >1000km network solutions • 24W for ZR range • < 15dB OSNR for up to 2000km • Path to smaller form factors like CFP2 • SD-FEC, HD-FEC • Supported by hosts • 10 ¡

13/11/14 ¡ Multi-domain alien-wave planning Spectrum Sharing on Cross Border Fibers Three important cross-border fibers • Amsterdam – London Photonic Exchange in Brussels! • Amsterdam – Geneva • Amsterdam – Hamburg Photonic Exchanges in Hamburg/Geneva ? 11 ¡