WDM-PON as efficient Campus and Metro Infrastructure TNC2013, Maastricht, June 2013 Dr. Klaus Grobe, Dr. Jörg-Peter Elbers, ADVA Optical Networking SE

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 22 Content Passive WDM WDM-PON

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 33 Passive WDM

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 44 Filter Application (Switch) Passive Transport  Simple setup  Low latency  Low power and space consumption  Few active components – good MTBF  No performance monitoring  No optical surveillance, no protection  Amplification difficult, at best  Limited scalability, no TDM, max. 80  10G  Amplification, distances up to 2500 km  TDM option for higher aggregate bandwidth  Scalable up to 96 100G  Protection switching  Optical in-band management  Optical performance monitoring  Embedded encryption option for all signals  Higher power and space consumption WDM Transport Options for optical Networking Fixed-wavelength WDM Pluggables Application (Switch) Transport System

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 55 Logistics 40 different transceiver part numbers Spare-parts pool required Setup Correlate near-end plug and WDM port to far-end plug and WDM port Trust power levels or use additional measurement equipment Supervision No optical-layer monitoring, external OSA required No visualization of in-service wavelengths, external OSA required Installing a passive Link the old Way CapEx Index 1.0 XFP #1 #2 #40 WDM 40-Channel WDM Filter Shelf WDM … XFP …

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 66  Performance monitoring and spectrum analyzer  Amplification for extended distances  Scalable up to 96 wavelengths  Protection switching  Simple setup  Low latency  Low power and space consumption  Few active components Take the best of both worlds Options for optical networking Passive TransportWDM Transport

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 77 Optojack TM passive Link Logistics Single universal tunable plug for 96 ITU-T WDM channels Setup Put plug to router slot Connect plug with any free WDM port, choose same port at remote location Supervision In-service wavelengths Power levels in both directions, power-level alarm thresholds Plug data (voltage, temperature, laser bias current, …) 1U Tracer Shelf CapEx Index 1.25 OJ TXFP #1 #2 #96 WDM 96-Channel WDM Filter Shelf WDM … TracerTracer 960G Capacity OJ TXFP …

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 88 Optojack TM XFP MSA-compatible XFP Remote control and tuning of all transceivers – host needn’t support tuning Access transceiver data via separate communication channel Remote-transceiver performance and wavelength-allocation monitoring Every other transceiver or test points can access communication channel 50 GHz, up to 96 channels Rx CTRL µC Tx From and to Host OJ out OJ in 1k 10k 100k 1M 10M 10G Er + Lifetime FM Carriers Transport Protocol RF Spectrum Common Channel #0 Individual Channels #1...#96 #0 #1 #96 f [Hz]

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 99 Optojack TM Tracer Tracer allows bi-directional communication with Optojack pluggables Broadcast messaging for in-service and out-of-service wavelengths Automatic wavelength management (without host/client involvement) Remote-loop switching Shows WDM wavelength presence and RF spectrum analysis RxTx µC OJ outOJ in Rx Link Side Client Side Broadcast Messaging for Out-of-Service Channels Detect RF, read OJ Protocol

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 10 Plug powered and wired Plug autonomously starts wavelength and RF sweep Tracer detects new RF tone Tracer sends set-wavelength command to plug (via RF) Plug goes in service Wavelength tuning does not require the far-end New plugs automatically get wavelength-assigned Automatic Tuning and Spectrum Analysis RF Feedback Loop OJ TXFP … Tracer Graphical User I/F WDM

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 11 Next Step Next step: adopt concept to the upcoming Tunable SFP+ Allows transparent passive optical networking with bit rates ~10G Efficient solution for business access, backhaul, fronthaul

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 12 WDM-PON

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 13 Towards WDM-PON Allow point-to-multipoint distribution Autonomous tuning of remote transceivers Without host intervention Via local transceivers Support various bit rates and sufficient reach Integrate aggregation (AGS) in OLT PoP Core Network AGS CampusTracer WDM RN OLT WDM T-LD...

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 14 Evolution to low-cost Laser Diodes Tone: Pilot-Tone Generator, PD: Photo Diode, TIA: Transimpedance Amplifier, ECC: Embedded Communications Channel RN CAWG OLT Array RX incl. AWG Array TX incl. AWG C/L (Tone)Tracer ECC Tone L-Band 50/100 GHz C-Band ~50/100 GHz ONU (CPE) T-LD PD TIA Tone Tune Uses low-cost tunable LDs (not yet available) Single-Fiber Working via Cyclic AWG (CAWG) C-Band upstream (e.g., 100 GHz) L-Band downstream (then, 97.5 GHz)

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 15 Cyclic AWG (G.698.3) 1400 Attenuation [dB/km] Wavelength [nm] 1600 E-BandS-BandC-Band L-Band U-Band G C-Band G S + -Band G L-Band G S - -Band G U-Band G E-Band Cyclic AWGs allow routing of several wavelengths to common ports Does not increase insertion loss Can be made athermal (outdoor installation) ITU grid (e.g., 100 GHz) only in one cyclic filter order

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 16 N:M AWGs Rows …... translate into …... columns m Waveguides with constant Length (Phase) Difference 1a 3a 2a 4a 1b 3b 2b 4b 1c 3c 2c 4c 1d 3d 2d 4d 1a 3c 2d 4b 1b 3d 2a 4c 1c 3a 2b 4d 1d 3b 2c 4a FPR Free Propagation Region Phase Shifter

© 2013 ADVA Optical Networking. All rights reserved. Confidential. 17 Operational Aspects, enabled by CAWG RN AWG OLT U-Band OTDR … TRX Array incl. AWG L/U ONU TRX Passive LT (U-Band Reflector) 2:N AWG … TRX Array 1 TRX Array 2 OLT RN ONU TRX Non-service-affecting OTDR monitoring with unambiguous results Low-cost passive Line Termination (LT) Cyclic 2:N AWGs allow low-cost feeder-fiber protection No added insertion loss, protection by tuning (see previous slide)

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