Tunable DWDM PON at WDM PON Forum Workshop
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This document summarizes a presentation on tunable dense wavelength division multiplexing passive optical network (DWDM PON) technologies. It discusses the challenges of current passive WDM networks and how tunable DWDM PON can address these by allowing dynamic wavelength tuning. It describes how tunable DWDM PON uses a centralized wavelength control system to tune low-cost tunable transceivers at the optical network units to specific wavelengths allocated by the optical line terminal, enabling high-capacity transparent services over a large number of wavelengths to multiple users.
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Tunable DWDM PON at WDM PON Forum Workshop
- 1. Stephan Neidlinger, WDM PON Forum Workshop Nice, France, June 23, 2014 Tunable DWDM PON
- 2. © 2014 ADVA Optical Networking. All rights reserved. Confidential.22 Today’s CWDM Backhaul ONU 1 ONU 2 ONU N POP Fastweb OLT or PoP Remote Node • Shipping in volumes • Dual fiber working CWDM design with up to 16 channels supported • Outdoor deployment supported (ext. temp range: -25°C to +70°C) • Pluggable modules used having fixed wavelengths CPE SFP+ /XFP RX TX CPE SFP+ /XFP RX TX Feeder Fiber Distribution Fiber CPE SFP+ /XFP RX TX SFP+/XFP TX RX SFP+/XFP TX RX
- 3. © 2014 ADVA Optical Networking. All rights reserved. Confidential.33 Passive WDM Colored CWDM/DWDM Colored CWDM/DWDM Challenges of Passive Optical Multiplexing Passive optical multiplexing is the most cost effective WDM solution, but there are some challenges involved • No clear demarcation between client and transport equipment • Client equipment has no integration into a transport-NMS • Root cause analysis is difficult as there is only limited information available at the central node about the far end
- 4. © 2014 ADVA Optical Networking. All rights reserved. Confidential.44 Moving to higher Service Channel Counts • Increasing wavelength channel throughput • Using multiplexing transponders (Time Division Multiplexing) • Ideal for GbE services • Increasing number of wavelengthes • Dense wavelength division multiplexing (DWDM) • Ideal for higher bit rate services
- 5. © 2014 ADVA Optical Networking. All rights reserved. Confidential.55 Increasing Wavelength Channel Throughput TDM/CWDM Backhaul POP Fastweb CO or PoP Remote Node • Reuse of (deployed) CWDM infrastructure • Multiplexing transponders in CO/PoP and remote node or at customer premises • Additional demarcation function Feeder Fiber e. g. Nx GbE
- 6. © 2014 ADVA Optical Networking. All rights reserved. Confidential.66 • Number of wavelength channels 40/80 (or more) • Key requirements/challanges • OLT: PIC-based multi channel DWDM transceiver modules • Outdoor capable DWDM filters (-25°C to +70°C) • ONU: Tunable laser components • System: Wavelength tuning mechanism Increasing Number of Wavelengthes DWDM PON
- 7. © 2014 ADVA Optical Networking. All rights reserved. Confidential.77 Tunable DWDM PON System Architecture 40/80 channel DWDMTb/s Aggregation OLT Central wavelength control PIC-based Nx 1..10G DWDM transceiver module Low-cost tunable 1..10G SFP/SFF transceiverITU-T G.698.3 wavelength grid Transparent service delivery to large number of users
- 8. © 2014 ADVA Optical Networking. All rights reserved. Confidential.88 Tunable DWDM PON Wavelength tuning mechanism ONU#n SFPOLT RN AWG TX/RX Array PIC … Tunable LD Receiver l-Control C/L Tuning SoC,ClientI/Fs,etc. Wavelength Control Loop L2 Access Switch Auto-tuning of ONU, controlled by OLT
- 9. © 2014 ADVA Optical Networking. All rights reserved. Confidential.99 C/DWDM PON Summary C/DWDM PON supports today’s needs and delivers a future-proof upgrade path • Simple, robust • Outdoor capable • Shipping in volumes CWDM PON • Increased service channel count • Reuse of existing CWDM infrastructure TDM/CWDM • Highest channel count • Transparent service delivery DWDM PON
- 10. info@advaoptical.com Thank You IMPORTANT NOTICE The content of this presentation is strictly confidential. ADVA Optical Networking is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA Optical Networking shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA Optical Networking.