Optical design and analysis of CWDM upstream TWDM PON for NG-PON2 |
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| Affiliation: | 1. Daegu-Gyeongbuk Research Center, Electronics and Telecommunications Research Institute, Daegu 711-880, Republic of Korea;2. School of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea;1. Istanbul Technical University, Istanbul, Turkey;2. Politecnico di Milano, Italy;3. University of California, Davis, USA;1. College of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;2. Centre for Optical and Electromagnetic Research (COER), Zhejiang University, Hangzhou 310058, China;1. Astek, London, United Kingdom;2. Microsoft Corporation, 1 Microsoft Way Redmond, WA, USA;3. Department of Computer Science, University of Miami, Coral Gables, FL, USA;4. Department of Industrial Engineering, University of Miami, Coral Gables, FL, USA |
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| Abstract: | For passively reach-extended next-generation passive optical networks (NG-PONs), we propose an asymmetric hybrid PON architecture and wavelength plan for using eight 2.5 Gbit/s coarse wavelength division multiplexing (CWDM) in the upstream direction and eight 10 Gbit/s dense wavelength division multiplexing (DWDM) in the downstream direction, called Cu-TWDM PON. The power budget feasibilities, the optical path losses, and the dispersion power penalties in the CWDM upstream wavelengths are precisely investigated in terms of related specifications required to enhance the network coverage to over 40 km with single-mode fibers (SMFs) based on ITU-T G.652.A and B and Corning’s SMF-28e, as the worst-case and the practical-case feasibilities, respectively. We also report on 10 Gbit/s and 2.5 Gbit/s transmission experiments up to 60 km for the downstream and upstream links. Based on the analyses and experimental results, we provide guidelines for the physical media dependent layer specification of Cu-TWDM PON for NG-PON applications. |
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