The Optical Networking and Communication
Conference & Exhibition

San Diego Convention Center,
San Diego, California, USA

Ultimate Capacity Limits for TDM/TDMA PON

Sunday, March 11, 2018
12:30 PM - 3:30 PM

Event type: Workshop

Room number: 6D


Derek Nesset, Huawei, UK; Naoki Suzuki, Mitsubishi Electric, Japan; Lilin Yi, Shanghai Jiao Ton Univ., China


This workshop will pose the question as to whether there is an ultimate limit to conventional TDM/TDMA PON capacity. Already, the ITU-T has moved to the wavelength domain with the multi-channel NG-PON2 system and the IEEE is developing specifications for a 100G EPON system using four wavelengths at 25Gb/s. However, multiple wavelengths add some technical and operational complexity to the PON system and the question naturally arises as to what could be achieved with a single wavelength channel per direction?

This workshop will address this tough question from a number of perspectives to drive a debate as to the real limiting factors. Expert speakers will be invited to deliver concise but opinionated presentations on a sub-set of the following issues:

  • What transmission techniques could be used to compensate for dispersion, device bandwidth limitations… etc?

  • Can deployed ODNs with up to ~30dB loss be re-used?

  • How far can the launch power be increased?

  • Will optical amplifiers be necessary? Can they be practical and low-cost?

  • What are the limits for receiver sensitivity? What about the burst mode issues?

  • What receiver types could be used e.g. coherent or direct detection?

  • When does it just become much more cost efficient to add wavelength channels?

  • Are new PON protocols needed? For example to limit the power burden of continuous downstream frame processing or to support new services?

  • How much more can be gained from electronics e.g. DSP, FEC...?

  • How can low cost optical devices be realized for high-bandwidth PON implementation?

  • What optical modules could be used? Is power consumption a killer? What about TO-cans?

  • Is there a role for silicon photonics?

  • Does co-existence with legacy PON limit what ultimate capacity could be achieved?

  • What are the applications driving to higher capacity?

  • Do network operators see advantages for multiple-channels or would single channel be just as good or, even, preferred?


Erik Agrell, Chalmers University, Sweden
Johan Bauwelinck, IMEC, Belgium
Vincent Houtsma, Nokia, USA
Dominiç Lavery, University College London, UK
Xiang Liu, Huawei, USA
Chao Lu, PolyU, Kowloon, Hong Kong
Seb Savory, Cambridge University, UK
Katsuhiro Shimizu, Mitsubishi Electric, Japan
Daisuke Umeda, Sumitomo Electric Industries, Japan
Naoto Yoshimoto, Chitose Institute of Science and Technology, Japan

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