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?