The proposed research project will integrate with the efforts of the PSG team and current research funding aiming towards a flexible network environment. The goal will be to investigate possible implementations to allow for an adaptive bandwidth configuration in existing legacy infrastructure, especially with the increasing demands for high capacity solutions in optical networks. As “Superchannels”, or all‐optical OFDM or Coherent WDM, are likely to be implemented for capacities beyond 1Tbit/s, a flexible network should be capable to adapt between the coexistent 10, 40, 100 and 1Tbit/s+ signals. In this project we will investigate possible solutions for this, using optical signal processing. By keeping the subcarrier baud rate <40Gbaud, impairments such as nonlinearities and polarisation mode dispersion should be minimised. Additionally, low symbol rates enable potentially energy efficient all‐optical signal processing by semiconductor optical amplifiers which possess very strong optical nonlinearities triggered by low input powers.
Description of facilities and research environment
PSG has a state‐of‐the‐art high speed telecom labs, with testbeds for Access, Metro and Long‐Haul (Core) communications, including equipment such as 12GS/s AWG, >10GS/s DPO, testsets ranging from 2.5 to 50Gbit/s, 75GHz sampling scopes, EDFAs, OSAs, DAC/ADC, FPGAs, WSS, recirculating loops, and more (https://www.tyndall.ie/node/1811).