Workpackage leader: Irshaad Fatadin, NPL

Other participants: CMI, PTB, Agilent, EXFO

• Develop traceable characterization of the vector frequency response of a single photodiode over the range of approximately 1 GHz to >100 GHz complete with uncertainty budget.
• Develop traceable techniques to characterise differential photodiode pairs that form the core of a coherent receiver system. The common-mode and differential-mode vector frequency responses and uncertainty budgets are required over the range
  <1 GHz to > 50 GHz, complete with uncertainty budgets.
• Develop measurement and analysis techniques for high spectral-efficiency modulation strategies such as QAM, traceable to electrical-waveform standard primary standards, to underpin the optical test instrumentation and commercial portable secondary reference standards required for terabit coherent optical transport. The technique must provide uncertainties for key parametric measures, such as Error-Vector-Magnitude (EVM).

The research within this EURAMET joint research project receives funding from the European Community's Seventh Framework Programme, ERA-NET Plus, under Grant Agreement No. 217257.