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The Photon Counting group are involved with:

• InGaAs/InP Infra–Red Single–Photon Avalanche Diodes
  Planar-geometry InGaAs/InP single–photon avalanche diode detectors specifically designed for single–photon detection at a wavelength of 1550nm.
  
  
• Optical Fibre Based Quantum Key Distribution at GigaHertz Clock Rates
  High clock rate optical fibre based quantum key distribution system.
  
  
• Time–of–Flight Ranging
  Remote imaging based on photon time–of–flight.
  
  
• Quantum Dot Microresonators
  Single–photon sources for the next generation of optical systems.
  
  
• Single–Photon Sources in Quantum Key Distribution
  Demonstrations of quantum key distribution using single–photon sources.
  
  
• Parafluo
  Developing a new optoelectronic system for sFLIM of fast dynamical processes in cells and tissues
  
  
• MiSPIA
  Development of beyond state–of–the–art photonics technology for array imagers of smart–pixels able to detect single–photons.
  
  
• UK Silicon Photonics
  Development of advanced silicon and silicon–based photonic techologies.