25-Gb/s 1310-nm Optical Receiver Based on a Sub-5-V Waveguide-Coupled Germanium Avalanche Photodiode

  title={25-Gb/s 1310-nm Optical Receiver Based on a Sub-5-V Waveguide-Coupled Germanium Avalanche Photodiode},
  author={Hong Tao Chen and Jochem Verbist and Peter Verheyen and Peter De Heyn and Guy Lepage and Jeroen de Coster and Philippe Absil and Bart Moeneclaey and Xin Yin and Johan Bauwelinck and Joris Van Campenhout and Gunther Roelkens},
  journal={IEEE Photonics Journal},
We demonstrate low-voltage waveguide-coupled germanium avalanche photodetectors (APDs) with a (wafer-scale mean) gain×bandwidth product of 140 GHz at -5 V by utilizing a 185-nm-thick Ge layer. An optical receiver based on such an APD operating up to 25 Gb/s is demonstrated. 
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