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4 x 28 Gb/s Photodiode Array

4 channel 28 Gb/s photodiode array equipped with tapered coplanar transmission lines in a G-S-G layout. The large optical apertures and photodiode pitch of 250 µm make the device ideal for coupling to fiber ribbon cables. The chip layout is optimized to provide maximum distances between the electrical contact pads while ensuring high crosstalk attenuation between adjacent channels.
The top illuminated p-i-n photodiode structures are optimized for long-wavelength, high-throughput parallel optical interconnects, microwave photonic and RF over fiber links as well as test and measurement applications. The photodiode array offers excellent responsivity and high speed of response in the wavelength region from 1260 to 1620 nm.


  • Top illuminated 4 x 28 Gb/s InGaAs photodiode array
  • High crosstalk attenuation of 25 dB between adjacent channels
  • G-S-G pad configuration for each channel
  • Photodiode pitch: 250 µm
  • High responsivity: 0.8 A/W
  • Low capacitance: <100 fF

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