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Scalable 4 x 25 Gb/s GaAs PD Array


Scalable 4 x 25 Gb/s short-wavelength GaAs photodiode array. The scalable 1 x 4 array is designed such that the photodiode pitch of 250 µm is maintained across the border of the 1 x 4 basic cell. The photodiode pitch of 250 µm is suitable for coupling to fiber ribbon cables. The basic cell can be repeated n times to provide scalable arrays of 4, 8, 12 or more individual photodiode channels.

The arrays are optimized for short reach 850 nm VCSEL based parallel optical interconnects with a speed of up to 25 Gb/s per channel. The top illuminated p-i-n photodiode structure offers an excellent responsivity and high speed of response in the wavelength region from 830 to 860 nm.


  • Scalable 4 x 25 Gb/s GaAs photodiode array
  • High crosstalk attenuation: 30dB
  • Photodiode pitch: 250 µm
  • High responsivity: 0.53 A/W
  • Low capacitance: 100 fF
  • Low dark current: 0.1 nA

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