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Four-Quadrant Position Sensing PD

PD00W4 is an InGaAs/InP photodiode segmented into four individual quadrants with small separation of only 30 µm. The topside illuminated four-quadrant photodiode features a very large detecting area with 3 mm diameter. The photodiode structure is optimized for position sensing, beam alignment / profiling and optical tracking applications.

The photodiode offers a very low dark current and an excellent responsivity in the wavelength region from 980 nm to 1620 nm. The anode pad metallization is optimized for wire-bonding. The common cathode metallization on the chip backside consists of solderable metal.


  • Large active area of 3 mm diameter
  • Very small quadrant separation: 30 um
  • Very low dark current
  • High responsivity: 1.1 A/W
  • Very low dark current
  • Solderable common cathode metallization