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Side Illuminated Monitor Photodiode

Side illuminated monitor photodiode chip offering a wide detection window and a small form factor. The photodiode structure is optimized for monitoring the optical output emitted from the backside of edge emitting FP and DFB lasers used in single-mode data- and telecom applications as well as EDFA pump lasers. The monitor diode offers excellent responsivity in the wavelength region from 1260 to 1620 nm.

The incoming laser light is refracted by the curved side facet onto the active area. Thanks to this unique side facet, a bulky and expensive “wrap-around” submount is not required. The photodiode die is manufactured with topside wire-bondable pads for both anode and cathode.


  • Side illuminated InGaAs monitor photodiode
  • Unique curved side facet
  • Low bias voltage: 1.5 V
  • Small form factor

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