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Which one of the following can be used as a photo detector in Fiber Optic Communication?

Which one of the following can be used as a photo detector in Fiber Optic Communication? Correct Answer PIN diode

  • PIN photodiodes are used in fibre optic network cards and switches.
  • They are designed to detect photons and are used in optical detection.
  • Reverse current flows through the photodiode when it is sensing light. 
  • When photons excite carriers in a reverse-biased p-n junction, a very small current proportional to the light intensity starts to flow.
  • The intensity depends on the wavelength of the light.
  • Photodiodes convert incident light into electric energy, so they are used as optical detectors.

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