Compound semiconductors

What are InP (indium phosphide)-based compound semiconductors mainly used for?

  1. ALasers and photodetectors for optical fiber communication
  2. BPolycrystalline substrates for solar cells
  3. CDRAM capacitors
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Answer: A. Lasers and photodetectors for optical fiber communication

Compound semiconductors such as InGaAsP grown on InP substrates can emit and detect light in the 1.3 µm and 1.55 µm bands, where optical fiber loss is low, so they are used in semiconductor lasers and photodiodes for optical communication.

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