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Describe working and principle of avalanche photodiode with neat sketch. OR Draw the construction of avalanche photodiode. State its working principle.
written 6.9 years ago by gravatar for teamques10 teamques10 ★ 70k •   modified 5.7 years ago

OR

How amplification takes place in Avalanche photodiode (APD) used as optical detectors ?
advanced communication system
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written 6.9 years ago by gravatar for teamques10 teamques10 ★ 70k

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Working Principle:

  • The RAPD is operated in the fully depleted mode. Photons enter the device through the p+ region and are mostly absorbed by the high resistivity intrinsic p type layer where electron hole pairs are created.
  • The relatively weak electric field in this region forces or separates the …

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