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Draw the construction of avalanche photodiode. State its working principle.
written 6.9 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.8 years ago by gravatar for Sharad Sharad • 160

Subject: Advance Communication System

Difficulty: Medium

Marks: 4 marks
advanced communication system
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written 3.8 years ago by gravatar for Sharad Sharad • 160

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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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