d. What is the population inversion condition in semiconductor laser? How can you obtain population inversion condition? e. Draw and describe a typical structure of avalanche photodiode? Why do they make a p+ layer located at the encounter electrode?

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d. What is the population inversion condition in semiconductor laser? How can you obtain
population inversion condition?
e. Draw and describe a typical structure of avalanche photodiode? Why do they make a p+ layer
located at the encounter electrode?
Transcribed Image Text:d. What is the population inversion condition in semiconductor laser? How can you obtain population inversion condition? e. Draw and describe a typical structure of avalanche photodiode? Why do they make a p+ layer located at the encounter electrode?
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