APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY Previous Years Question Paper & Answer
University : APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Course : B.Tech
Semester : SEMESTER 7
Subject : Opto Electronic Devices
Year : 2019
Term : MAY
Scheme : 2015 Full Time
Course Code : EC 469
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diagram
Explain working principle of circulator with neat sketch (5)
Discuss the construction and working principle of PIN photodiode (7)
An InGaAs APD has a quantum efficiency of 60% at 1.55um in the absence of (8)
multiplication. It is biased to operate with M=12.Calculate the photocurrent if the
incident optical power is 20nW.What is the responsivity when M=12?
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