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UGC-NET 2017: Optical Fibre Sources SpeedTest Quiz 18
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Question 1
An LED emitting at 1μm with a spectral width of 50nm is used in a Michelson interferometer. To obtain a sustained interference, the maximum optical path difference between the two arms of the interferometer is______.
Question 2
A thin P-type silicon sample is uniformly illuminated with light which generates excess carriers. The recombination rate is directly proportional to
Question 3
The responsivity of the PIN photodiode shown is 0.9 A/W. To obtain Vout of -1 V for an incident optical power of 1 mW, the value of R to be used is
Question 4
In optical fiber, light gets confined within the core through_____.
Question 5
Photovoltaic devices may be made from various semiconductors as optical materials for which the transmission coefficient (Tr) is shown in the figure given above as a function of photon wavelength. Which one of the following is the correct sequence of A, B and C pertaining to Ge, GaAs and Si, respectively?
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Dec 16ESE & GATE EC
