Optical Detection Principles

Optical Communications

This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Optical Detection Principles”.

1. P-n photodiode is forward biased.
a) True
b) False

2. The depletion region must be ____________ to allow a large fraction of the incident light to be absorbed in the device(photodiode).
a) Thick
b) Thin
c) Long
d) Inactive

3. The process of excitation of an electron from valence band to conduction band leaves an empty hole in the valence band and is called as ____________
a) Detection
b) Absorption
c) Degeneration of an electron-hole pair
d) Regeneration of an electron-hole pair

4. __________________ always leads to the generation of a hole and an electron.
a) Repulsion
b) Dispersion
c) Absorption
d) Attenuation

5. The electron hole pairs generated in a photodiode are separated by the ____________
a) Magnetic field
b) Electric field
c) Static field
d) Depletion region

6. Electric field in the depletion region should be high.
a) True
b) False

7. The photocurrent of an optical detector should be __________
a) Less
b) More
c) Linear
d) Non-linear

8. How many types of optical detectors are available?
a) One
b) Four
c) Two
d) Three

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