Device Types MCQ’s

This set of Optical Communication Multiple Choice Questions & Answers (MCQs) focuses on “Device Types”.

1. The first generation systems of optical fiber communication have wavelengths between ___________
a) 0.2 and 0.3 μm
b) 0.4 and 0.6 μm
c) 0.8 and 0.9 μm
d) 0.1 and 0.2 μm

2. The quantum efficiency of an optical detector should be high.
a) True
b) False

3. ____________ converts the received optical signal into an electrical signal.
a) Detector
b) Attenuator
c) Laser
d) LED

4. Which of the following does not explain the requirements of an optical detector?
a) High quantum efficiency
b) Low bias voltages
c) Small size
d) Low fidelity

5. The ___________ process takes place in both extrinsic and intrinsic semiconductors.
a) Avalanche multiplication
b) External photoemission
c) Internal photoemission
d) Dispersion

6. Silicon photodiodes provide high shunt conductance.
a) True
b) False

7. Silicon has indirect band gap energy of __________________
a) 1.2 eV
b) 2 eV
c) 1.14 eV
d) 1.9 eV

8. How many device types are available for optical detection and radiation?
a) One
b) Two
c) Three
d) Four

9. ____________ are widely used in first generation systems of optical fiber communication.
a) p-n diodes
b) 4-alloys
c) 3-alloys
d) Silicon photodiodes

10. Which of the following detector is fabricated from semiconductor alloys?
a) Photoconductive detector
b) p-i-n detector
c) Photodiodes
d) Photoemission detectors

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