STUPIDSID
1 (a)
List the advantages, disadvantages and applications of optical fibre communication system.
8 M
1 (b)
A step index multimode fibre with a NA of 0.2 supports approximately 1000 modes at an 850 nm wavelength. What is the diameter of its core? How many modes does the fibre support at 1320 nm and at 1550 nm?
9 M
1 (c)
Define acceptance angle and critical angle.
3 M
2 (a)
Explain macro bending and micro bending losses with a neat diagram.
10 M
2 (b)
Explain the signal distortion in fibres.
6 M
2 (c)
Write a note on: i) Attenuation, ii) Absorption.
4 M
3 (a)
List the desirable characteristics of the LED and LASER diode as optical source.
8 M
3 (b)
Explain P-I-N photo-diode with a neat diagram.
8 M
3 (c)
Photons of energy 1.53×-19 J are incident on a photo-diode which has responsibility of 0.65 A/W. If the optical power level is 10 μW, find the photo current generated.
4 M
4 (a)
What is splicing? Explain the fusion splicing with a neat diagram.
8 M
4 (b)
List the requirements of a good connector.
6 M
4 (c)
Explain the fundamental types of misalignments between fibres.
6 M
5 (a)
With a neat block diagram the digital signal transmission through an optical data link.
12 M
5 (b)
Give the classification of front end amplifier used in optical fibre communication system. Explain any one of them.
8 M
6 (a)
Explain the optical power loss model with a neat diagram.
10 M
6 (b)
Clearly explain the analog link with the major noise contributions at each stage.
10 M
7 (a)
What is WDM? Briefly explain the advantages of WDM.
4 M
7 (b)
Explain the polarization independent isolator with a neat diagram.
8 M
7 (c)
Write a note on MEMS technology.
8 M
8 (a)
What are salient features of semiconductor optical amplifiers?
6 M
8 (b)
Write note on:
i) SONET/SDH rings
ii) High speed light waveguide
i) SONET/SDH rings
ii) High speed light waveguide
14 M
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