VTU Optical Fiber Communication - December 2014 Exam Question Paper

VTU Electronics and Communication Engineering (Semester 7)
Optical Fiber Communication
December 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) With neat sketches of RI profile and wave propagation in optical fibre communication, compare different types of fibers?

8 M

1 (b) With neat sketches, explain the characteristics and operating ranges of the four key optical fibre link components.

7 M

1 (c) Explain MCVD process for manufacturing low loss GI Fibre.

5 M

2 (a) Explain different types of attenuation in optical fibre.

6 M

2 (b) Classify and explain chromatic dispersion within a single mode fibre.

8 M

2 (c) Consider a 10 km long multi mode in which n₁=1.483 and Δ=0.01. Calculate n₂ and pulse broadening after travelling 10 km.

6 M

3 (a) Explain with schematic an LED which is highly directional and sketches the spectral emission pattern of an LED.

7 M

3 (b) Compare operating parameters of G_e S_i and InGaAs of PIN and APD.

7 M

3 (c) With neat sketch, explain RAPD structure and the electrical fields.

6 M

4 (a) Explain different types of fibre splicing methods used for optical fibres. Explain electric are fusion splicing.

8 M

4 (b) Explain expanded beam fibre optic connector.

5 M

4 (c) List several possible lensing scheme and explain briefly non imaging lensing scheme.

7 M

5 (a) Draw a signal path through a digital link with relevant components and optical/electrical waveforms at every stage.

6 M

5 (b) What are the noise source and disturbances that arise in optical pulse detection mechanism? Explain them in detail.

6 M

5 (c) Draw and explain eye pattern and mark the fundamental measurement parameters.

8 M

6 (a) What is rise time budget? Explain its significance. Derive an expression for the system rise time budget in terms of transmitter, fiber and receiver rise time.

8 M

6 (b) Explain sub-carrier multiplexing, with neat block diagram.

5 M

6 (c) Derive an expression for the CNR of an analog communication system under limiting condition of noise source involved.

7 M

7 (a) Explain WDM networks containing various types of optical amplifiers.

7 M

7 (b) Write a note on MZI multiplexer.

7 M

7 (c) Explain dielectric thin film filter and its applications.

6 M

8 (a) With neat energy level diagram, explain EDFA.

10 M

8 (b) Write a note on:
Basic format of
STS-N-SONET and
STM-N-SDH frame
ii) High speed light wave links.

10 M

More question papers from Optical Fiber Communication

SPONSORED ADVERTISEMENTS