2007 Mahatma Gandhi University M.Sc Electronic Science Fiber Optics and their Applications Question paper for exam preparation. Question paper for 2007 Mahatma Gandhi University M.Sc Electronic Science Fiber Optics and their Applications Question paper, Exam Question papers 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2012 university in india question papers. SiteMap
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2007 Mahatma Gandhi University M.Sc Electronic Science Fiber Optics and their Applications Question paper

University Question Papers
2007 Mahatma Gandhi University M.Sc Electronic Science Fiber Optics and their Applications Question paper
M.G. UNIVERSITY

M.Sc. (ELECTRONICS) DEGREE EXAMINATION, JANUARY 2007

Third semester

FIBER OPTICS AND THEIR APPLICATIONS

Time : Three Hours Maximum : 75 Marks

Part A

Answer any six questions.

1. Mention three advantages of optical fibre as waveguide over conventional metallic waveguide.
2. What is meant by Vnumber of fiber?
3. What are intra modal dispersion and intermodal dispersion?
4. What is the effect of mode coupling on pulse distortion?
5. Define internal quantum efficiency of LED.
6. What are submerged systems?
7. What are the military applications of optical fibers?
8. Give the schematic of single-ended coaxial network that uses power splitters and combiners in star configuration.
9. Define optical bandwidth of amplifier.
(6 X 2 = 12 marks)

Part B

Answer any three questions.

10. Give the different types of fiber along with the diagrams for refractive index profile and light ray propagation.
11. Give an account on polarization mode dipersion and refractive index profile dispersion.
12. Draw the schematic structure of hetero structure laser diode along with the importance of every layer.
13. What are local access network? Explain.
14. Explain WDM technique with suitable diagram.
(3 X 5 = 15 marks)

Part C

Answer all questions.

15. (a) Discuss the propagation of meridional rays along with the acceptance angle and numerical aperture of step index fiber.
Or
(b) Discuss the modes in graded-index fibers.
16. (a) Give the theory of material dispersion and find an expression for r.m.s. material dispersion.
Or
(b) Explain the microbending losses in fibers.
17. (a) Estimate the power delivered to different types of fibers with respect to LEDs.
Or
(b) Describe the different lensing schemes used for coupling improvements.
18. (a) Discuss the application of optical fibers.
Or
(b) Discuss the principle and design of optical amplifiers.
(4 X 12 = 48 marks)






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