B.E-B.E Electronics and Tele-Communication Engineering Optical Fiber Communication(Sathyabama University, Chennai, Tamil Nadu-2010)
Friday, 23 August 2013 03:05Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - ETCE
Title of the Paper :Optical Fiber Communication Max. Marks :80
Sub. Code :525701/625701 Time : 3 Hours
Date :01/03/2010 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. Write the expression for the refractive index in graded index fibers.
2. Define Numerical aperture of a step index fiber.
3. What is the necessity of cladding for an optical fiber?
4. What is the principle used in the working of fibers as light guides?
5. Define acceptance angle.
6. Why do we prefer index single mode fiber for long distance communication?
7. Give the 2 analysis that are used to ensure system performance.
8. Explain briefly about link power budget analysis?
9. Define quantum efficiency.
10. What are the conditions to be met for a high signal-to-noise ratio in a photo detector?
PART – B (5 x 12 = 60)
Answer All the Questions
11. Discuss elaborately the mode theory of circular waveguides.
(or)
12. What is Pulse Broadening? Derive the expression for the same in Graded index waveguides.
13. Discuss the structure and numerical aperture of graded index fiber.
(or)
14. Give an account on single mode lasers and modulation of laser diodes.
15. Detail out the various methods of fiber splicing.
(or)
16. Write in detail about avalanche photodiodes and explain briefly about photodetector noise and SNR.
17. Discuss the fundamental receiver operation with neat block diagram.
(or)
18. Discuss the performance of digital receiver by defining the probability of error.
19. (a) Discuss the operational principles of WDM.
(b) Describe the key features of WDM.
(or)
20. With neat sketch explain the concepts and principles of the SONET/SDH network.
| Earning: ₹ 3.02/- |
