EC2402 Optical Communication and Networking Important Questions
1. Explain the Ultra high capacity WDM systems and discuss the system performance of WDM and
EDFA
2. Describe the characteristic of responsivity against wavelength for an ideal silicon photodiode with
the help of its expression
3. What are the fiber modes? Explain mode theory for optical fibers in detail
4. Compare Single mode fibers and Graded index fibers. Explain the requirements for fiber materials
5. Explain various types of fiber splicing techniques and fiber connectors
6. Explain fiber diameter and numerical aperture measurements
7. Derive the internal quantum efficiency of an LED.
8. Discuss the signal distortion in single mode fibers
9. Discuss the LASER diode principle, modes and threshold conditions
10. Explain the error sources of fundamental receiver operations. Discuss the performance of digital
receiver by defining the probability of error
11. Discuss various kinds of losses that an optical signal might suffer while propagating through fiber,
which is most important one? What is the effect of these losses on light power and pulse shape?
12. Derive the internal quantum efficiency and shows the variation in threshold current with
temperature for ILD
13. Draw and explain the operation of high impedance FET and BJT preamplifiers
14. Discuss the propagation modes in single -mode fiber
15. Explain the following i) Fiber attenuation measurements, ii) Fiber cutoff wavelength
measurements
16. Discuss the mode theory of circular waveguide
17. Explain the basic frame structure and network architecture of SONET
18. Explain the salient feature of solitions using relevant expressions and diagrams
19. Derive an expression for material dispersion
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