Exam Details
| Subject | optical communication and networks | |
| Paper | ||
| Exam / Course | b.e.(electronics and instrumentation engineering) | |
| Department | ||
| Organization | SETHU INSTITUTE OF TECHNOLOGY | |
| Position | ||
| Exam Date | May, 2017 | |
| City, State | tamil nadu, pulloor |
Question Paper
Reg. No.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017
Seventh Semester
Electronics and Communication Engineering
01UEC702 OPTICAL COMMUNICATION AND NETWORKS
(Regulation 2013)
Duration: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 x 2 20 Marks)
1. What is the maximum core diameter for a fiber if it is to operate at single mode at a wavelength of 1550nm if the N.A is 0.12?
2. Why do we prefer step index single mode fiber for long distance communication?
3. What are the three different mechanisms which cause absorption?
4. Draw the schematic representation of expanded beam connectors.
5. Draw the three key transition processes involved in laser action.
6. Define responsivity of a photodiode.
7. Define quantum limit.
8. State the significance of maintaining the fiber outer diameter constant.
9. What are the pumping mechanisms used in erbium doped fiber amplifiers?
10. Illustrate inter-channel cross talk that occurs in a WDM system.
Question Paper Code: 31472
2
31472
PART B x 16 80 Marks)
11. Explain with neat diagram the elements of an optical fiber transmission link. List the advantages of optical communication. Or A multimode step index fiber with a core diameter of 80μm and a relative index difference of 1.5% is operating at the wavelength of 850nm. If the core refractive index is 1.48, estimate the normalized frequency for the fiber and the number of guided modes. Define total internal reflection, acceptance angle and numerical aperture.
12. Discuss in detail about material and waveguide dispersion. Or Explain various types of fiber splicing techniques and fiber connectors. 13. Draw and explain the construction and working of surface and edge emitting LED. State and derive the internal quantum efficiency of a LED. Or Explain in detail about construction and working principle of PIN Photodiode.
14. Explain the fundamental receiver operation in optical communication link. Or Explain the measurement technique used in the case of fiber attenuation.
15. Explain the layered architecture of SONET/SDH with neat diagram. Or What is broadcast-and-select multi hop network? Explain. Write a detailed note on optical CDMA and its applications.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017
Seventh Semester
Electronics and Communication Engineering
01UEC702 OPTICAL COMMUNICATION AND NETWORKS
(Regulation 2013)
Duration: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 x 2 20 Marks)
1. What is the maximum core diameter for a fiber if it is to operate at single mode at a wavelength of 1550nm if the N.A is 0.12?
2. Why do we prefer step index single mode fiber for long distance communication?
3. What are the three different mechanisms which cause absorption?
4. Draw the schematic representation of expanded beam connectors.
5. Draw the three key transition processes involved in laser action.
6. Define responsivity of a photodiode.
7. Define quantum limit.
8. State the significance of maintaining the fiber outer diameter constant.
9. What are the pumping mechanisms used in erbium doped fiber amplifiers?
10. Illustrate inter-channel cross talk that occurs in a WDM system.
Question Paper Code: 31472
2
31472
PART B x 16 80 Marks)
11. Explain with neat diagram the elements of an optical fiber transmission link. List the advantages of optical communication. Or A multimode step index fiber with a core diameter of 80μm and a relative index difference of 1.5% is operating at the wavelength of 850nm. If the core refractive index is 1.48, estimate the normalized frequency for the fiber and the number of guided modes. Define total internal reflection, acceptance angle and numerical aperture.
12. Discuss in detail about material and waveguide dispersion. Or Explain various types of fiber splicing techniques and fiber connectors. 13. Draw and explain the construction and working of surface and edge emitting LED. State and derive the internal quantum efficiency of a LED. Or Explain in detail about construction and working principle of PIN Photodiode.
14. Explain the fundamental receiver operation in optical communication link. Or Explain the measurement technique used in the case of fiber attenuation.
15. Explain the layered architecture of SONET/SDH with neat diagram. Or What is broadcast-and-select multi hop network? Explain. Write a detailed note on optical CDMA and its applications.
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- analog circuits
- analog communication
- analytical instruments
- antenna and wave propagation
- application of instrumentation in aerospace and navigation
- applied digital signal processing
- biomedical instrumentation
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- communication engineering
- computer architecture and organization
- control engineering
- data communication and networks
- data structures and algorithm analysis
- data structures and algorithms
- digital communication
- digital electronics
- digital electronics and design
- digital image processing
- digital signal processing
- electrical circuits and networks
- electrical machines
- electrical measurements
- electromagnetic fields
- electronic circuits
- electronic measurements and instrumentation
- embedded and real time systems
- environmental monitoring instruments
- environmental science and engineering
- fibre optics and laser instruments
- high speed networks
- industrial data networks
- industrial electronics
- industrial instrumentation – ii
- industrial instrumentation-i
- information theory and coding
- instrumentation for power plants
- instrumentation system design
- laser and fiber optics instrumentation
- linear control engineering
- linear integrated circuits and applications
- logic and distributed control systems
- microprocessors and interfacing
- microprocessors microcontrollers and applications
- microwave engineering
- mobile ad-hoc networks
- modern electronic instrumentation
- nano electronics
- numerical methods
- optical communication and networks
- principles of electrical machines
- probability and random processes
- process control instrumentation
- project management and finance
- qualitative and quantitative aptitude
- real time embedded systems architecture
- reliability and safety engineering
- robotics and automation
- satellite communication principles and applications
- sensors and transducers
- signals and systems
- thermodynamics and fluid mechanics
- transforms and partial differential equations
- transmission lines and waveguides
- value education and human rights
- vlsi design
- vlsi system design
- wireless communication systems
- wireless sensor networks