Exam Details
| Subject | Optical Fiber Communication | |
| Paper | ||
| Exam / Course | BTCVI / BTECVI / BTELVI | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
Establish the relationship between the acceptance angle, numerical aperture and the refractive index for the fiber core and cladding.
Compare the advantages and disadvantages of multimode step index fiber with respect to single mode step index fiber, when used as an optical channel.
What is meant by a graded index optical fiber? Derive an expression for the possible refractive index profile of a graded index fiber.
Explain what is meant by critical bending radius for an optical fiber.
Discuss absorption losses in optical fibers.
Describe various linear scattering losses in optical fibers.
What is meant by modal noise in optical fibers? Suggest how it may be avoided.
Explain fiber birefringence in single mode fibers.
Discuss degradation mechanism in injection lasers.
Compare LEDs with injection laser as a source used in optical fiber communication.
The carrier velocity in a silicon photodiode with 25 gm depletion layer width IS 3x10^4 m/sec. Determine the maximum response time for the device.
Compare the detection process of p-n diode with diode.
Define quantum efficiency and responsivity of a photodetector.
Discuss briefly noise in Avalanche Photo Diode receiver.
8. An analog optical fiber system operating at a wavelength of 1 gm has a post-detection bandwidth of 5 MHz. Assuming an ideal detector and considering only quantum noise on the signal, calculate the incident optical power necessary to achieve a signal-to-noise ratio of 50 dB at the receiver.
Describe the advantages of optical fiber communication.
What is Automatic Gam: Control equalisation? Why is it required?
10. Write short notes on any two of the following:
Raman Scattering
Mie Scattering
Mode Hopping in Injection Lasers
Compare the advantages and disadvantages of multimode step index fiber with respect to single mode step index fiber, when used as an optical channel.
What is meant by a graded index optical fiber? Derive an expression for the possible refractive index profile of a graded index fiber.
Explain what is meant by critical bending radius for an optical fiber.
Discuss absorption losses in optical fibers.
Describe various linear scattering losses in optical fibers.
What is meant by modal noise in optical fibers? Suggest how it may be avoided.
Explain fiber birefringence in single mode fibers.
Discuss degradation mechanism in injection lasers.
Compare LEDs with injection laser as a source used in optical fiber communication.
The carrier velocity in a silicon photodiode with 25 gm depletion layer width IS 3x10^4 m/sec. Determine the maximum response time for the device.
Compare the detection process of p-n diode with diode.
Define quantum efficiency and responsivity of a photodetector.
Discuss briefly noise in Avalanche Photo Diode receiver.
8. An analog optical fiber system operating at a wavelength of 1 gm has a post-detection bandwidth of 5 MHz. Assuming an ideal detector and considering only quantum noise on the signal, calculate the incident optical power necessary to achieve a signal-to-noise ratio of 50 dB at the receiver.
Describe the advantages of optical fiber communication.
What is Automatic Gam: Control equalisation? Why is it required?
10. Write short notes on any two of the following:
Raman Scattering
Mie Scattering
Mode Hopping in Injection Lasers
Other Question Papers
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- Centre for Corporate Education, Training & Consultancy (CCETC)
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Subjects
- Advance Microprocessor And Architecture
- Analog and Mixed Mode VLSI Design
- Analog Communication
- Analog Electronic Circuits
- Analog Integrated Circuits Design
- Antennas and Propagation
- B10-Informatics
- Basics Of Electronics Engineering
- Computer Architecture
- Computer Communication Networks
- Control Engineering
- Data Communication And Network
- Device Modelling For Circuit Simulation
- Digital Electronics
- Digital Signal Processing
- Digital System Design
- Electromagnetic Field Theory
- Electronic Measurement and Inst
- Electronic Switching Circuits
- Embedded System Design
- Information Theory And Coding
- Linear Integrated Circuits
- Microcontrollers
- Microprocessor And Its Applications
- Microwave And Radar Engineering
- Multirate Systems
- Optical Fiber Communication
- Power Electronics
- Satellite And Tv Engineering
- Signal And Systems
- Wireless Communication