Government polytechnic, Gandhinagar
EC Department
Assignment
Subject:- Optical Communication
Semester ;-4th EC
Code:- 3341103
Chapter-1
1) List advantages of Fiber Optic Communication system.
2) List disadvantages of Fiber Optic Communication system.
3) Explain optical reflection law in detail.
4) Explain optical refraction law in detail.
5) Explain snell’s law in detail.
6) Explain Principle of Light Propagation in Fibers using ray theory.
7) State Skew ray and Meridional rays.
8) Define Reflection, Refraction, Critical Angle and TIR with neat sketches
9) What is Acceptance angle & Numerical Aperture? Derive the equation of NA.
10) List and explain types of fibers with respect to Modes and Refractive Index profile.
11) Explain Inter modal dispersion with derivation.
12) Give the difference between Intra modal and inter modal dispersion
13) Discuss Linear Scattering loss in Fiber.
14) Discuss Bending loss in Fiber.
15) Explain Absorption loss in Fiber.
16) Explain Dispersion shifted and Dispersion flattened fibers in detail.
17) Find Critical Angle, Acceptance Angle & NA for n1= 1.5, n2= 1.47.
Chapter-2
1) Discuss different Fiber materials.
2) Explain Double crucible method with neat sketches
3) Explain Plasma activated CVD and MCVD in detail
4) Explain Slotted core, Loose tube and multi fiber ribbon fiber cable in detail
5) What is splicing and joining with respect to fiber? Explain in detail.
6) Explain Butt joint Fiber connectors in detail..
7) Explain Expanded beam Fiber connectors in detail.
8) Explain Vapour Axial Deposition method.
Chapter-3
1) List characteristics of Ideal Optical Source.
2) Draw & Explain Structure of surface emitter LED in detail.
3) Draw & Explain Edge Emitter LED in detail.
4) Draw & Explain Structure of semiconductor LASER diode.
5) Define Quantum efficiency and Rensponsivity.
6) Compare LED vs. LASER
7) Describe source to fiber coupling.
8) Compare PIN vs. APD.
9) Characteristics of Ideal Optical Detector
10) Explain construction and working of PN photo Diode.
11) Explain construction and working of PIN photo Diode.
12) Explain construction and working of APD Diode.
13) Explain construction and working of Photo Transistor.
14) What is LASER? Explain Spontaneous and Stimulated emission.
15) Find Wavelength for a Photo Diode with Quantum efficiency of 65%, when Photons with
energy 1.5 x 10-19 J are incident. Also find optical power to produce current of 2.5µA.
16) Explain LED analog driver circuit with diagram.
17) Explain LED Digital driver circuit with diagram.
18) Explain LASER driver circuit with diagram.
19) Explain regenerative repeater in detail.
20) Explain optical receiver block diagram in detail.
Chapter-4
1) Explain optical coupler in detail.
2) Explain optical Isolator in detail.
3) Explain optical Switch in detail.
4) Explain Beam Splitter in detail.
5) Explain optical Multiplexer and Demultiplexer.
6) What is Brag gratting? Explain function of it.
7) Write short note on Passive Y-junction Beam Splitter.
8) Write short note on Optical wavelength convertor.
9) Write short note on Semiconductor optical laser amplifier.
10) Explain Raman amplifier in detail.
11) Explain Integrated Optics in detail.
Chapter-5
1) Explain Attenuation measurement in Optical fiber in detail.
2) Explain Intermodal dispersion measurement in Optical fiber in detail.
3) Explain Numerical Aperture measurement in Optical fiber in detail.
4) Explain RI profile measurement in Optical fiber in detail.
5) Write note on optical power meter.
6) Explain WDM and DWDM in detail.
7) Explain fiber optic sensors in detail..
8) Explain Solid state, Gas, Ion laser in detail..
9) Explain Optical time domain reflectometer in detail.