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 Total Internal Reflection(TIR) in detail.
6) Explain snell’s law in detail.
7) Explain Principle of Light Propagation in Fibers using ray theory in step index fiber.
8) Define Skew ray with diagram.
9) Define Meridional ray with diagram.
10) Define Critical Angle with neat sketches.
11) What is Acceptance angle & Numerical Aperture? Derive the equation of NA.
12) List and explain types of fibers with respect to Modes and Refractive Index profile.
13) Explain Inter modal dispersion with derivation.
14) Give the difference between Intra modal and inter modal dispersion.
15) Discuss Linear Scattering loss in Fiber.
16) Discuss Bending loss in Fiber.
17) Explain Absorption loss in Fiber.
18) Define Dispersion shifted fiber.
19) Define Dispersion flattened fibers.
20) Find Critical Angle, Acceptance Angle & NA for n1= 1.5, n2= 1.47.
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Chapter-2
1) Explain glass fiber.
2) Explain halide glass fiber.
3) Explain active glass fiber.
4) Explain chalgenide glass fiber.
5) Explain Double crucible method with neat sketches.
6) Explain Plasma activated CVD and MCVD in detail.
7) Explain CVD method with neat sketches.
8) Explain Slotted core, Loose tube and multi fiber ribbon fiber cable in detail.
9) What is splicing and joining with respect to fiber?
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10) Explain Fusion Splicing in detail.
11) Explain V-groove splicing in detail.
12) Explain Vapour Axial Deposition method.
13) Explain GRIN ROD lens expanded beam connector.
14) Explain Expanded beam Fiber connectors in detail.
15) Explain Butt joint Fiber connectors in detail.
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Chapter-3.
1) Draw & Explain surface emitter LED in detail.
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2) Draw & Explain Edge Emitter LED in detail.
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3) Draw & Explain Structure and operating principle of semiconductor LASER diode.
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4) Define population Inversion in Semiconductor LASER diode.
5) Define Quantum efficiency.
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6) Define Rensponsivity.
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7) Compare LED vs. LASER.
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8) Explain source to fiber coupling.
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9) Compare PIN vs. APD.
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10) Explain construction and working of PN photo Diode.
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11) Explain construction and working of PIN photo Diode.
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12) Explain working of Avalanche Photo Diode.
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13) What is Impact Ionization process in APD ?
14) Define Spontaneous emission
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15) Define Stimulated emission.
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16) Find Wavelength for a Photo Diode with Quantum efficiency of 65%, when Photons
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with energy 1.5 x 10-19 J are incident. Also find optical power to produce current of 2.5µA.
17) Explain LED analog driver circuit with diagram.
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18) Explain LED Digital driver circuit with diagram.
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19) Explain LASER driver circuit with diagram.
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20) Explain regenerative repeater in detail.
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21) Explain optical receiver block diagram in detail.
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Chapter-4
1) Explain diffusion optical coupler in detail.
2) Explain distributive optical coupler in detail.
3) Explain wave length dependent optical coupler in detail
4) Explain optical Isolator in detail.
5) Explain Optical gatting wavelength converter
6) Explain Wave mixing wavelength converter
7) Explain optical Switch in detail.
8) Explain Beam Splitter in detail.
9) Explain optical Multiplexer and Demultiplexer.
10) What is Brag gratting?
11) Explain fiber bragg gratting
12) Explain basic operation of generic optical amplifier
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13) Write short note on Semiconductor optical laser amplifier.
14) Explain EDFA.
15) Explain Raman amplifier in detail.
16) Explain Integrated Optics in detail.
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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) What is WDM ?
7) What is DWDM ?
8) Explain fiber optic sensors in detail..
9) Explain Solid state LASER
10) Explain Gas LASER
11) Explain Ion laser
12) Explain Optical time domain reflectometer (OTDR) in detail.
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