6 IT 5-OPTICAL COMMUNICATION |
Units: I |
Introduction to optical communication principles of light transmission optical fiber
modes and configurations, Mode theory for circular wave-guides, Single-mode fibers,
Multimode fibers, Numerical aperture, Mode field diameter, V- number, fiber materials,
Fiber fabrication techniques.
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Units: II |
Optical sources, LED’S, LASER diodes, Model reflection noise, Power launching and
coupling, population inversion, fiber splicing, optical connectors, Photo-detectors, PIN,
Avalanche detector, Response time, Avalanche multiplication noise. |
Units: III |
Signal degradation in optical fibers, Attenuation losses, Signal distortion in optical
wave guides, Material dispersion, Wave guide dispersion, Chromatic dispersion, Intermodal
distortion, Pulse broadening in Graded index fibers, Mode coupling, Advance
fiber designs: dispersion shifted, Dispersion flattened, Dispersion compensating fibers,
Design optimization of single mode fibers.
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Units: IV |
Coherent optical fiber communication, Modulation techniques for Homodyne and
Heterodyne systems, Optical filter link design. Rise time budget and link power budget,
Long haul systems bit error rate, line coding, NRZ, RZ, Block Codes eye pattern.
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Units: V |
Advance system and techniques, wavelength division multiplexing, optical amplifiers
semiconductor amplifier, EDFA, Comparison between semiconductor and optical
amplifier, Gain band width, Photonic switching, Optical Networks. Optical fiber bus,
Ring topology, Star architectures, FDDI, SON-ET.
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