EC6702 Optical Communication and Networks Previous Year Question Paper
To Facilitate the knowledge about optical fiber sources and transmission techniques
To Enrich the idea of optical fiber networks algorithm such as SONET/SDH and optical CDMA.
To Explore the trends of optical fiber measurement systems.
UNIT I INTRODUCTION TO OPTICAL FIBERS
Evolution of fiber optic system- Element of an Optical Fiber Transmission link– Total internal reflection-Acceptance angle –Numerical aperture – Skew rays Ray Optics-Optical Fiber Modes and Configurations -Mode theory of Circular Wave guides- Overview of Modes-Key Modal concepts-Linearly Polarized Modes -Single Mode Fibers-Graded Index fiber structure.
UNIT II SIGNAL DEGRADATION OPTICAL FIBERS
Attenuation – Absorption losses, Scattering losses, Bending Losses, Core and Cladding losses, Signal Distortion in Optical Wave guides-Information Capacity determination -Group Delay-Material Dispersion, Wave guide Dispersion, Signal distortion in SM fibers-Polarization Mode dispersion, Intermodal dispersion, Pulse Broadening in GI fibers-Mode Coupling -Design Optimization of SM fibers-RI profile and cut-off wavelength.
UNIT III FIBER OPTICAL SOURCES AND COUPLING
Direct and indirect Band gap materials-LED structures -Light source materials -Quantum efficiency and LED power, Modulation of a LED, lasers Diodes-Modes and Threshold condition -Rate equations -External Quantum efficiency -Resonant frequencies -Laser Diodes, Temperature effects, Introduction to Quantum laser, Fiber amplifiers- Power Launching and coupling, Lencing schemes, Fiber -to- Fiber joints, Fiber splicing-Signal to Noise ratio , Detector response time.
UNIT IV FIBER OPTIC RECEIVER AND MEASUREMENTS
Fundamental receiver operation, Pre amplifiers, Error sources – Receiver Configuration– Probability of Error – Quantum limit.Fiber Attenuation measurements- Dispersion measurements – Fiber Refractive index profile measurements – Fiber cut- off Wave length Measurements – Fiber Numerical Aperture Measurements – Fiber diameter measurements.
UNIT V OPTICAL NETWORKS AND SYSTEM TRANSMISSION
Basic Networks – SONET / SDH – Broadcast – and –select WDM Networks –Wavelength Routed Networks – Non linear effects on Network performance –-Link Power budget -Rise time budget-
Noise Effects on System Performance-Operational Principles of WDM Performance of WDM + EDFA system – Solutions – Optical CDMA – Ultra High Capacity Networks.
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EC6702 Optical Communication and Networks Previous Year Question Paper for Regulation 2013, EC6702, Optical Communication and Networks, Anna university Previous Year Question Paper for Regulation 2013, EC6702 Optical Communication and Networks Previous Year Question Paper, EC6702 Regulation 2013