Fiber Optic Communication Technology

Week 1 : Motivation for fiber optic communication, Introduction to digital modulation, Overview of Optical Communication System
Week 2 : Optical Sources : LED - Working principle, Efficiency, Modulation bandwidth, Emission Pattern, Need for Laser Diodes, Resonator Concepts

Week 3 : Optical Sources : Laser Diodes - Resonator, FSR, Q, Single Longitudinal Mode Lasers, Photon Lifetime, Semiconductor
Laser Rate equation, steady state solution, LI characteristics, Output power from laser, Modulation response of LD,Chirp

Week 4 : Optical Sources- Noise in Lasers- Relative Intensity Noise, Phase noise, Effect of noise on different modulation schemes, External Modulation- generation of OOK, BPSK, QPSK and 16QAM

Week 5 : Optical Fibers - Attenuation in fibers, Modes of a step index fiber, b-V curves, Modal profiles

Week 6 : Optical Fibers- Dispersion in fibers, intermodal dispersion, material dispersion, waveguide dispersion, polarisation mode dispersion

Week 7 : Photo detectors- PIN and APD Detectors, Sources of Noise- shot noise, thermal noise, NEP, SNR, Heterodyne detectors, SNR in heterodyne detection

Week 8 : Optical Link Design - Performance Evaluation of an OOK link- BER, Q, Receiver Sensitivity, Optical Amplifiers- EDFA

Week 9 : Optical Link Design Link Budget, Case Studies, Dispersion COmpensation, Nonlinear Effects- Self Phase Modulation

Week 10 : Nonlinear effects - Cross Phase Modulation, Four Wave Mixing, Stimulated Raman and Brillouin Scattering, Commonly used components in Optical Networks

Week 11 : Coherent Detection and DSP : Balanced Detection, Phase and Polarisation Diverse Coherent Detection, Digital Signal Processing for compensation of phase noise, frequency offset, chromatic dispersion, polarisation mode dispersion

Week 12 : Optical Networks : SDH/SONET Layering, Frame Structure , Physical network topologies, Access Networks- PON ,Optical Interconnects, Data Centers ,Optical communication for Wireless Fronthauling.