NPTEL : NOC:Fiber Optic Communication Technology (Electrical Engineering)

Co-ordinators : Prof. Deepa Venkitesh


Lecture 1 - Introduction to FOCT: Prerequisites, Course Content and Learning Outcomes

Lecture 2 - Communication through the ages

Lecture 3 - Communication: Basics - 1

Lecture 4 - Communication: Basics - 2

Lecture 5 - Digital Communication for Optical Communication

Lecture 6 - Digital modulation: Basics - 2

Lecture 7 - Digital modulation: Basics - 3

Lecture 8 - Optical communication system

Lecture 9 - Assignment Discussion - Week 1

Lecture 10 - Optical Sources

Lecture 11 - Semiconductor gain media- structure, spectrum

Lecture 12 - Optical sources: LED

Lecture 13 - External Quantum Efficiency

Lecture 14 - Modulation Bandwidth of LED

Lecture 15 - Optical and Electrical Bandwidth of LED

Lecture 16 - Emission Pattern of LED

Lecture 17 - Optical Sources: Laser Diodes over LEDs

Lecture 18 - Laser Diodes: Resonator Concepts 1a

Lecture 19 - Laser Diodes: Resonator Concepts 1b

Lecture 20 - Laser Diodes: Resonator Concepts 1c

Lecture 21 - Assignment Discussion - Week 2

Lecture 22 - Laser Diodes: Gain Coefficient

Lecture 23 - Laser Diodes: Photon life time

Lecture 24 - Laser rate equation: Steady State solution1

Lecture 25 - Laser rate equation: LI Chara

Lecture 26 - Laser power derivation

Lecture 27 - Modulation Response of Laser - 1

Lecture 28 - Modulation Response of Laser - 2

Lecture 29 - Modulation Response of Laser - 3

Lecture 30 - Setbacks of direct modulation of laser: Modulation Chirp

Lecture 31 - Setbacks of direct modulation of laser: Transcient Chirp

Lecture 32 - Assignment Discussion - Week 3

Lecture 33 - Recap of direction modulation consequences

Lecture 34 - Noise in Lasers

Lecture 35 - Relative Intensity Noise

Lecture 36 - Laser Phase Noise - 1

Lecture 37 - Laser Phase Noise - 2

Lecture 38 - Effect of Laser Phase Noise: A case study

Lecture 39 - Electro-optic phase modulation

Lecture 40 - Electro-optic intensity modulator

Lecture 41 - Biasing of MZM: BPSK Generation

Lecture 42 - Biasing of MZM: QPSK and 16 QAM Generation

Lecture 43 - Line coding schemes and their bandwidth requirements

Lecture 44 - Assignment Discussion - Week 4

Lecture 45 - Introduction to optical Fiber

Lecture 46 - Attenuation in optical fibers

Lecture 47 - Fiber Modes

Lecture 48 - Modes of a step index fiber - 1

Lecture 49 - Modes of a step index fiber - 2

Lecture 50 - Modes of a step index fiber - 3

Lecture 51 - Modes of a step index fiber - 4

Lecture 52 - Modes of a step index fiber - 5

Lecture 53 - Modes and Cut-off conditions

Lecture 54 - Universal b-V curves

Lecture 55 - Modal Profiles in step index fiber

Lecture 56 - Mode Field Diameter

Lecture 57 - Dispersion- Intermodal dispersion derivation

Lecture 58 - Dispersion-Bit rate distance Product

Lecture 59 - Phase Velocity and Group Velocity - 1

Lecture 60 - Phase Velocity and Group Velocity - 2

Lecture 61 - Material dispersion

Lecture 62 - Waveguide dispersion

Lecture 63 - Total Dispersion in optical fiber

Lecture 64 - Polarization mode dispersion

Lecture 65 - Photodetectors concepts

Lecture 66 - p-n and p-i-n Photodetectors

Lecture 67 - Avalance Photodetector

Lecture 68 - Direct detection receiver and sources of noise

Lecture 69 - Quantifying noises in direct detection receivers

Lecture 70 - SNR and Operation Regimes

Lecture 71 - Noise Equivalent power and SNR in APDs

Lecture 72 - Coherent Receivers

Lecture 73 - SNR analysis of coherent receivers

Lecture 74 - Performance Evaluation - 1

Lecture 75 - Performance Evaluation - 2

Lecture 76 - Performance Metrics: BER,Q, and Receiver Sensitivity

Lecture 77 - Performance Metrics:Q and SNR

Lecture 78 - Quantum limit of photodetection

Lecture 79 - Optical Amplifier

Lecture 80 - Erbium doped fiber amplifier - 1

Lecture 81 - Erbium doped fiber amplifier - 2

Lecture 82 - Erbium doped fiber amplifier - 3

Lecture 83 - Erbium doped fiber amplifier - 4

Lecture 84 - Link Design - Rise Time Budget

Lecture 85 - Link Design - Case Study

Lecture 86 - Link Design - Passive Optical Network and long haul link

Lecture 87 - Dispersion - Recap

Lecture 88 - Dispersion Compensation - Pulse Propagation with disperison

Lecture 89 - Pulse propagation - 2

Lecture 90 - Dispersion Compensation - Dispersion Transfer Function

Lecture 91 - Dispersion Compensation - Case Study

Lecture 92 - Dispersion COmpensation - WDM and DSP

Lecture 93 - Nonlinear Effects- Nonlinear refractive Index

Lecture 94 - Self Phase Modulation

Lecture 95 - Cross Phase Modulation

Lecture 96 - Scattering Processes in optical fibers

Lecture 97 - Stimulated Brillouin Scattering

Lecture 98 - Stimulated Raman Scattering

Lecture 99 - Components - Directional Couplers

Lecture 100 - Components - VOA, Polariser, Polarisation Controllers

Lecture 101 - Components - Isolator

Lecture 102 - Components - Circulator, Definitions

Lecture 103 - Components - Wavelength filters

Lecture 104 - Components - Arrayed Waveguide Gratings, WSS

Lecture 105 - Balanced Detection

Lecture 106 - Polarisation Diverse Coherent Receiver

Lecture 107 - Phase and Polarisation Diverse Coherent Reciever

Lecture 108 - Overview of impairments in coherent optical communication

Lecture 109 - Transceiver impairments - Generation and Compensation

Lecture 110 - Channel Impairments - Generation and Compensation

Lecture 111 - Demo video

Lecture 112 - Introduction to Optical Networks

Lecture 113 - Layers of Optical Network

Lecture 114 - SDH/SONET Layering, Frame Structure

Lecture 115 - Physical Networks Topologies

Lecture 116 - Topology specific Link Design

Lecture 117 - Network Protection

Lecture 118 - Access Networks- PON

Lecture 119 - Optical Interconnects, Data Centers

Lecture 120 - Optical communication for Wireless Fronthauling