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Optical Communications

Optical Communications. Instructor: Dr. Pradeep Kumar K, Department of Electrical Engineering, IIT Kanpur. This course offers a gradual approach to optical communications with emphasis on latest developments in coherent optical communications. Starting from a broad introduction to transmitters and receivers, this course covers optical fibers and waveguides, lasers, detectors, optical amplifiers, channel impairments and their mitigation using signal processing algorithms. Matlab models will be discussed. (from nptel.ac.in)

Lecture 20 - Reflection of Waves

This lecture covers the following topics: 1. Reflection of Waves 2. Total internal reflection 3. Snell's law.

Go to the Course Home or watch other lectures:

Lecture 01 - Overview of Fiber Optic Communications

Lecture 02 - Optical Transmitter: Block Diagram, Modulation Types, Laser as a Oscillator

Lecture 03 - Optical Transmitter: Phase Modulator, Mach-Zehnder Interferometer (MZM)

Lecture 04 - Optical Transmitter: Mach-Zehnder Interferometer (MZM)

Lecture 05 - Optical Transmitter: Intensity and Phase Modulation of Digital Data, I/Q Modulator

Lecture 06 - Intensity Modulation using MZM, Pulse Carver

Lecture 07 - Review of Signals and Representations I

Lecture 08 - Review of Signals and Representations II

Lecture 09 - Digital Modulations: Amplitude Shift Keying, Binary Phase Shift Keying

Lecture 10 - Review of Signals and Representations III

Lecture 11 - Review of Signals and Representations IV

Lecture 12 - Digital Modulations: Modulation Techniques

Lecture 13 - Digital Modulations: Modulation Techniques (cont.)

Lecture 14 - Digital Modulations: BPSK, QPSK, DQPSK, M-ary PSK Modulation

Lecture 15 - Optical Receivers: Direct Detection, Delay Line Detection

Lecture 16 - Optical Receivers: Coherent Receiver, Polarization Diversity

Lecture 17 - Optical Modulator: Physical Structure

Lecture 18 - Propagation of Electromagnetic Wave

Lecture 19 - Review of Electromagnetic Theory

Lecture 20 - Reflection of Waves

Lecture 21 - Optical Fiber: Introduction, Types of Fiber, Optical Window

Lecture 22 - Optical Fiber: Total Internal Reflection, Multimode Fiber, Modal Dispersion

Lecture 23 - Modes in Optical Fiber I

Lecture 24 - Modes in Optical Fiber: Solution of EH Field Equation in Fiber

Lecture 25 - Modes in Optical Fiber: Modes in Fiber and their Solution

Lecture 26 - Dispersion in Fibers: Types of Dispersion, Waveguide Dispersion

Lecture 27 - Dispersion in Fibers: Brief Introduction to Dispersion, Chirping

Lecture 28 - Wrapping Up Fiber Parameters

Lecture 29 - System Design: Rise Time Budget, Power Budget, Typical Losses in Fiber

Lecture 30 - Passive WDM Components: Coupled Mode Theory, Circulator, Isolator

Lecture 31 - Passive WDM Components: Filter and Fiber Bragg Grating

Lecture 32 - Detection of Light

Lecture 33 - Detection of Light: PIN Photodiode, I-V Characteristics of PIN

Lecture 34 - Response Time and Noise in Detectors

Lecture 35 - Noise in Photodiodes: Response Time, Dark Current, Shot Noise

Lecture 36 - Noise in Photodiodes: Thermal Noise, SNR in PD

Lecture 37 - Light Sources: Absorption, Spontaneous and Stimulated Emission, Einstein Coefficients

Lecture 38 - Light Sources: Population Inversion, LASER

Lecture 39 - Semiconductor Laser Diodes

Lecture 40 - Optical Communication - Pulse Shape and Bandwidth Issues

Lecture 41 - Power Spectral Density

Lecture 42 - Power Spectral Density (cont.)

Lecture 43 - Advantage of Coherent Receiver

Lecture 44 - Dispersion Induced Limitations

Lecture 45 - Optical Amplifiers I

Lecture 46 - Optical Amplifiers II

Lecture 47 - Noise in Optical Amplifiers

Lecture 48 - Noise in Optical Amplifiers (cont.)

Lecture 49 - Amplified Spontaneous Emission (ASE) Induced Limitations

Lecture 50 - Determining BER in OOK System

Lecture 51 - BER Determination

Lecture 52 - Eye Diagram and Higher Modulation Techniques

Lecture 53 - Higher Modulation Techniques (cont.)

Lecture 54 - Optical OFDM