Learn · Fiber-Optic Communication Systems and Techniques
Lecture 39 of 61Week 8 Lectures
Double heterostructure lasers, Introduction to Quantum well lasers
Prof. K. Pradeep Kumar · IIT Kanpur
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- Fiber-Optic Communication Systems and Techniques, IIT Kanpur (at NPTEL)
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All the lectures
- Overview of fiber-optic communication systems
- Review of Maxwell's equations
- Uniform plane waves (UWPs) in free-space
- Properties of UWPs (propagation constant, polarization, and Poynting vector)
- Boundary conditions and reflection from a PEC
- Obliquely incident waves-I (TE and TM waves, Snell's laws)
- Obliquely incident waves-II (Reflection and transmission coefficients, Brewster angle)
- Total internal reflection
- Ray theory of dielectric slab waveguides
- Transverse resonance condition for slab waveguides
- Introduction to optical fibers
- Ray theory of light propagation in optical fibers
- Concept of waveguide modes
- Systematic procedure to obtain modes of a waveguide
- Systematic analysis of parallel plate metallic waveguide
- Systematic analysis of dielectric slab waveguides
- Further discussion on slab waveguides
- Modal analysis of step index optical fiber
- Properties of modes of step-index optical fiber -I
- Properties of modes of step-index optical fiber -II
- Linearly polarized modes
- Attenuation and power loss in fibers
- Introduction to dispersion in fibers
- Mathematical modelling of dispersion: Transfer function approach
- Pulse propagation equation and its solution: Propagation of Gaussian pulses in fiber
- Pre-chirped pulses and Inter- and Intra-modal dispersion in optical fibers
- Beam propagation method
- Polarization effects on pulse propagation
- Modes in Optical fibers & Pulse propagation in optical fibers
- Graded index fibers
- Light sources, detectors and amplifiers
- Basics of lasers-I (Structure of lasers, Process of photon emission)
- Basics of lasers-II (Einstein's theory of radiation)
- Basics of lasers-III (Population inversion and rate equation for lasers)
- Basic properties of semiconductor lasers-I (Energy gap, Intrinsic and Extrinsic semiconductors)
- Basic properties of semiconductor lasers-II (Fermi level)
- Optical properties of semiconductors-I (Direct bandgap and indirect bandgap, Density of states)
- Optical properties of semiconductors-II (Gain, absorption, recombination rate), Homojunction lasers
- Double heterostructure lasers, Introduction to Quantum well lasers
- Semiconductor optical amplifier
- Erbium-doped fiber amplifier
- Photodetectors
- Noise in Photodetectors
- Introduction to WDM components
- Couplers, Circulators, FRM and Filters
- Filter, MUX/DEMUX, Diffraction grating (FBG and Long period grating)
- Optical Modulators-I (Current modulation)
- Optical Modulators-II (Electro-optic modulators)
- Review of communication concepts-I (Deterministic and random signals, Baseband and Passband signals)
- Review of communication concepts-II (Signal and vectors, Signal energy, Orthonormal basis functions)
- Intensity modulation/ Direct Detection
- BER discussion for OOK systems
- Higher order modulation & Coherent Receiver
- Coherent receiver for BPSK systems and BER calculation
- Recovering Polarization
- DSP algorithms for Chromatic dispersion mitigation
- DSP algorithms for Carrier phase estimation -I
- DSP algorithms for Carrier phase estimation -II
- Nonlinear effects in fiber
- Four wave mixing, Loss measurement, Dispersion measurement
- Lab Demonstration (Laser diode characteristics, Loss measurement, Optical Intensity Modulation)