Free-Electron Model of Solid, Density of Energy State, Effect of Temperature on Fermi–Dirac Distribution, Mean Energy of
Electron Gas at Absolute Zero, Illustrative Examples, Review Questions, Numericals.
3. Coherence and Optical Fibers Introduction, Temporal Coherence, Spatial Coherence, Difference Between Temporal and Spatial Coherence, Visibility as a
Measure of Coherence, Spatial Coherence and Size of the Source, Illustrative Examples, Optical Fibers, Fundamental
Definitions and Laws of Optics, Basics of Optical Fiber, Importance of Optical Fibres, Classification of Optical Fibre, Step
Index Fibre, Graded Index Optical Fibre, Acceptance Angle and Numerical Aperture, Numerical Aperture, Light
Propagation in Step Index Optical Fiber, Acceptance Angle and Numerical Aperture, Multipath Time Dispersion, Light
Propagation in Graded Index Optical Fiber, Application of Optical Fiber Communication System, Illustrative Examples,
Review Questions, Numericals.
4. Lasers and Holography Introduction, Absorption, Spontaneous and Stimulated Emission of Radiation: Einstein Coefficients, Absorption,