Fiber-Optic Communication Systems and Techniques

Lectures

Week 1 Lectures

1. Overview of fiber-optic communication systems Video
2. Review of Maxwell's equations Video
3. Uniform plane waves (UWPs) in free-space Video
4. Properties of UWPs (propagation constant, polarization, and Poynting vector) Video
5. Boundary conditions and reflection from a PEC Video

Week 2 Lectures

6. Obliquely incident waves-I (TE and TM waves, Snell's laws) Video
7. Obliquely incident waves-II (Reflection and transmission coefficients, Brewster angle) Video
8. Total internal reflection Video
9. Ray theory of dielectric slab waveguides Video
10. Transverse resonance condition for slab waveguides Video

Week 3 Lectures

11. Introduction to optical fibers Video
12. Ray theory of light propagation in optical fibers Video
13. Concept of waveguide modes Video
14. Systematic procedure to obtain modes of a waveguide Video
15. Systematic analysis of parallel plate metallic waveguide Video

Week 4 Lectures

16. Systematic analysis of dielectric slab waveguides Video
17. Further discussion on slab waveguides Video
18. Modal analysis of step index optical fiber Video
19. Properties of modes of step-index optical fiber -I Video
20. Properties of modes of step-index optical fiber -II Video

Week 5 Lectures

21. Linearly polarized modes Video
22. Attenuation and power loss in fibers Video
23. Introduction to dispersion in fibers Video
24. Mathematical modelling of dispersion: Transfer function approach Video
25. Pulse propagation equation and its solution: Propagation of Gaussian pulses in fiber Video

Week 6 Lectures

26. Pre-chirped pulses and Inter- and Intra-modal dispersion in optical fibers Video
27. Beam propagation method Video
28. Polarization effects on pulse propagation Video
29. Modes in Optical fibers & Pulse propagation in optical fibers Video
30. Graded index fibers Video

Week 7 Lectures

31. Light sources, detectors and amplifiers Video
32. Basics of lasers-I (Structure of lasers, Process of photon emission) Video
33. Basics of lasers-II (Einstein's theory of radiation) Video
34. Basics of lasers-III (Population inversion and rate equation for lasers) Video
35. Basic properties of semiconductor lasers-I (Energy gap, Intrinsic and Extrinsic semiconductors) Video

Week 8 Lectures

36. Basic properties of semiconductor lasers-II (Fermi level) Video
37. Optical properties of semiconductors-I (Direct bandgap and indirect bandgap, Density of states) Video
38. Optical properties of semiconductors-II (Gain, absorption, recombination rate), Homojunction lasers Video
39. Double heterostructure lasers, Introduction to Quantum well lasers Video
40. Semiconductor optical amplifier Video

Week 9 Lectures

41. Erbium-doped fiber amplifier Video
42. Photodetectors Video
43. Noise in Photodetectors Video
44. Introduction to WDM components Video
45. Couplers, Circulators, FRM and Filters Video

Week 10 Lectures

46. Filter, MUX/DEMUX, Diffraction grating (FBG and Long period grating) Video
47. Optical Modulators-I (Current modulation) Video
48. Optical Modulators-II (Electro-optic modulators) Video
49. Review of communication concepts-I (Deterministic and random signals, Baseband and Passband signals) Video
50. Review of communication concepts-II (Signal and vectors, Signal energy, Orthonormal basis functions) Video

Week 11 Lectures

51. Intensity modulation/ Direct Detection Video
52. BER discussion for OOK systems Video
53. Higher order modulation & Coherent Receiver Video
54. Coherent receiver for BPSK systems and BER calculation Video
55. Recovering Polarization Video

Week 12 Lectures

56. DSP algorithms for Chromatic dispersion mitigation Video
57. DSP algorithms for Carrier phase estimation -I Video
58. DSP algorithms for Carrier phase estimation -II Video
59. Nonlinear effects in fiber Video
60. Four wave mixing, Loss measurement, Dispersion measurement Video
61. Lab Demonstration (Laser diode characteristics, Loss measurement, Optical Intensity Modulation) Video