# Fiber-Optic Communication Systems and Techniques

- Institution: IIT Kanpur
- Department: Electrical Engineering
- Teacher: Prof. K. Pradeep Kumar
- Level: Undergraduate
- Language: English
- Subjects: Engineering
- Source: [NPTEL](https://nptel.ac.in/courses/108104113)
- Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.)
- Syllabus: [at the source](https://nptel.ac.in/courses/108104113)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

## Lectures

1. [Overview of fiber-optic communication systems](https://invisiblenetwork.ai/learn/nptel/108104113/469a44152500) (Video)
2. [Review of Maxwell's equations](https://invisiblenetwork.ai/learn/nptel/108104113/7ee80c855da4) (Video)
3. [Uniform plane waves (UWPs) in free-space](https://invisiblenetwork.ai/learn/nptel/108104113/aebd7ea86596) (Video)
4. [Properties of UWPs (propagation constant, polarization, and Poynting vector)](https://invisiblenetwork.ai/learn/nptel/108104113/5008f62040f3) (Video)
5. [Boundary conditions and reflection from a PEC](https://invisiblenetwork.ai/learn/nptel/108104113/e2965ebd254a) (Video)
6. [Obliquely incident waves-I (TE and TM waves, Snell's laws)](https://invisiblenetwork.ai/learn/nptel/108104113/5da778e12d62) (Video)
7. [Obliquely incident waves-II (Reflection and transmission coefficients, Brewster angle)](https://invisiblenetwork.ai/learn/nptel/108104113/8b0687c5c98b) (Video)
8. [Total internal reflection](https://invisiblenetwork.ai/learn/nptel/108104113/b992ab6869cc) (Video)
9. [Ray theory of dielectric slab waveguides](https://invisiblenetwork.ai/learn/nptel/108104113/79034d019c0d) (Video)
10. [Transverse resonance condition for slab waveguides](https://invisiblenetwork.ai/learn/nptel/108104113/fa7f41d407b8) (Video)
11. [Introduction to optical fibers](https://invisiblenetwork.ai/learn/nptel/108104113/14ede1e805b5) (Video)
12. [Ray theory of light propagation in optical fibers](https://invisiblenetwork.ai/learn/nptel/108104113/3c375a47dfa9) (Video)
13. [Concept of waveguide modes](https://invisiblenetwork.ai/learn/nptel/108104113/c93fd1eaed18) (Video)
14. [Systematic procedure to obtain modes of a waveguide](https://invisiblenetwork.ai/learn/nptel/108104113/88ac223fd119) (Video)
15. [Systematic analysis of parallel plate metallic waveguide](https://invisiblenetwork.ai/learn/nptel/108104113/2d7bcfec12f9) (Video)
16. [Systematic analysis of dielectric slab waveguides](https://invisiblenetwork.ai/learn/nptel/108104113/290d5db395e9) (Video)
17. [Further discussion on slab waveguides](https://invisiblenetwork.ai/learn/nptel/108104113/b462e214f9fc) (Video)
18. [Modal analysis of step index optical fiber](https://invisiblenetwork.ai/learn/nptel/108104113/2e53f6a03310) (Video)
19. [Properties of modes of step-index optical fiber -I](https://invisiblenetwork.ai/learn/nptel/108104113/e7673b422b25) (Video)
20. [Properties of modes of step-index optical fiber -II](https://invisiblenetwork.ai/learn/nptel/108104113/1244a05ee0eb) (Video)
21. [Linearly polarized modes](https://invisiblenetwork.ai/learn/nptel/108104113/201d3ad8dd89) (Video)
22. [Attenuation and power loss in fibers](https://invisiblenetwork.ai/learn/nptel/108104113/cdd6c1d51c50) (Video)
23. [Introduction to dispersion in fibers](https://invisiblenetwork.ai/learn/nptel/108104113/4db716716311) (Video)
24. [Mathematical modelling of dispersion: Transfer function approach](https://invisiblenetwork.ai/learn/nptel/108104113/8716c5f475f9) (Video)
25. [Pulse propagation equation and its solution: Propagation of Gaussian pulses in fiber](https://invisiblenetwork.ai/learn/nptel/108104113/f73dfff15749) (Video)
26. [Pre-chirped pulses and Inter- and Intra-modal dispersion in optical fibers](https://invisiblenetwork.ai/learn/nptel/108104113/2ce6566944d6) (Video)
27. [Beam propagation method](https://invisiblenetwork.ai/learn/nptel/108104113/9d63834b16ec) (Video)
28. [Polarization effects on pulse propagation](https://invisiblenetwork.ai/learn/nptel/108104113/c4014f4a13ae) (Video)
29. [Modes in Optical fibers & Pulse propagation in optical fibers](https://invisiblenetwork.ai/learn/nptel/108104113/405934212ce6) (Video)
30. [Graded index fibers](https://invisiblenetwork.ai/learn/nptel/108104113/684b710c912c) (Video)
31. [Light sources, detectors and amplifiers](https://invisiblenetwork.ai/learn/nptel/108104113/995ca9510dfc) (Video)
32. [Basics of lasers-I (Structure of lasers, Process of photon emission)](https://invisiblenetwork.ai/learn/nptel/108104113/28659053fd7c) (Video)
33. [Basics of lasers-II (Einstein's theory of radiation)](https://invisiblenetwork.ai/learn/nptel/108104113/c2aa8a5c99f5) (Video)
34. [Basics of lasers-III (Population inversion and rate equation for lasers)](https://invisiblenetwork.ai/learn/nptel/108104113/690b9b680fc7) (Video)
35. [Basic properties of semiconductor lasers-I (Energy gap, Intrinsic and Extrinsic semiconductors)](https://invisiblenetwork.ai/learn/nptel/108104113/7f77317d6369) (Video)
36. [Basic properties of semiconductor lasers-II (Fermi level)](https://invisiblenetwork.ai/learn/nptel/108104113/feae9eea6c85) (Video)
37. [Optical properties of semiconductors-I (Direct bandgap and indirect bandgap, Density of states)](https://invisiblenetwork.ai/learn/nptel/108104113/690cfec40926) (Video)
38. [Optical properties of semiconductors-II (Gain, absorption, recombination rate), Homojunction lasers](https://invisiblenetwork.ai/learn/nptel/108104113/2117a5c89478) (Video)
39. [Double heterostructure lasers, Introduction to Quantum well lasers](https://invisiblenetwork.ai/learn/nptel/108104113/f50a9a8582b7) (Video)
40. [Semiconductor optical amplifier](https://invisiblenetwork.ai/learn/nptel/108104113/121828738498) (Video)
41. [Erbium-doped fiber amplifier](https://invisiblenetwork.ai/learn/nptel/108104113/7c258ea5289d) (Video)
42. [Photodetectors](https://invisiblenetwork.ai/learn/nptel/108104113/6494e38ef6ee) (Video)
43. [Noise in Photodetectors](https://invisiblenetwork.ai/learn/nptel/108104113/fe4a3178c7d2) (Video)
44. [Introduction to WDM components](https://invisiblenetwork.ai/learn/nptel/108104113/6ae39535f5c7) (Video)
45. [Couplers, Circulators, FRM and Filters](https://invisiblenetwork.ai/learn/nptel/108104113/c963f0e5d592) (Video)
46. [Filter, MUX/DEMUX, Diffraction grating (FBG and Long period grating)](https://invisiblenetwork.ai/learn/nptel/108104113/f6adc5d44549) (Video)
47. [Optical Modulators-I (Current modulation)](https://invisiblenetwork.ai/learn/nptel/108104113/96baad4f93d7) (Video)
48. [Optical Modulators-II (Electro-optic modulators)](https://invisiblenetwork.ai/learn/nptel/108104113/f515b9a71a03) (Video)
49. [Review of communication concepts-I (Deterministic and random signals, Baseband and Passband signals)](https://invisiblenetwork.ai/learn/nptel/108104113/185f4aa7e18b) (Video)
50. [Review of communication concepts-II (Signal and vectors, Signal energy, Orthonormal basis functions)](https://invisiblenetwork.ai/learn/nptel/108104113/de73238c2289) (Video)
51. [Intensity modulation/ Direct Detection](https://invisiblenetwork.ai/learn/nptel/108104113/d7a2caa5a479) (Video)
52. [BER discussion for OOK systems](https://invisiblenetwork.ai/learn/nptel/108104113/e3c386c3784b) (Video)
53. [Higher order modulation & Coherent Receiver](https://invisiblenetwork.ai/learn/nptel/108104113/11a23d1b82a7) (Video)
54. [Coherent receiver for BPSK systems and BER calculation](https://invisiblenetwork.ai/learn/nptel/108104113/e535c1f532dd) (Video)
55. [Recovering Polarization](https://invisiblenetwork.ai/learn/nptel/108104113/e93ba0b9dd79) (Video)
56. [DSP algorithms for Chromatic dispersion mitigation](https://invisiblenetwork.ai/learn/nptel/108104113/43c3490f96b2) (Video)
57. [DSP algorithms for Carrier phase estimation -I](https://invisiblenetwork.ai/learn/nptel/108104113/7fb21081b8da) (Video)
58. [DSP algorithms for Carrier phase estimation -II](https://invisiblenetwork.ai/learn/nptel/108104113/384055788cb0) (Video)
59. [Nonlinear effects in fiber](https://invisiblenetwork.ai/learn/nptel/108104113/8a8422ccd027) (Video)
60. [Four wave mixing, Loss measurement, Dispersion measurement](https://invisiblenetwork.ai/learn/nptel/108104113/397de4374289) (Video)
61. [Lab Demonstration (Laser diode characteristics, Loss measurement, Optical Intensity Modulation)](https://invisiblenetwork.ai/learn/nptel/108104113/2e26cc6b175d) (Video)