# Fiber Optic Communication Technology

- Institution: IIT Madras
- Department: Electrical Engineering
- Teacher: Prof. Deepa Venkitesh
- Level: Undergraduate
- Language: English
- Subjects: Engineering
- Source: [NPTEL](https://nptel.ac.in/courses/108106167)
- Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.)
- Syllabus: [at the source](https://nptel.ac.in/courses/108106167)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

FOCT is a graduate level course, intended to expose the students to the physical layer elements and seamlessly provide a transition from the physical layer issues to data link layer issues in optical communication systems and networks.

INTENDED AUDIENCE : Any Interested Learners

PREREQUISITES : Signals and Systems

## Lectures

1. [Introduction to FOCT: Prerequisites, Course Content and Learning Outcomes](https://invisiblenetwork.ai/learn/nptel/108106167/9856018b2461) (YouTube)
2. [Communication through the ages](https://invisiblenetwork.ai/learn/nptel/108106167/7b2bd85716a8) (YouTube)
3. [Communication: Basics 1](https://invisiblenetwork.ai/learn/nptel/108106167/702fb242217d) (YouTube)
4. [Communication: Basics 2](https://invisiblenetwork.ai/learn/nptel/108106167/f488326479d9) (YouTube)
5. [Digital Communication for Optical Communication](https://invisiblenetwork.ai/learn/nptel/108106167/4080933b6e1b) (YouTube)
6. [Digital modulation: Basics 2](https://invisiblenetwork.ai/learn/nptel/108106167/957ae2d41f09) (YouTube)
7. [Digital modulation: Basics 3](https://invisiblenetwork.ai/learn/nptel/108106167/9efd291e15b9) (YouTube)
8. [Optical communication system](https://invisiblenetwork.ai/learn/nptel/108106167/38ecafe8370c) (YouTube)
9. [Optical Sources](https://invisiblenetwork.ai/learn/nptel/108106167/e786fe0464a3) (YouTube)
10. [Semiconductor gain media- structure, spectrum](https://invisiblenetwork.ai/learn/nptel/108106167/0f3541028e7c) (YouTube)
11. [Optical sources: LED](https://invisiblenetwork.ai/learn/nptel/108106167/a30b75692596) (YouTube)
12. [External Quantum Efficiency](https://invisiblenetwork.ai/learn/nptel/108106167/d9053a56c4be) (YouTube)
13. [Modulation Bandwidth of LED](https://invisiblenetwork.ai/learn/nptel/108106167/0ced163cf408) (YouTube)
14. [Optical and Electrical Bandwidth of LED](https://invisiblenetwork.ai/learn/nptel/108106167/6952b1b9a549) (YouTube)
15. [Emission Pattern of LED](https://invisiblenetwork.ai/learn/nptel/108106167/b6ab1696c675) (YouTube)
16. [Optical Sources: Laser Diodes over LEDs](https://invisiblenetwork.ai/learn/nptel/108106167/f9f5b6543af8) (YouTube)
17. [Laser Diodes: Resonator Concepts 1a](https://invisiblenetwork.ai/learn/nptel/108106167/33f644dba0e6) (YouTube)
18. [Laser Diodes: Resonator Concepts 1b](https://invisiblenetwork.ai/learn/nptel/108106167/713538ec7431) (YouTube)
19. [Laser Diodes: Resonator Concepts 1c](https://invisiblenetwork.ai/learn/nptel/108106167/c412cf2a6834) (YouTube)
20. [Laser Diodes: Gain Coefficient](https://invisiblenetwork.ai/learn/nptel/108106167/e6141c97e86d) (YouTube)
21. [Laser Diodes: Photon life time](https://invisiblenetwork.ai/learn/nptel/108106167/6015b0c0a7a3) (YouTube)
22. [Laser rate equation: Steady State solution1](https://invisiblenetwork.ai/learn/nptel/108106167/3d8e5e64636c) (YouTube)
23. [Laser rate equation: LI Chara](https://invisiblenetwork.ai/learn/nptel/108106167/54b05bccbfe0) (YouTube)
24. [Laser power derivation](https://invisiblenetwork.ai/learn/nptel/108106167/fb46b8a41036) (YouTube)
25. [Modulation Response of Laser 1](https://invisiblenetwork.ai/learn/nptel/108106167/f0b842f9c54c) (YouTube)
26. [Modulation Response of Laser 2](https://invisiblenetwork.ai/learn/nptel/108106167/def37bf73585) (YouTube)
27. [Modulation Response of Laser 3](https://invisiblenetwork.ai/learn/nptel/108106167/170fba913ac6) (YouTube)
28. [Setbacks of direct modulation of laser: Modulation Chirp](https://invisiblenetwork.ai/learn/nptel/108106167/d76799004c62) (YouTube)
29. [Setbacks of direct modulation of laser: Transcient Chirp](https://invisiblenetwork.ai/learn/nptel/108106167/84992e6b1fbb) (YouTube)
30. [Recap of Consequences of Direct Modulation](https://invisiblenetwork.ai/learn/nptel/108106167/f2b158ca7a6e) (YouTube)
31. [Noise in Lasers](https://invisiblenetwork.ai/learn/nptel/108106167/7b73603cfc5d) (YouTube)
32. [Relative Intensity Noise](https://invisiblenetwork.ai/learn/nptel/108106167/e57ca7060226) (YouTube)
33. [Laser Phase Noise 1](https://invisiblenetwork.ai/learn/nptel/108106167/1cdd7429aa62) (YouTube)
34. [Laser Phase Noise 2](https://invisiblenetwork.ai/learn/nptel/108106167/0f31b390b35b) (YouTube)
35. [Effect of Laser Phase Noise: A case study](https://invisiblenetwork.ai/learn/nptel/108106167/0ca63de4f89b) (YouTube)
36. [Electro-optic phase modulation](https://invisiblenetwork.ai/learn/nptel/108106167/86ed70926597) (YouTube)
37. [Electro-optic intensity modulator](https://invisiblenetwork.ai/learn/nptel/108106167/838164551cd8) (YouTube)
38. [Biasing of MZM: BPSK Generation](https://invisiblenetwork.ai/learn/nptel/108106167/95743007fecb) (YouTube)
39. [Biasing of MZM: QPSK and 16 QAM Generation](https://invisiblenetwork.ai/learn/nptel/108106167/71696238f91a) (YouTube)
40. [Line coding schemes and their bandwidth requirements](https://invisiblenetwork.ai/learn/nptel/108106167/9610a7f48059) (YouTube)
41. [Introduction to optical Fiber](https://invisiblenetwork.ai/learn/nptel/108106167/ec86b5d1b08a) (YouTube)
42. [Attenuation in optical fibers](https://invisiblenetwork.ai/learn/nptel/108106167/ffe5c763b061) (YouTube)
43. [Fiber Modes](https://invisiblenetwork.ai/learn/nptel/108106167/5dfcabb89d54) (YouTube)
44. [Modes of a step index fiber 1](https://invisiblenetwork.ai/learn/nptel/108106167/48e063e6cd73) (YouTube)
45. [Modes of a step index fiber 2](https://invisiblenetwork.ai/learn/nptel/108106167/1f145b9e6a3c) (YouTube)
46. [Modes of a step index fiber 3](https://invisiblenetwork.ai/learn/nptel/108106167/00bd8a6bce9a) (YouTube)
47. [Modes of a step index fiber 4](https://invisiblenetwork.ai/learn/nptel/108106167/1c4d87f98196) (YouTube)
48. [Modes of a step index fiber 5](https://invisiblenetwork.ai/learn/nptel/108106167/b6447918cea7) (YouTube)
49. [Modes and Cut-off conditions](https://invisiblenetwork.ai/learn/nptel/108106167/f029f4940a99) (YouTube)
50. [Universal b-V curves](https://invisiblenetwork.ai/learn/nptel/108106167/5f39682a1387) (YouTube)
51. [Modal Profiles in step index fiber](https://invisiblenetwork.ai/learn/nptel/108106167/228bea1691fd) (YouTube)
52. [Mode Field Diameter](https://invisiblenetwork.ai/learn/nptel/108106167/e05ae272762e) (YouTube)
53. [Dispersion- Intermodal dispersion derivation](https://invisiblenetwork.ai/learn/nptel/108106167/27b8b8fa8158) (YouTube)
54. [Dispersion-Bit rate distance Product](https://invisiblenetwork.ai/learn/nptel/108106167/5221b6777016) (YouTube)
55. [Phase Velocity and Group Velocity 1](https://invisiblenetwork.ai/learn/nptel/108106167/f50cc5f15fcb) (YouTube)
56. [Phase Velocity and Group Velocity 2](https://invisiblenetwork.ai/learn/nptel/108106167/006bb4b1d8d9) (YouTube)
57. [Material dispersion](https://invisiblenetwork.ai/learn/nptel/108106167/24da3eff74b8) (YouTube)
58. [Waveguide dispersion](https://invisiblenetwork.ai/learn/nptel/108106167/8d1f44f46882) (YouTube)
59. [Total Dispersion in optical fiber](https://invisiblenetwork.ai/learn/nptel/108106167/beb8d04356ff) (YouTube)
60. [Polarization mode dispersion](https://invisiblenetwork.ai/learn/nptel/108106167/c10c694c7088) (YouTube)
61. [Photodetectors concepts](https://invisiblenetwork.ai/learn/nptel/108106167/3ef1371099b2) (YouTube)
62. [p-n & p-i-n Photodetectors](https://invisiblenetwork.ai/learn/nptel/108106167/2aa62a4787af) (YouTube)
63. [Avalance Photodetector](https://invisiblenetwork.ai/learn/nptel/108106167/35e830db2c38) (YouTube)
64. [Direct detection receiver and sources of noise](https://invisiblenetwork.ai/learn/nptel/108106167/e853c0d886dd) (YouTube)
65. [Quantifying noises in direct detection receivers](https://invisiblenetwork.ai/learn/nptel/108106167/030110cc002d) (YouTube)
66. [SNR and Operation Regimes](https://invisiblenetwork.ai/learn/nptel/108106167/e76e8785000a) (YouTube)
67. [Noise Equivalent power and SNR in APDs](https://invisiblenetwork.ai/learn/nptel/108106167/651318fb2cd8) (YouTube)
68. [Coherent Receivers](https://invisiblenetwork.ai/learn/nptel/108106167/c03b95302b66) (YouTube)
69. [SNR analysis of coherent receivers](https://invisiblenetwork.ai/learn/nptel/108106167/9f228d8910b1) (YouTube)
70. [Performance Evaluation 1](https://invisiblenetwork.ai/learn/nptel/108106167/3859a9d5c8d2) (YouTube)
71. [Performance Evaluation 2](https://invisiblenetwork.ai/learn/nptel/108106167/3f176eab6624) (YouTube)
72. [Performance Metrics: BER,Q, and Receiver Sensitivity](https://invisiblenetwork.ai/learn/nptel/108106167/e59f0ad8bb66) (YouTube)
73. [Performance Metrics:Q and SNR](https://invisiblenetwork.ai/learn/nptel/108106167/b5e5ad13ac56) (YouTube)
74. [Quantum limit of photodetection](https://invisiblenetwork.ai/learn/nptel/108106167/7fa707f8ab20) (YouTube)
75. [Optical Amplifier](https://invisiblenetwork.ai/learn/nptel/108106167/34f481bfc53f) (YouTube)
76. [Erbium doped fiber amplifier 1](https://invisiblenetwork.ai/learn/nptel/108106167/a2fffc30a909) (YouTube)
77. [Erbium doped fiber amplifier 2](https://invisiblenetwork.ai/learn/nptel/108106167/fc875fbcee7b) (YouTube)
78. [Erbium doped fiber amplifier 3](https://invisiblenetwork.ai/learn/nptel/108106167/9817e001e342) (YouTube)
79. [Erbium doped fiber amplifier 4](https://invisiblenetwork.ai/learn/nptel/108106167/c10580fd9968) (YouTube)
80. [Link Design - Rise Time Budget](https://invisiblenetwork.ai/learn/nptel/108106167/c6d0387e31f6) (YouTube)
81. [Link Design- Case Study](https://invisiblenetwork.ai/learn/nptel/108106167/1fab7ed7cdcd) (YouTube)
82. [Link Design- Passive Optical Network and long haul link](https://invisiblenetwork.ai/learn/nptel/108106167/d36bb78d3a37) (YouTube)
83. [Dispersion - recap](https://invisiblenetwork.ai/learn/nptel/108106167/f190797430ff) (YouTube)
84. [Dispersion Compensation - Pulse Propagation with disperison](https://invisiblenetwork.ai/learn/nptel/108106167/8d95555c3b68) (YouTube)
85. [Pulse propagation -2](https://invisiblenetwork.ai/learn/nptel/108106167/9eae6a47fbcd) (YouTube)
86. [Dispersion Compensation -Dispersion Transfer Function](https://invisiblenetwork.ai/learn/nptel/108106167/9f7397c0e400) (YouTube)
87. [Dispersion Compensation -Case Study](https://invisiblenetwork.ai/learn/nptel/108106167/2e36bf873e1c) (YouTube)
88. [Dispersion COmpensation - WDM & DSP](https://invisiblenetwork.ai/learn/nptel/108106167/00d0bead4550) (YouTube)
89. [Nonlinear Effects- Nonlinear refractive Index](https://invisiblenetwork.ai/learn/nptel/108106167/64709a5852e0) (YouTube)
90. [Self Phase Modulation](https://invisiblenetwork.ai/learn/nptel/108106167/13989d439a10) (YouTube)
91. [Cross Phase Modulation](https://invisiblenetwork.ai/learn/nptel/108106167/5a05d9b75cd5) (YouTube)
92. [Scattering Processes in optical fibers](https://invisiblenetwork.ai/learn/nptel/108106167/dc7abb0a1eb3) (YouTube)
93. [Stimulated Brillouin Scattering](https://invisiblenetwork.ai/learn/nptel/108106167/0ad95f351c68) (YouTube)
94. [Stimulated Raman Scattering](https://invisiblenetwork.ai/learn/nptel/108106167/51e0317ab74a) (YouTube)
95. [Components- Directional Couplers](https://invisiblenetwork.ai/learn/nptel/108106167/8bb1137334af) (YouTube)
96. [Components - VOA, Polariser, Polarisation Controllers](https://invisiblenetwork.ai/learn/nptel/108106167/3e09ee2da413) (YouTube)
97. [Components- Isolator](https://invisiblenetwork.ai/learn/nptel/108106167/cd54d10ab472) (YouTube)
98. [Components - Circulator, Definitions](https://invisiblenetwork.ai/learn/nptel/108106167/134ea97bd3c7) (YouTube)
99. [Components - Wavelength filters](https://invisiblenetwork.ai/learn/nptel/108106167/7392b76a5e86) (YouTube)
100. [Components - Arrayed Waveguide Gratings, WSS](https://invisiblenetwork.ai/learn/nptel/108106167/a1639c1f10e9) (YouTube)
101. [Balanced Detection](https://invisiblenetwork.ai/learn/nptel/108106167/b3a547870555) (YouTube)
102. [Polarisation Diverse Coherent Receiver](https://invisiblenetwork.ai/learn/nptel/108106167/95b8b5ba4c03) (YouTube)
103. [Phase and Polarisation Diverse Coherent Reciever](https://invisiblenetwork.ai/learn/nptel/108106167/bf0106d4795e) (YouTube)
104. [Overview of impairments in coherent optical communication](https://invisiblenetwork.ai/learn/nptel/108106167/1c3435d449c0) (YouTube)
105. [Transceiver impairments - Generation and Compensation](https://invisiblenetwork.ai/learn/nptel/108106167/8a4f2f23f300) (YouTube)
106. [Channel Impairments - Generation and Compensation](https://invisiblenetwork.ai/learn/nptel/108106167/276840944398) (YouTube)
107. [Demo video](https://invisiblenetwork.ai/learn/nptel/108106167/0ceff58e0c69) (YouTube)
108. [Introduction to Optical Networks](https://invisiblenetwork.ai/learn/nptel/108106167/a24f05c65c1c) (YouTube)
109. [Layers of Optical Network](https://invisiblenetwork.ai/learn/nptel/108106167/a1b60935676a) (YouTube)
110. [SDH/SONET Layering, Frame Structure](https://invisiblenetwork.ai/learn/nptel/108106167/9ec610e57316) (YouTube)
111. [Physical Networks Topologies](https://invisiblenetwork.ai/learn/nptel/108106167/aa138479d3ef) (YouTube)
112. [Topology specific Link Design](https://invisiblenetwork.ai/learn/nptel/108106167/bf339d204b02) (YouTube)
113. [Network Protection](https://invisiblenetwork.ai/learn/nptel/108106167/c24a3afe7dea) (YouTube)
114. [Access Networks- PON](https://invisiblenetwork.ai/learn/nptel/108106167/ddace6e7cc49) (YouTube)
115. [Optical Interconnects, Data Centers](https://invisiblenetwork.ai/learn/nptel/108106167/78ccf6c1e35e) (YouTube)
116. [Optical communication for Wireless Fronthauling](https://invisiblenetwork.ai/learn/nptel/108106167/46ad4db410dd) (YouTube)