# Introduction to LASER

- Institution: IIT Delhi
- Department: Physics
- Teacher: Prof. M R Shenoy
- Level: Undergraduate
- Language: English
- Subjects: Physics
- Source: [NPTEL](https://nptel.ac.in/courses/115102124)
- Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.)
- Syllabus: [at the source](https://nptel.ac.in/courses/115102124)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

## Lectures

1. [General Introduction, Scope and Contents](https://invisiblenetwork.ai/learn/nptel/115102124/aaee957a0531) (Video)
2. [Interaction of Radiation with Matter](https://invisiblenetwork.ai/learn/nptel/115102124/c22ca994bcf2) (Video)
3. [The Einstein Coefficients](https://invisiblenetwork.ai/learn/nptel/115102124/417b016d63b0) (Video)
4. [Atomic Lineshape Function, g(ν)](https://invisiblenetwork.ai/learn/nptel/115102124/c2bf229c4ffc) (Video)
5. [Amplification by Stimulated Emission](https://invisiblenetwork.ai/learn/nptel/115102124/b434aebcbcb6) (Video)
6. [Line Broadening Mechanisms](https://invisiblenetwork.ai/learn/nptel/115102124/f8b5216f282e) (Video)
7. [Line Broadening Mechanisms - 2](https://invisiblenetwork.ai/learn/nptel/115102124/650bee81265f) (Video)
8. [Laser Rate Equations: 2-Level System](https://invisiblenetwork.ai/learn/nptel/115102124/51c60fd6f2c8) (Video)
9. [Laser Rate Equations: 3-Level System](https://invisiblenetwork.ai/learn/nptel/115102124/99e12ecc7d9e) (Video)
10. [Laser Rate Equations: 4-Level System](https://invisiblenetwork.ai/learn/nptel/115102124/fb64617fcb58) (Video)
11. [Laser Amplifiers](https://invisiblenetwork.ai/learn/nptel/115102124/171455dc0982) (Video)
12. [Er-Doped Fiber Amplifier](https://invisiblenetwork.ai/learn/nptel/115102124/8af4f4451aa8) (Video)
13. [Resonance Frequencies](https://invisiblenetwork.ai/learn/nptel/115102124/0549d8486dd2) (Video)
14. [Spectral Response of an Optical Resonator](https://invisiblenetwork.ai/learn/nptel/115102124/625cf6d49302) (Video)
15. [Resonator Loss and Cavity Lifetime](https://invisiblenetwork.ai/learn/nptel/115102124/d933ec14cef4) (Video)
16. [Spherical Mirror Resonators](https://invisiblenetwork.ai/learn/nptel/115102124/ec7f31c5d415) (Video)
17. [Resonator Stability Condition](https://invisiblenetwork.ai/learn/nptel/115102124/243d76ab4653) (Video)
18. [Ray Paths in Spherical Mirror Resonators](https://invisiblenetwork.ai/learn/nptel/115102124/fef549d7f654) (Video)
19. [Tranverse Modes of a Spherical Mirror Resonator](https://invisiblenetwork.ai/learn/nptel/115102124/84ae6165a358) (Video)
20. [Gaussian Mode of the Spherical Mirror Resonator](https://invisiblenetwork.ai/learn/nptel/115102124/96a39979a03c) (Video)
21. [Longitudinal Modes of a Spherical Mirror Resonator](https://invisiblenetwork.ai/learn/nptel/115102124/0db6ea38d76e) (Video)
22. [Laser Oscillations & The Threshold Condition](https://invisiblenetwork.ai/learn/nptel/115102124/6d942bd97a0e) (Video)
23. [Spectral Hole Burning](https://invisiblenetwork.ai/learn/nptel/115102124/a902c08707a1) (Video)
24. [Variation of Laser Power around Threshold](https://invisiblenetwork.ai/learn/nptel/115102124/8235300e93e8) (Video)
25. [Optimum Output Coupling](https://invisiblenetwork.ai/learn/nptel/115102124/1e9d94346312) (Video)
26. [Laser Output Characteristics](https://invisiblenetwork.ai/learn/nptel/115102124/1c124f89cf49) (Video)
27. [Laser Beam Properties](https://invisiblenetwork.ai/learn/nptel/115102124/b1cdc83ab054) (Video)
28. [Ultimate Linewidth of a Laser](https://invisiblenetwork.ai/learn/nptel/115102124/1cb64289fc09) (Video)
29. [Pulsed Lasers](https://invisiblenetwork.ai/learn/nptel/115102124/71f82278f1ef) (Video)
30. [Q-Switching](https://invisiblenetwork.ai/learn/nptel/115102124/2d59ba02417f) (Video)
31. [Mode Locking](https://invisiblenetwork.ai/learn/nptel/115102124/ba0e8226204a) (Video)
32. [Methods of Mode Locking](https://invisiblenetwork.ai/learn/nptel/115102124/2f3f75dbdbd6) (Video)
33. [Some Common Lasers](https://invisiblenetwork.ai/learn/nptel/115102124/7e258c1cc6b2) (Video)
34. [Fiber Lasers](https://invisiblenetwork.ai/learn/nptel/115102124/2648052a1bd0) (Video)
35. [Semiconductor Lasers](https://invisiblenetwork.ai/learn/nptel/115102124/2a7544ccf803) (Video)
36. [Lasers and Laser Amplifiers in Optical Fiber Communication](https://invisiblenetwork.ai/learn/nptel/115102124/45e7d0b56a0d) (Video)
37. [Lasers in Nonlinear Optics](https://invisiblenetwork.ai/learn/nptel/115102124/99509d7eaf18) (Video)
38. [Laser Safety](https://invisiblenetwork.ai/learn/nptel/115102124/c25bd202df4c) (Video)