How Lasers Work

Подробнее о видео

Simplified explanation of laser physics principles: atomic energy levels, spontaneous and stimulated emission, gain, three- and four-level schemes. Also explained are various types of laser: ruby, Neodymium, Helium-Neon, Semiconductor/Diode, Capillary Discharge and Free Electron Lasers.

Contents
00:00 - Introduction
02:04 - Atomic processes
04:54 - Laser gain
06:43 - CW and Q-switching
09:14 - Population inversion
13:12 - Ruby, Neodymium
14:24 - HeNe
15:00 - Diode lasers
17:00 - Unconventional
18:27 - Free Electron
19:47 - LWI
20:33 - Summary

References
[1] “Raman spectroscopy has shed light on the structure of difficult to analyse sulphur-rich polymers”, Central Laser Facility

[2] 3D animation of the Rutherford atom (User: Damek)

[3] Y. Diouf et al., “Numerical Study of Density Functional Theory of Multi-electronic Atoms: Case of Carbon and Helium”, American Journal of Nanomaterials 9, 12 (2021).
[4] Xenon Flashtube by Nathan Boor (User: NapoleonoftheNow)

[5] S. Hooker and C. E. Webb, “Laser Physics”, (OUP 2010). ISBN: 978-0198506928
[6] Black Marble 2016, NASA's Goddard Space Flight Center

[7] 3D cut of the LHC dipole, CERN, OPEN-PHO-ACCEL-2014-003-8

[8] L. Yuan et al., “Transient lasing without inversion via forbidden and virtual transitions”, Physical Review A 89, 013814 (2014).