But how does a Laser actually work? (The Laser Principle) скачать в хорошем качестве

But how does a Laser actually work? (The Laser Principle)

First developed in the 1960s, lasers have become commonplace in industry and households for a variety of applications. But how do they actually work? In this video, I will provide an explanation on the laser principle. This video will brush over the Einstein coefficients, Fermi's Golden Rule and the properties and limitations of two level systems. In order to achieve population inversion, i.e. the precondition we need for a successful laser, we need at least a 3 level system. I will then explain why a 4 level system is actually the most efficient one. Feel free to like and subscribe! ⌚Timestamps: 00:00 Intro 00:22 Absorption, Spontaneous Emission, Stimulated Emission 02:08 Simplest Explanation 02:25 Einstein Coefficients 03:09 Fermi's Golden Rule 04:09 Population Inversion 04:35 Limitations of 2-Level Systems 05:33 3-Level System 06:49 4-Level System 🔔 Subscribe for new videos! https://bit.ly/3EKbfWp 🎵Music used in this video: Music by Vitamin - 03052021_ambient_114bpm - https://thmatc.co/?l=3E7D7B37 📬 CONTACT ME: I started this project as a hobby because I felt I had ideas and experiences I wanted to share. I would really appreciate feedback, so feel free to post a comment below and subscribe for new videos! 🔨 My Gear: My Camera: https://amzn.to/3OxZQxh Tripod: https://amzn.to/3rJxuXi Tripod Light: https://amzn.to/3xP9ea6 Apple USB-C Adapter: https://amzn.to/3KnhAs9 Editing Software: https://www.apple.com/final-cut-pro/