Video Description

Episode 63 #laser #electronicscreators What happens when you reflect a Laser beam back on itself? This unusual Laser system from a Particle Counter does exactly that! Why? how does it work? Let's find out! Sams Laser FAQ The PMS/REO External Resonator Particle Counter HeNe Laser https://www.repairfaq.org/sam/laserhen.htm#henish7 External Passive Cavity Laser patent: https://patents.google.com/patent/US4594715A/en Previous teardown of the Laser Particle counter: https://m.youtube.com/watch?v=oUM1OD_WWgM Check out my other videos: https://www.youtube.com/leslaboratory​ Please don't forget to like, subscribe and comment for more great content! If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: https://patreon.com/leslaboratory Or donate directly: https://paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps the channel! 0:00 Intro 0:12 Helium Neon Lasers! 0:53 Brewster Window Laser 1:46 Unusual Particle Counter Laser 2:44 Sam's Laser FAQ 4:02 Patent External Stabilized Passive Cavity 8:25 Laser Teardown 9:05 Optical Bench Setup 9:45 Laser Demo 12:43 Credits