Helium-Neon Lasers Are Surprisingly Useful For Physics Experiments! скачать в хорошем качестве

Helium-Neon Lasers Are Surprisingly Useful For Physics Experiments!

In this video, I take a closer look at a couple of helium–neon (HeNe) lasers that I salvaged from medical diagnostic equipment at the scrapyard, over ten years ago. I don’t have a deep background in laser systems, so this is very much an exploratory teardown and learning exercise. I remove one of the lasers from its housing to identify what type of power supply is required to safely operate it, and to better understand how these lasers are constructed. Along the way, I discuss why helium–neon lasers are often preferred for physics experiments, metrology, and alignment work when compared to other laser types such as CO₂ lasers and diode lasers. Topics touched on include beam quality, coherence, wavelength stability, and why HeNe lasers continue to be useful despite their age. This is not a how-to guide or a complete setup — it’s an initial investigation into salvaged laser hardware, with the goal of learning what I’ve got, how it works, and whether it can be useful for future experiments. As always, salvaged equipment can be unpredictable, and high voltages are involved, so this is done carefully and with appropriate research and safety precautions. If you’ve worked with HeNe lasers before, feel free to leave a comment — I’m always keen to learn from people with more experience. Thanks for watching.