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How Laser Diodes Work – The Learning Circuit

How Laser Diodes Work – The Learning Circuit



In this The Learning Circuit lesson, Karen teaches about laser diodes. She begins by explaining how a standard PN diode works. However, laser diodes are PIN …

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In this The Learning Circuit lesson, Karen teaches about laser diodes. She begins by explaining how a standard PN diode works. However, laser diodes are PIN …

electronics,hardware,hacking,mods,weekly,element14,maker,engineering,element14presents,Laser,Diode,Lens,Pn diode,Pin diode,Intrinsic,P-type,N-type,Beam,Collimation,Depletion zone,Semiconductor,Coherence,Wavelength

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Comments

41 responses to “How Laser Diodes Work – The Learning Circuit”

  1. elxde Avatar
    elxde

    6:09 a death weapon that will help me violate the geneva conventions and the treaty of versailles

  2. Robert Brown Avatar
    Robert Brown

    I had more than 5 experiences of my laser diodes becoming suddenly dim due to circuit boards over driven my diodes

  3. Robert Brown Avatar
    Robert Brown

    I have a Nichia NDG7475 1 watt 520nm green laser diode

  4. Nani Nano Avatar
    Nani Nano

    5:55 video game controllers? you know that thing doesn't use lasers right?

  5. Alex Jay Brady Avatar
    Alex Jay Brady

    thanks!

  6. Jonathan Taylor Avatar
    Jonathan Taylor

    Great video

  7. ywk Avatar
    ywk

    Thank you for the video is the biggest difference between laser diode and an LED that it has a polished mirroring layer? and what would this be made of in material perspective??

  8. Artjoms Pugacovs Avatar
    Artjoms Pugacovs

    How laser work is covered here only 1 minute.
    Also not well explained.

  9. giuseppe danieli Avatar
    giuseppe danieli

    I use 450 mn laser for engrave/print a lot of things, actualy with FAC tecnology and double beam can easy cut plywood. But the big problem is how extract heat from the module 'cos the fan isn't enought. Any suggestion?

  10. Touheed Avatar
    Touheed

    Bhaot acha vidio hai??? knowledge wala

  11. Jeremiah Bullfrog Avatar
    Jeremiah Bullfrog

    Blink response would be good to mention. Outside of visible light the eyes won't close and the retinas will just burn. Good video!

  12. P.A A Avatar
    P.A A

    4:27 so of course no one should build a robot to shine it directly to the eye

  13. zhou yang Avatar
    zhou yang

    thanks

  14. Ettore Frigo Avatar
    Ettore Frigo

    Ho fatto una stupida scoperta nel 1977 da bambino 12 enne, da un semplice (chiodo) OA85 un diodo a baffo di gatto al (anodo) tungsteno e germanio saldato sul reoforo con lo stagno che è il catodo, che alimentandolo a 9V inversamente si è illuminato come una lampadina da 75 W, tutto racchiuso da un cilindro in vetro, al confronto dei LED del 1962 si mostravano pallidi fatti con silicio drogato con arsenico e gallio e contatti e substratto in argento o oro e ora in alluminio che fa da specchio e la capsula fa da lente plastica anti riciclo, la cosa divertente 🙁 e che nel 2010 gli scienziati scoprano il silicio e germanio drogati di stagno si illumina meglio e si fanno pure i migliori LASER a diodi a semiconduttori e si abbattono pure costi e inquinamento, fatta presente questa bella notizia del 1977 ben 44 anni dopo, non sanno che rispondere se hai la laurea al Faggin o al Oliver Twist.

  15. Rami Barakat Avatar
    Rami Barakat

    thank you very much. now I know how they work, but can anyone explain how they are made ( manufacturing process) ? I dont get how they make the mirrors in between the junctions, I cant find a satisfactory explanation.

  16. JudgeFredd Avatar
    JudgeFredd

    Nice explanations – thank you

  17. Gaurav Gupta Avatar
    Gaurav Gupta

    Thank you mam

  18. Alfred Kasereka sivanzire Avatar
    Alfred Kasereka sivanzire

    Sorry to ask you something different: My project consist of a blanket with température sensor, heartbeat sensor and alarm to avoid death by malaria. Sometimes babies die in bed by malaria, temperature rises nobody will notice. Which sensor to use? In blanket, on socks or in mattress?

  19. Pendragon Avatar
    Pendragon

    Suuuuuper amazing video! subbed!

  20. Zener Stanfill Avatar
    Zener Stanfill

    Great Explanation.

  21. inprogress Avatar
    inprogress

    Thank you for the laser tutorial, karen and Merry Christmas. I noticed that you mentioned how you would like to see what type of project everyone else is going to come up with; so does that mean that I won't see an upcoming "laser" focused project from you?

  22. Mario G. Cardiel Avatar
    Mario G. Cardiel

    Merry Christmas, Karen! And thanks for the video!

  23. Sree Kumar Avatar
    Sree Kumar

    Thanks.

  24. philosoaper Avatar
    philosoaper

    a laser should NEVER be used as a "pet toy"

  25. K. C. Avatar
    K. C.

    Sooo nice!

  26. TheRealEngineer Avatar
    TheRealEngineer

    Unlike most Karens, this one is cool ?

  27. 1234 Avatar
    1234

    i've found here information that i didn't know after 4 years studying laser technology…

  28. JamesODell Avatar
    JamesODell

    Very good information. Nicely done

  29. Dr.xxx Avatar
    Dr.xxx

    Super video!

  30. ValsoRay Avatar
    ValsoRay

    5:55 Nintendo zapper didn't use LASER !

  31. Alfred Kasereka sivanzire Avatar
    Alfred Kasereka sivanzire

    We can count items on a conveyor belt by laser and a photosensitive surface perpendicular to the laser beam.

  32. Vyl Bird Avatar
    Vyl Bird

    Most laser printers now use LEDs, not lasers. They used to use lasers, but advancements in LED manufacture allowed cheaper LED arrays to perform the same task. By that point though, the name had stuck – laser printers had come to be seen as an indicator of of quality and reliability, so no manufacturer would want to brand their printers as not-laser. They just carried on calling them laser printers even after the laser was removed.

  33. وافي الله شفيع Avatar
    وافي الله شفيع

    So much information
    Thank you

  34. Arnel Condino Avatar
    Arnel Condino

    Hi Karen merry Christmas

  35. Malko Gindrat Avatar
    Malko Gindrat

    Thanks. Nice video. Quick, concise and very informative.

  36. Viet Dang Avatar
    Viet Dang

    Hello Karen,
    Thank you so much and the team for those contents.
    Enabling so many educational path for younger tinkerer.
    Sometimes i believe, because of the opensource thoughts in the community, we build a future of small heroes, who are building the gears for medicin, bakers, schools or science.
    Electric Engineering is a major to understand more deeply our creational cause rather intriguied conspiracy ideologies.
    In the head is not in the hand, and nature is providing us with so much variety of projects.
    For Example freaking lasers!!
    Projects for people, Projects with people or Projects be creative! 🙂

    Have a wonderful and healthy Christmas!
    Thank you element14!

    Best Greetings from Germany
    Viet

  37. Todd Marshall Avatar
    Todd Marshall

    How long will it be before people realize "photons" don't exist?

  38. Jane Leila Avatar
    Jane Leila

    Nice 36:14 ????

  39. DAVID GREGORY KERR Avatar
    DAVID GREGORY KERR

    Just one thing if you are going to be working with these devices then please wear a welding helmet with the visor down if you value your eyes and your friends don't point the device at them also.

  40. MAYER MAKES Avatar
    MAYER MAKES

    Frigging laaaasssserd

  41. Hot Girls Video XXX Avatar
    Hot Girls Video XXX

    30:27 Anyone want to do this with me?? ??♥️❤️

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