Error in the text: 1000mW laser with 532nm wavelength which is green light.

1000nm light is infrared.

  • BigDanishGuy@sh.itjust.worksEnglish
    24·
    12 days ago

    Suitable applications of 1w lasers

    • light engraving
    • ultra light cutting
    • mischief and miscellaneous shenanigans
    • medical (I guess it’s in the range for tattoo removal, but power rating for these lasers are stated weirdly)
    • fiber optic communications

    Tasks 1w lasers are unsuitable for

    • any kind of pointing, besides cases where you wish to permanently damage your audience.

    As I recall the cheap lasers have an issue with the quality of their wavelength. Both in contamination and precision. Which leads glasses not being effective.

    • kivihiili@lemmy.blahaj.zoneEnglish
      7·
      12 days ago

      medical (I guess it’s in the range for tattoo removal, but power rating for these lasers are stated weirdly)

      for those curious (you probably know this though), lots of these are pulsed, primarily to avoid excessive local heating (burning) of the tissue being lased. these can have peak powers in the kilowatt range!

      watts are energy (in joules) divided by time (in seconds), and while relating energy to time is helpful for constant-power applications—and even some certain pulsed applications—the timeframe here is often small to the point of not mattering much, and a direct measure of the total energy delivered is ultimately most useful. nonetheless they are very impressive sounding and goofy, like “oh i work with multi-KILOwatt lasers on the daily :3” hehe

      any kind of pointing, besides cases where you wish to permanently damage your audience.

      for a single one watt beam of light, absolutely! do not bring those to the school show-and-tell. but there are absolutely lasers this (or even more) powerful used in concert settings and so forth. still, you’re very right, care must be taken with them too.

      also your point of output contamination is spot on! +1 to avoiding cheap “powerful” lasers :)

      • BigDanishGuy@sh.itjust.worksEnglish
        4·
        12 days ago

        lots of these are pulsed, primarily to avoid excessive local heating (burning) of the tissue being lased. these can have peak powers in the kilowatt range!

        I just wrote “weird” because trying to explain 250mJ delivered in 15ns became too much math to put into a comment I wanted people to read.

        also your point of output contamination is spot on! +1 to avoiding cheap “powerful” lasers :)

        That’s what fucking around finds out for you. Luckily I never got to the stage in my project where I put on my budget non-certified goggles, and powered on el cheapo laser diode. But if I can help somebody else to not trust the nominal values, then I’ll chime in when this is brought up.

      • BigDanishGuy@sh.itjust.worksEnglish
        3·
        11 days ago

        Honestly, I’ve got no idea what price range is plausible these days. What I do know is, that I would only buy from someone who knows what they’re doing, and who can provide a proper datasheet. But then again I come at this from an electronics angle, so I’d want a datasheet with stats on the beam, like wavelength composition, and heat dissipation etc, and not just forward voltage and current.

        If you’re looking to buy a finished product, then figure out what regulatory markings it should have, like UL, CSA, CE, and TÜV. Personally I may be European, but I wouldn’t be satisfied with a CE marking, it must at least have TÜV before I’d mess with it, and I’d prefer it to be UL listed as well. Anybody can slap CE on a product, but UL and TÜV are actual testing institutions.