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  1. CurtisOliver

    Greetings from a Belgium based laser enthusiast

    Welcome to the forum. :) Nice intro btw. Also nice to see more European members
  2. CurtisOliver

    Are these just different names for the same type of laser?

    Laser diodes are typically +/- 5nm. So a 445, will usually be in anywhere between 440 to 450nm. They are the same technology but won't necessarily be the same laser diode. When it comes to diodes, they can only be taken to 1nm resolution when spectrographed. Diode wavelength also naturally...
  3. CurtisOliver

    Why are 473nm DPSS laser pointers so expensive?

    I recommend doing some more research into laser wavelengths. The fact that you didn't know any 473nm diodes existed, then why would you think they would be cheap? They obviously are not common. When things aren't commonly available, it is higher in market price. Different semiconductor materials...
  4. CurtisOliver

    Politics and General Debates Thread

    I'm no gun expert, but I do know that shooting yourself in a attempt of suicide is not foolproof.
  5. CurtisOliver

    Why are 473nm DPSS laser pointers so expensive?

    Yep, this ^^ Efficiency is important for cost per mW. Market demand and ability to be mass produced drives down cost considerably. If there was no market for DPSS 532's they would still be expensive too. Another thing to note is that common dpss pointers use stock crystals which have the...
  6. CurtisOliver

    LPF cannot advise on any applications that involve lasers being used on the human body. Using...

    LPF cannot advise on any applications that involve lasers being used on the human body. Using non-medical endorsed products by inexperienced operators has a huge potential for disaster.
  7. CurtisOliver

    Redefining the second

    The one that came closest to 'second' place!
  8. CurtisOliver

    Advice for Experiment with Budget

    Welcome Dylan, I'll answer each question in order. You are correct that shorter visible wavelengths are least absorbed by water, you could however still use a red and not notice any major effects as water is generally transparent to visible wavelengths. The absorption is most noticed once you...
  9. CurtisOliver

    Looking for yellow laser

    This is a different dpss process to that of typical 555/556nm lasers. Edit: It is still possible you may be correct on the crystal, just not the doping. Nd:YCOB exists, but I have seen a patent using Nd:YGG. I'm putting my bet more on Nd:YGG for the 555nm dpss. Correct pump wavelength.
  10. CurtisOliver

    Feeler: 10mW 589nm pointer

    They appear not to ship to EU countries which is a shame. Would have to use a relay service which is just an additional risk.
  11. CurtisOliver

    looking for a diode in the 0-400/700+ nm spectrum with the highest power in the form factor

    Neither is this guy. I also get a feeling we are being had.
  12. CurtisOliver

    Looking for yellow laser

    Interesting. So 545’s are neodymium doped and that 940nm pumped 575 seems like an experimental multiple doped crystal. Quite possible a co doping with praseodymium and another rare element.
  13. CurtisOliver

    Looking for yellow laser

    Nope it is not LiLuF4, well at least not as like in that thread as the pump wavelength is completely wrong. The pump is 976nm which automatically lends itself to praseodymium doped crystals (Pr:xxx) And as I just looked up Pr:LiLuF4 I can rule out known visible combinations in the yellow/green...
  14. CurtisOliver

    looking for a diode in the 0-400/700+ nm spectrum with the highest power in the form factor

    For me to feel comfortable with any suggestions, I would want to know what the strong desire is to own something so potentially dangerous and have it portable. NIR/IR part of spectrum would end up being far safer than anything suggested for the NUV/UV wavelengths.
  15. CurtisOliver

    Looking for yellow laser

    Cool. It’s always worth a shot. If they don’t then it’s back to speculation. But would be great to put this to rest.
  16. CurtisOliver

    Looking for yellow laser

    Sounds like they may produce the crystals directly themselves? Can you ask what Crystal they use? We could only speculate. It would be nice to put this to rest and would love to do more research into it. Might open up a rabbit hole
  17. CurtisOliver

    Researchers achieve world's first manipulation of antimatter by laser

    Would need high energy gamma photons for pair production.
  18. CurtisOliver

    Perpetual Motion Achieved, at Last

    Thanks just found one on Amazon. But will look at Kontax.
  19. CurtisOliver

    Perpetual Motion Achieved, at Last

    Those engines are a thing of beauty though, nice project to have one seeminglessy working and looking good.
  20. CurtisOliver

    Perpetual Motion Achieved, at Last

    We knew it was, but man you came across too serious. lol I was wondering if you actually believed it yourself. Good timing to finish it though




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