1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Laser intensity vs materials

  1. Nov 28, 2012 #1
    There are materials which block laser beams (or light globally) or weaken its intensity via shading i.e. a beam must have crossed a specific energy barrier in order to pass this shading where beams with less energy will fade and won't pass. The question is, is there a material or a type of shading which does the opposite? Meaning that it blocks beams with intensities higher than a specific barrier and allows those with less intensities (behaving like a low pass filter somehow), does this type of material exist?!
     
  2. jcsd
  3. Nov 28, 2012 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Are you thinking about nonlinear effects like saturation here?

    I see an obvious issue for the opposite effect: If you weaken your high-intensity beam with some nonlinear effect, it becomes a low-intensity beam after a while (as no interaction will be point-like) and could pass.
    Multi-photon processes depend on the beam intensity, but a beam with a higher intensity will keep a higher intensity, even if it is weakened more than a low-intensity beam.
     
  4. Nov 28, 2012 #3
    Is this a question about scifi shields? You can see though it, but it blocks laser?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Laser intensity vs materials
Loading...