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!

Full Optical Adder

  1. Apr 7, 2015 #1
    If we use 2 lasers with selectable light intensities as input, with each level of intensity corresponding to decimal number.
    Like
    level 0 intensity - decimal 0 (MIN)
    level 1 intensity - decimal 1
    level 2 intensity - decimal 2
    ...
    level 9 intensity - decimal 9 (MAX)

    and directly shine both of them over photo detector, there intensities will add up to produce sum. thus we can measure the current from photo detector to see what number is it.
    we can also use laser of other frequencies to implement parallelism.

    I know this solution is simple but I don't get it why wont it work either.
     
  2. jcsd
  3. Apr 7, 2015 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    The photodetector is not optical, you have to extract an electronic signal from it.
     
  4. Apr 7, 2015 #3
    So they also want detector to be fully optical, that means output to be pure light and that means all optical memory with read and write capabilities.
    That thing would be difficult to make.
     
  5. Apr 8, 2015 #4

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Who is "they"? Fully optical elements would allow some things to be faster in some specialized systems.
     
  6. Apr 8, 2015 #5
    they means the scientists. One question though what is the bone of contention in realizing full optical computing ?
    is it the material which is lacking to manipulate light with light. from what I have googled most say it is the material, while these things (optical transistor, the read/write capable memory, the all optical amplifiers, optical buffers) have already been demonstrated.
     
  7. Apr 9, 2015 #6

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    All those things rely on manipulating light with light in some way.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Full Optical Adder
Loading...