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0,1 and the power of light computing

Discussion in 'Science & Technology' started by GuavaSauce, Apr 11, 2012.

  1. GuavaSauce


    Mar 28, 2011
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    Tolleson, Az
    well, to start, im far from being a genious, or really even having much knowledge of what im about to start a discussion about, but i cant stop wondering about this and im not to sure on where to post it either. (this area looks good i guess)

    so, to start, lets look at yes or no. as in voltage present or not. each represents a 1 or 0 respectively when information is processed. originally, computers were meant to use the numbers 1-9, but regulating the discrete amounts of voltage to represent each was too much for the time. thus, 1 and 0 were used, and this simplified the issue enough to grow into what we have today. (correct me if im wrong please)

    now, with the advent of optic fiber and its uses, (thunderbolt is a great example), we're using the presence of light, or no light to send information over a medium, and its moving faster than electrons through a conductor. that is awesome, and i hope to see this replace the use of free flowing electron (electricity) in our next generation circuits.

    whats boggling me is what else can we do with light? what could we produce if instead of just using yes or no to compute a problem, we used white, green, blue, yellow, red, or any of the 278 trillion colors availible to us to compute? even on a simple scale of three colors (pick your own) how much further could we expand the compute environment? what could 5 colors provide? the ability to learn real time as humans do? we could see the use of the original variables 1-9 expressed as colors, moving faster (over distance) through a more full plane (if you will) rather than the two dimensional plane graph of 1 or 0.

    granted, the ability to create the light would still be somewhat limited by the speed of flowing electrons through a LED (or whatever comes next) but the base of the coversation i would like to start here is where are we going, what can we imagine doing with it, and is this possibley more feasable than a bio engineered circuit? (something simular to our human body, which is another discussion i would like to start later)
  2. lilhasselhoffer

    Apr 2, 2011
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    Let me get this out of the way first, but please continue reading. You are missing the point of why we use a binary system for computing, and have a fundamental misunderstanding of light based computations.

    The reason that we use binary is that a stable voltage is nearly impossible in the computing world. Variations in wire length, heat expansion, material, and a handful of others contribute to variation in voltages. Considering that you are looking to system to create 10 discrete states, the voltages required would be immense. As most components could not reliably produce these large difference, it was necessary to have less discrete values. To make things simple, a binary based math system was implemented. A part could read a 0 from no voltage to four volts, and a 1 for anything above four volts. The problem of variation in voltages was thereby resolved, but computing was forced to use a binary system. This is not a loss to computers, but makes it more difficult for base 10 thinkers to comprehend the information.

    Light computing can use multiple wavelengths, visually differentiated by their color. This is the exact same theory as a standard electronic cable uses. Cat5 wire utilizes four pairs of conductors (8 total wires) to send and received data. Light can use the same technique, but the barrier to using this is the high cost of laser diodes and the substantial chemical composition differences required to produce each type of laser. Here again, the theory isn't new, and is already in use.

    What is being forgotten is the fact that data has to be stored. Whether it be on an SSD, HDD, RAM, or ROM data storage is structured only as a collection of 1s and 0s. Even if communication protocols were amazingly quick, the data transferred will be limited by the storage media. SSDs may saturate a Gigabit ethernet connection, but trusty old mechanical drives are where my home network fails. Basically, you're asking for a car to be able to travel at 200kph, in an area where the speed limit is 50 kph. Extra speed is communication might be useful to computer clusters, but the average user won't be able to find a use.

    Perhaps if internet providers used this kind of connection (some use fiber optic cables, but not in this way) it might make sense, but the costs would be astronomical.
    Inceptor says thanks.
  3. theoneandonlymrk


    Mar 10, 2010
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    Manchester uk
    i just typed for hours and it got off (disapeared on accepting something os related) tut damn explorer, again

    you should look up transistor design as it is this that determined the binary thing initially ,as processors are massive arrays of these, processors can use alternate languages to binary now though

    massive arrays of volt regulators and measureing elements would be impossible to manufature id imagine anyway and yes i know a trnsistor IS a volt regulator but they are not used for that in cpu,s their used as a state switch

    you do raise some good points, and IBM and intel (id imagine) pretty much have optical chip interconnects figured out and nearing volume production but optical chips themselfs are still in the first stages of developement afaik ie they are still trying to work out materials for optical transistors and even how they will work so an all opto chip is some ways off, and might not be the One anyway what with quantum computers and other tech

    as id imagine a quatum computer would run crysis much better then an optochip:)

    wtf , whys my post before turned back up
    Crunching for Team TPU
  4. Steevo


    Nov 4, 2005
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    That may have been what WAS the case in early transistors, but we now use multiple states of electrical energy to transfer data, the most known being QAM, or PKS, and multiple states thereof.

    Plus newer GDDR5 standards allow for retraining and jitter control per channel/link.

    We could move to a multistate, however all of your compilers, hardware, essentially everything is made to run binary as it is a true and purest form of computation, and the simplest answer, yes or no, on or off.

    The next fastest thing would be optical transistors with color filter gates so one lead could carry the instruction data for a set of transistors and allow the output of multiple at once.
    Inceptor says thanks.
    10 Year Member at TPU 10 Million points folded for TPU

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