Help Needed: splitting up optical data
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N.B. This is not a question about splitting up white light- I've done GCSE optics and I'm fine with that.
The Problem
I have this save where there is a qwerty keyboard controlling a pair of fiber optic lasers, and when the lasers have fired in a sequence that corresponds to the letter, the streams with the particular colours are merged into one optical path. The merging works fine, but the plitting is getting very tricky. The critical angles of all phot are the same but due to the way it is combined the two streams containg photons (each with pattern photon- spacex3 -photon and so on) and the two streams mix so that they are one space out of phase. This means that as they leave the fibre the streams bounce to different directions depending wheter they came from the top or bottom laser.The way I hve to fix this is to work out an arrangement where the two data streams are split ( easy) and then broken down with glass to go to pscn/nscn detectors so that each of the 26 different outputs are represented (hard)- the problem comes from being able to have more than one beam per detector and beams from to laser hitting detectors from bottom laser.
The Goal
Sort the problem and get a fiber optic communicaions system that can combine two data streams working by adding a readout at the other end fed by the detectors.More info in the save
1563458View Save 1563458Thanks in advance for any help rendered, I will gladly clarify any issue you may have.
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I'm not 100% sure of what you mean... but here is something that will detect the different colors of the laser using GLAS.... Full credit to user:Catelite for the detector.
1563607View Save 1563607 -
Reliably split them, I can split them, but not reliably- for starters I have skipped wavelegneth bands if they are too close to the last one because of them not being easy to split.
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Aaaah, I see what you mean now. Let me make it real quick.
EDIT: Hmm, it depends what you want. I've found a way to split it with PIPE, but a lot of the photons are lost since it spews in random directions. However, if you just want to detect the color, the remaining photons will set off the detector. I don't really know the mechanics of PIPE that well, so if there is a better way to control the direction they exit the pipe, let me know.
Edited once by dom2mom. Last: 17th Jun 2014 -
You might be able to do it by using the way particles can sometimes skip over a 1 pixel thick barrier, if it's placed correctly.
This seems to work for me:
1563765View Save 1563765Top stream gets reflected upwards, bottom stream carries straight on past the reflector.
Edited once by jacksonmj. Last: 17th Jun 2014 -
This seems to work perfectly. I didn't think of that. I'll hook it up to the detector and see if that's what he's looking for.
EDIT: It seems to work perfectly. Great idea.
1563909View Save 1563909Edited once by dom2mom. Last: 17th Jun 2014 -
Incidentally, you can also read the colour of a photon using a combination of DTEC, various FILT modes, and PSCN+NSCN, which can be more compact than a prism. Example:
1408215View Save 1408215Edited once by jacksonmj. Last: 17th Jun 2014 -
I am aware of that, but thought it a little cheaty, otherwise I would have also fiddled with the filter tmps in the laser to make combined colours and reduced the number of channels needed to one. The problem was also due to beams from different lasers sharing the same detectors, which I wanted to solve first. By designating a detector for one wavelecght you don't solve the problem but create a new one and ignore it.
Are those not the parts from the filt thermometer- I was trying not to copy it.
Thanks both of you for your suggestions, and I will certainly take them under advisement, I have a couple more options that I would like to explore first but I may very well use them to a more than modest extent.
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Yes, that's why I said credit to catelite. If you don't want to use, sure. It's just that you were describing glass specifically detecting the color, so I just remebered this and used it.
