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      CommentAuthorTrim
    • CommentTimeOct 13th 2016
     
    Be careful of your backdoor, entry is always possible by strangers.
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    • CommentAuthorLakes
    • CommentTimeOct 13th 2016
     
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      CommentAuthorTrim
    • CommentTimeOct 19th 2016
     
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    - What's the capital city of Britain?
    "Maybe London. Maybe not. But not both. Maybe"
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      CommentAuthorTrim
    • CommentTimeOct 19th 2016
     
    Colchester.
    • CommentAuthortinker
    • CommentTimeOct 19th 2016
     
    Romford.
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      CommentAuthorTrim
    • CommentTimeOct 20th 2016
     
    NBF

    3-D wiring technique is progress to scalable quantum computers.

    http://www.nextbigfuture.com/2016/10/3-d-wiring-technique-is-progress-to.html
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      CommentAuthorAngus
    • CommentTimeOct 20th 2016
     
    Good practical stuff. Hooray for Mike Lazaridis for creating the IQC. Blackberry profits at work.

    It reminds me of the nitty gritty issues we faced around inventing a practical connector for SM optical fibres, and then getting it standardised.
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    If that was you, well done. I did some work on FDDI with National and learned to splice fibre. It's tricky stuff.
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      CommentAuthorAngus
    • CommentTimeOct 20th 2016
     
    Splicing is another matter than connectors, of course. I assume you were using a splicing jig with built in microscope and automated alignment and a plasma torch to do the weld automatically.

    Back in the day we used a propane torch and did it by hand. Now THAT was tricky.

    My good buddy Brian who invented the fibre taper coupler used to TAPER fibres by hand like that.
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    Way beyond what I learned on that course. That was cutting and hooking up a connector.
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      CommentAuthorAngus
    • CommentTimeOct 20th 2016
     
    Oh right. Clean off the fibre, glue it in the mandrel, polish the end. You're right - it's tricky.

    When you think of the mechanical challenge, it's pretty amazing. The fibre cores are 9 micron diameter. If you want a low reflection, high transmission joint you have to align them to better than a micron. All that by some method that a guy can use up a pole in a rainstorm.

    I was skeptical we would ever find a way. The key was to be able to mass produce those ceramic mandrels with the holes aligned to the outside to that tolerance.
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    To be honest it went in one ear and out the other. I chiefly remember the pain of being accidentally stuck by the fibre. Soldering I do still know because I started at age 9. This was age 40 and I never once used the technique outside the class anyway, since I was designing software architectures and drivers.
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      CommentAuthorAngus
    • CommentTimeOct 20th 2016
     
    Posted By: Andrew PalfreymanI chiefly remember the pain of being accidentally stuck by the fibre.


    Ha! Yes.
    Try it when it's carrying ten watts. Just sizzles right in like a hot knife through icecream.
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    Euw! I never was lasered at that level - never mind subcutaneously. But I do know, like any radio ham, that an RF burn is a nasty, nasty thing.
    • CommentAuthorAsterix
    • CommentTimeOct 21st 2016
     
    Try picking up a 100W soldering iron by the wrong end.
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      CommentAuthorTrim
    • CommentTimeOct 21st 2016
     
    With your teeth. As long as it is cold.
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      CommentAuthorAngus
    • CommentTimeOct 21st 2016 edited
     
    Posted By: AsterixTry picking up a 100W soldering iron by the wrong end.


    Ugh. We've all done it or come close enough to hurt.

    Actually I'll take the little black cauterised laser sliver any time.
    • CommentAuthorAsterix
    • CommentTimeOct 21st 2016 edited
     
    I work quite a bit with an acetylene (but not oxy-) torch on sheet metal. One thing you learn right off is that if something's going to fall, let it. Same goes for boiling hot stuff in the kitchen.

    Lesson 2: Don't assume that something isn't hot if it's not glowing.