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[extremetech] DARPA creates hollow-core optical fiber for faster networks, more accurate sensors - Page 2

post #11 of 19
Can they even call it fiber then, since there isnt any glass fiber in the cable? so it would just be an optic cable? air-optic cable? (maybe i should copyright the name now? rolleyes.gif ) i wonder how long it will take them to make an optical cable that has a vacuum inside it (would allow light to travel at 100% speed of light)
post #12 of 19
Quote:
Originally Posted by Vrait View Post

Can't wait for the day with no real lag in online games. 150 ping is annoying!

That sounds more like a crappy ISP or something.

My ping usually ranges from 30-70ms when playing online games, without shutting off my torrent client.

Unless you're talking about gaming with international friends...
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post #13 of 19
yea 150ms ping is pretty bad, i get as low as 19ms on some games generally about 20-30ms
post #14 of 19
Quote:
Originally Posted by Nemesis158 View Post

Can they even call it fiber then, since there isnt any glass fiber in the cable? so it would just be an optic cable? air-optic cable? (maybe i should copyright the name now? rolleyes.gif ) i wonder how long it will take them to make an optical cable that has a vacuum inside it (would allow light to travel at 100% speed of light)

As it seems, they are using the silicon tube thingy just to make the light bounce inside. Basically, the exact same principle of using the critical angles to keep it inside... but the confining media being air.

Quite an interesting and clever approach!
   
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post #15 of 19
Quote:
Originally Posted by Maelthras View Post

I think I remember reading at the speed of light latency across the globe would be in the 50 ms range. But that's with a perfect network, I think 60-70 ms is more likely but still a huge improvement. Now for 1gbs internet.....

pretty easy to calculate: c = 299 792 km/s. Earth circumference = 40 075 km. So fastest physically possible would be 40 075 / 2 / 299 792 = 67 ms. In a very far future we might be able to tunnel through the core of the earth, that would bring min latency to 6371*2 / 299 792 = 43 ms but by that time we might have FTL communication tongue.gif.

Main application of this is probably undersea intercontinental connections if they are durable enough. Probably not worth it to replace normal fiber with this for shorter distances.
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post #16 of 19
another possibility is underwater sound surveillance systems.. Better signal to noise ratios definitely..
post #17 of 19
I don't know for you but I have 100Mb/s internet connection and I'm fine with it, the only time I feel bottlenecked is when the remote server limits download speed and we all know that happens often.

That's what should be improved imo but it's not easy to provide really fast speeds when you have millions of people downloading freely.

Now my upload speeds are still capped to 5Mb/s and I'd like to see it being improved.
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post #18 of 19
Thread Starter 
Quote:
Originally Posted by Sisaroth View Post

Main application of this is probably undersea intercontinental connections if they are durable enough. Probably not worth it to replace normal fiber with this for shorter distances.

Actually they haven't got the signal loss down far enough to use it for that, yet (unless they've pulled a ninja on The University of Southampton).

http://www.extremetech.com/computing/151498-researchers-create-fiber-network-that-operates-at-99-7-speed-of-light-smashes-speed-and-latency-records

Quote:
As for real-world applications, loss of 3.5 dB/km is okay, but it won’t be replacing normal glass fiber any time soon. For short stretches, though, such as in data centers and supercomputer interconnects, these speed-of-light fibers could provide a very significant speed and latency boost.

So if no more advances happen it would likely be more the reverse of what you say. But just to continue with the assumption that this is probably very similar to what DARPA is doing:
Quote:
To achieve the transmission rate of 73.7 terabits per second, the researchers used wave division multiplexing (WDM), combined with mode division multiplexing, to transmit three modes of 96 channels of 256Gbps.

Now that's fire wire.
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post #19 of 19
Quote:
Originally Posted by Eggs and bacon View Post

Possibly (from my understanding on polarization) you could have the same wave length of light with multiple channels, kind of like a vertical channel and a horizontal channel, but I may very well be completely wrong.

That sounds like it is on the money.
Adding to it with my understanding, You have each channel on a different plane, So Vertical, Horizontal, Diagonal at 45 degrees etc.
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