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Scientists claim wireless optical breakthrough 
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http://www.pcpro.co.uk/news/355189/scie ... eakthrough

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“Unless the walls are painted solid black, there is no need to worry about transmission within a room,” he said.


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Sat Jan 30, 2010 1:42 am
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Will we have to have a big glittery brick reciever on a tall stick to connect?




mmmmm convenient.






Suppose it will get smaller with time, but will we all have to wera sunglasses to cope with the glare. Matrix anyone?

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Sat Jan 30, 2010 9:09 am
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Wifi works in this house because it can penetrate walls. I can't see that light would work well in that situation unless you had disco balls set up as repeaters.

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Sat Jan 30, 2010 9:19 am
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Maybe because I've been up and about for the last 3 hrs without breakfast but surely flickering optic fibres means the room ambient light would also flicker?

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Sat Jan 30, 2010 11:55 am
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“The optical system we have offers a very large bandwidth thus a very high speed,” said Jarir Fadlullah, an electrical engineer at Penn State. "We can send 1Gb/sec or more over a gigahertz band."

Optical = 400 - 790 THz

Not Gigahertz

Gigahertz = Microwave.

:roll:

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Sat Jan 30, 2010 1:43 pm
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rustybucket wrote:
Quote:
“The optical system we have offers a very large bandwidth thus a very high speed,” said Jarir Fadlullah, an electrical engineer at Penn State. "We can send 1Gb/sec or more over a gigahertz band."

Optical = 400 - 790 THz

Not Gigahertz

Gigahertz = Microwave.

:roll:

I imagine he was referring to the sub-carrier.

It's not easy to directly modulate, discriminate and demodulate in the optical frequencies directly, so information is usually embedded in a sub-carrier at a frequency which modern electronics can actually work at.

Working directly with optical frequencies requires a purely optical system. While some such systems do exist and are extremely powerful and interesting, they are not very flexible and only suited to certain simple but massively parallel tasks.

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Sat Jan 30, 2010 2:22 pm
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Is anyone else reminded of this...

http://www.youtube.com/watch?v=5XGaOzm3 ... re=related

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Sat Jan 30, 2010 8:13 pm
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I was thinking more of:
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