x404.co.uk
http://www.x404.co.uk/forum/

Scientists claim wireless optical breakthrough
http://www.x404.co.uk/forum/viewtopic.php?f=19&t=5844		 Page 1 of 1
Author:  pcernie [ Sat Jan 30, 2010 1:42 am ]
Post subject:  Scientists claim wireless optical breakthrough
http://www.pcpro.co.uk/news/355189/scie ... eakthrough

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


Goths get upset. Probably, it's hard to tell ;)
Author:  mikepgood [ Sat Jan 30, 2010 9:09 am ]
Post subject:  Re: Scientists claim wireless optical breakthrough
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?
Author:  belchingmatt [ Sat Jan 30, 2010 9:19 am ]
Post subject:  Re: Scientists claim wireless optical breakthrough
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.
Author:  cloaked_wolf [ Sat Jan 30, 2010 11:55 am ]
Post subject:  Re: Scientists claim wireless optical breakthrough
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?
Author:  rustybucket [ Sat Jan 30, 2010 1:43 pm ]
Post subject:  Re: Scientists claim wireless optical breakthrough
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:
Author:  JJW009 [ Sat Jan 30, 2010 2:22 pm ]
Post subject:  Re: Scientists claim wireless optical breakthrough
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.
Author:  Fogmeister [ Sat Jan 30, 2010 8:13 pm ]
Post subject:  Re: Scientists claim wireless optical breakthrough
Is anyone else reminded of this...

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

Image
Author:  l3v1ck [ Sat Jan 30, 2010 10:57 pm ]
Post subject:  Re: Scientists claim wireless optical breakthrough
I was thinking more of:
Image
Page 1 of 1 All times are UTC
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/