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Date: 31 Oct 2006 06:45:26
From: esmartguy
Subject: Laser optic's communications
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Laser broad band fiber optic communications system think of using a
laser the same way as fiber optic cable but through the air I'm
thinking line of site let's move at light speed shell we think of it.
Say good by to cable TV and say hello to laser optic communications say
good by to cloudy days water and ice crystals are know match for a
laser come on now. I bet the federal government would love to get a
hold of this one.
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Date: 31 Oct 2006 08:34:59
From: AustinMN
Subject: Re: Laser optic's communications
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esmartguy wrote:
> Laser broad band fiber optic communications system think of using a
> laser the same way as fiber optic cable but through the air I'm
> thinking line of site let's move at light speed shell we think of it.
> Say good by to cable TV and say hello to laser optic communications say
> good by to cloudy days water and ice crystals are know match for a
> laser come on now. I bet the federal government would love to get a
> hold of this one.
Trolling, trolling, trolling...claims in headers to be an inventor and
CEO, but uses dialup...
Austin
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Date: 31 Oct 2006 08:05:51
From:
Subject: Re: Laser optic's communications
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A laser shot through a telescope to another telescope some distance
away to be picked up by a detector is certainly a way to communicate
optically. Communications through the vacuum of space using this
technique is very reliable.
What bandwidth?
Well one way to get high speeds is to have a TV picture transmitted to
a TV camera sort of
deal, and modulate each pixel in the image to send a data stream
http://www.fujitsu.com/global/news/pr/archives/month/2005/20050121-01.html
This is what fujitsu has done with its technology. 64 channels each at
10 Gb/s - is 640 Gb/s. Not too shabby.
But high speed semiconductor switches (not mirror based) can operate in
the 100 femtosecond range switch speeds.
http://www.spie.org/app/Publications/magazines/oerarchive/july/jul99/cover1.html
This means the switch rate is 10 Thz!! If a 1,000 x 1,000 element
array of these babies could be placed on a semiconductor and at the
focus of a telescope, and aimed at another telescope with a 1,000 x
1,000 element detector and each element was modulated at 10 THz, you
could communicate at the incredible speed of 10 quintillion hertz!
That's 1 trillion channels of 10 Mhz EACH! A network of satellites
could provide global wireless broadband to modest transmitter recievers
on the ground for about $1 per channel per year!!!
Not too shabby!
I described a detailed satellite setup that would achieve a more modest
5 billion channel versoin of this including microwave downlink - but it
got zapped for some reason.
C'est la vie.
esmartguy wrote:
> Laser broad band fiber optic communications system think of using a
> laser the same way as fiber optic cable but through the air I'm
> thinking line of site let's move at light speed shell we think of it.
> Say good by to cable TV and say hello to laser optic communications say
> good by to cloudy days water and ice crystals are know match for a
> laser come on now. I bet the federal government would love to get a
> hold of this one.
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