[TriLUG] The next Arpanet? 10 Billion bits per second? "Woah"

[Keith Johnson]

At 09:25 PM 3/3/2004 -0500, you wrote:
>crimsun at fungus.sh.nu wrote:
>
>>On Wed, Mar 03, 2004 at 04:42:39PM -0500, Joshua Gitlin wrote:
>>
>>
>>>Just saw this in the News and Observer. [ 
>>>http://newsobserver.com/business/story/3385140p-3011134c.html ]. Thought 
>>>it might interest some people here. I'd love to learn more about it. I 
>>>can't tell if it's IP based, or what. Sounds cool though!
>>>
>>
>>Take a look at http://www.nationallambdarail.org/architecture.html
>>
>>
>If you read the fine print at this link, you may come to the realization 
>that I have: It's not 10Gb, it's 400Gb. They're using DWDM (Dense 
>Wavelength Division Multiplexing) - which from my fiber experience (many 
>years ago) sounds like the big brother to multi-mode fiber. With the 
>obvious differences being it works over distances previously only possible 
>via single-mode fiber (i.e. only one beam of light down one tube of 
>glass), and it's a heckuva' lot more transmission paths (beams of light 
>down one tube of glass).
<snip>

WDM and DWDM both use single mode fiber. The modes in MM fiber are there 
only because of the multiple injection angles of a single wavelength light 
source.

keith