Convert SFC or ethernet NIC to FSO/Laser/Optic link

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Convert SFC or ethernet NIC to FSO/Laser/Optic link

Postby dagelf » October 13th, 2015, 5:13 pm

Hi All

I don't have much time to research or do this myself at the moment, but considering the cost of Free Space Optic (FSO) links, I was wondering if anyone knows of- or is keen to explore the possibility of hacking cheap NIC's or Fiber media converters to communicate through some LED's and lenses, or laser diodes.

The projects that I do know of only offer low bandwidth:
RONJA (http://ronja.twibright.com/)
Koruza (http://irnas.eu/UsefulSource/koruza/koruza1.xml) (This is actually an SFC hack)
..can't remember the others now

Some relevant searches:
https://www.google.co.za/search?q=diy+fso
https://www.google.co.za/search?q=ethernet+via+laser

Other keywords: Visible light communication (VLC), Terrestrial laser communications, Li-Fi / LiFi, Optical Wireless Communications
dagelf
 
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Joined: October 13th, 2015, 4:11 pm

Re: Convert SFC or ethernet NIC to FSO/Laser/Optic link

Postby dagelf » October 13th, 2015, 6:31 pm

Oh, here's another:
http://modulatedlight.org/optical_comms ... index.html

But my initial question is basically answered with http://koruza.net/ - the creator of which has received a Shuttleworth Fellowship which funds him for a year to get it to a mature point, in an open fashion!
dagelf
 
Posts: 2
Joined: October 13th, 2015, 4:11 pm

Re: Convert SFC or ethernet NIC to FSO/Laser/Optic link

Postby st2000 » October 16th, 2015, 8:59 pm

Out side, right? I have to ask - if it rains, snows or the wind blows up dust or leaves... where does that leave you? I'm thinking the reasons not to relay a light beam network outweigh the low costs. You could add redundancy and / or error correction. But this is the physical layer. I think most error correction is handled higher in the TCP/IP stack.

While you're waiting for this guy to finish up, why don't you take a look at the (abandoned?) IRDA specifications. Specifically, the IRLAN. It's a lot slower and isn't meant to go more than several feet. But you'll get an idea of all the thought that goes into creating the underlying light beam protocol.
st2000
 
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