[MLB-WIRELESS] Free Space Optics Info

[Todd Hubers]

>
> I wouldnt be surprised if even further was possible with a pair of
> Ubiquitiy AirFiber

I was told, that although Ubiquity AirFiber is rated to go quite far and
fast, that's with higher transmission power, in Australia it is not
generally allowed that high unlicensed. With the lower power level it
practically tops out at 10km. Still, it seems that RF is still the best for
longer distances to date. The main benefit I see for FSO is zero
interference, which is great for Medium Distance (1-2km). It apparently
works from 100m (sometimes 50m), for for some reason, short links are
generally not the configuration of such FSO products.

Chained links of 2km to cover big distances may be desirable, but with
unknown equipment costs, if RF links are just as good and cheaper or as
much, RF would be the clear winner. I would love to evaluate an FSO link.
It would be great to find the right product for the right application. It
could make for great PR (attracting more members) for the group to announce
such a link.

On Sat, Mar 28, 2015 at 8:20 PM, Outback Dingo <outbackdingo at gmail.com>
wrote:

>
>
> On Sat, Mar 28, 2015 at 12:27 PM, Todd Hubers <todd.hubers at alivate.com.au>
> wrote:
>
>> FSO was briefly discussed in the Geelong meet on Thursday - here's some
>> more information:
>>
>>    - 1Gbps up to 2km -
>>    http://www.digitalairwireless.com.au/outdoor-wireless-networks/point-to-point-wireless/laser-fso-links/geodesy-fso-laser-links.html
>>    - Up to 10Gbps is possible, distances unknown -
>>    http://www.markjulier.com/2011/07/gigabit-free-space-optical-links-1-10gbps/
>>    - A paper about it - http://cdn.intechopen.com/pdfs-wm/9002.pdf
>>    - Pushing the boundaries toward 10Gbps over 10km -
>>    http://www.hhi.fraunhofer.de/fields-of-competence/photonic-networks-and-systems/research-topics/optical-access-and-metro-networks/terrestrial-free-space-optics.html
>>
>> With the limitations of RF power in Australia/Victoria, longer links on
>> ISM bands are limited. We already have people climbing roofs and mounting
>> masts, as FSO improves it may be interesting and valuable to try such tech
>> for P2P links. It would be quite possible to increase the speed on some
>> point to point links already deployed.
>>
>> *Application to ForestNet*
>>
>> A 1Gpbs 30km link from Mt Moriac to Otways doesn't sound feasible with RF
>> capabilities and regulations. Shorter links may be feasible, and use of FSO
>> may be considered.
>>
>> I only performed a quick search of current FSO capabilities. There may be
>> better stuff out there.
>>
>
> Not sure i undersdtand how you figured that out.... I wouldnt be surprised
> if even further was possible with a pair of Ubiquitiy AirFiber.
>
>
>
>>
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>>
>
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-- 
Regards,

Todd Hubers
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