You have absolutely no clue about the myriad of obstacles of linking two near points in crowded cities in LatAm, from regulatory obstacles, to spectrum congestion (2.4Ghz is useless, 5 Ghz wifi band is already crowded, 900 Mhz is unusable, and others EG Ubiquiti Airfiber 24Ghz is not a license-free band as it is in the US of A, so that leaves it out of the equation). Please, Americans, if you cant grasp the usefulness of this, dont make silly comments. “Why don’t you just use Wireless (RF) Links?” In particular, the 23 dB optical margin of KORUZA system, maintaining operational link up to 230 dB/km attenuation for 100 m link, which corresponds to less than 20 m visibility conditions.įire away with questions or see more blog posts on the topic at: įire away and other questions or see more blog posts on the topic at: The results from an upcoming paper summarized:Įxperimental results, with respect to the KORUZA system, approximate the fog density in terms of visibility as experienced by the human eye, required to limit the system performance in the operational range of 100 m, to be significantly less than 50 m. We are working on properly quantifying this in a controlled environment and outdoors, see for the testing setup. Rain and snow generally do not have a significant effect on the system operation at 100m distance, however fog has a noticeable effect. In terms of reliability of the system, I am working with my team to properly quantify this through deploying a number of this units globally and figuring out their reliability, currently most significant problem is units mis-aligning due to thermal expansion of the KORUZA unit, mount and building itself, see more on the following blog:
#Gigabit ethernet optical isolator install
There is a mosfet output on the control board, such that one can easily install a heating element next to the lens, which might be most useful if the unit gets snowed in. Happy to answer all the questions you folks may so far we have not seen any problems due to condensation, because the unit is not air-tight and equalizes to outdoor temperature already. Very nice to my project featured here, it is also on. Posted in Slider, Wireless Hacks Tagged laser, LiFi, light, networking Post navigation And now that Li-Fi seems to be getting traction, we might see an unfocused equivalent running inside our homes. The Ronja project has been doing so since 2001, and over longer distances, with completely DIY hardware, if at a slower bitrate. We’ve always had a soft-spot in our heart for transmitting data over light beams. It’s a really neat system, and it’s fully DIY’able except for the commodity fiber-optic bits. Both Koruza boxes have a Raspberry Pi inside and use normal networking for calibration and signal-strength statistics. You make a rough alignment with a visible green laser, and then fine-tune the IR beams from a web console where you get immediate feedback on how the received signal strength is changing. Koruza does this by including motorized lenses on the 3D-printed chassis. Indeed, the system piggy-backs on existing fiber-optic equipment to get the job done, but the hard part is aligning the units to get maximum signal from point A to point B. The intended use-case is urban building-to-building communication at speeds that would otherwise require laying fiber-optic cables. The Koruza project is an open-source, “inexpensive” system that aims to transmit 1 Gb/sec over distances around 100 meters, using modulated infrared light. And while you can modulate radio signals up nearly to the carrier frequency, the few gigahertz we normally use for radio just won’t cut it for really high bit rates. It can be focused so that it doesn’t spill all over the neighborhood like radio signals do - giving it both some security against eavesdropping and preventing one signal from stepping on another’s toes. There are a couple of really great things about transmitting data using light as the carrier.
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