Optical wireless communication “Li-Fi”: realized by GaN laser!
-Kyocera for demos and applications that do not use radio waves-
Report from the latest article in EE Times Japan
Kyocera’s Li-Fi (Light Fidelity):
Exhibited at the exhibition “Wireless Japan” (May 24-26, 2023).
Exhibited optical wireless communication “Li-Fi (Light Fidelity)” using GaN laser.
The GaN laser utilizes the 2014 Nobel Prize winner Shuji Nakamura’s blue LED.
Modern Morse code “Li-Fi”:
Li-Fi uses flashing lights to transmit data wirelessly. “modern Morse code” technology.
Wireless communication using radio waves:
Depending on the surrounding environment, there are problems such as radio wave interference occurring and radio waves being difficult to reach.
Li-Fi Advancement:
Li-Fi is a wireless communication technology that enables faster communication than radio waves.
The blue laser enables long-distance communication even in the sea where radio waves are difficult to pass.
Kyocera Li-Fi:
Kyocera has demonstrated communication up to 25 Gb/s (Gbps). Achieved 1Gbps with a commercial kit.
GaN laser display Finished product (left) / Built-in part (right) [Click to enlarge]
Using 2 PCs at a trade show:
A demonstration was held to transfer images taken with one PC camera to another PC via Li-Fi.
Uses of Li-Fi:
Li-Fi is used as sub-communication for general use.
It is used in “Hospitals and aircraft that handle precision machines that want to avoid the influence of radio waves”.
Li-Fi cannot communicate in places where light is blocked.
In other words, by intentionally blocking the light, the communication location can be limited.
Depending on the usage, it is separated from Wi-Fi.
BMW high beam:
GaN lasers are used in BMW’s EV “5 Series” front lights.
BMW’s high beam can illuminate up to 600m ahead.
Features of GaN material:
Si (silicon) material deteriorates faster than GaN.
By using GaN material, we have achieved high output in a small size (7 mm × 7 mm).
https://eetimes.itmedia.co.jp/ee/articles/2306/02/news101.html