The Mexican team has achieved 10 Gbit/s visible light wireless data transmission

The Mexican team has achieved 10 Gbit/s visible light wireless data transmission

Speaking of "optical transmission", we are most likely to think of the optical fiber technology used for long-distance data transmission. But if the transmission distance is short, do we still need to "constraint" the optical signal in the optical cable? Unlike Wi-Fi and Bluetooth, there are already multiple research teams in the world studying short-range wireless transmission technology using visible light. The latest news is that a team from Mexico has successfully achieved 10 Gbps Visible data transmission.

Just as the birth of the word "Wi-Fi" draws on "Hi-Fi", people call this wireless form of visible light Data Communication (VLC) "Li-Fi ".

Unlike the infrared system, the VLC uses the optical band visible to the human eye to send data. However, due to the extremely fast flickering of the modulated LEDs, the human eyes are not aware of this degree.

The team first started to transmit the audio, placed a smartphone on a prototype table, and connected a 5mm audio cable. The bread is responsible for modulation and conversion of audio signals into special optical signals that can be sent by LED lights.

At the receiving end, they also humorously mounted a signal capturing device to a speaker, and then converted again to remodulated the optical signal into the original audio signal.

The Li-Fi research team claims 10 Gbps visible light transmission.

In fact, its technical principles are no different from those of wireless network transmission, but it only changes the signal receiving and receiving device. The Sisoft team said it had used the technology to transmit audio, video, and up to 10 Gbps Internet content.

Compared with similar Li-Fi systems, this can be a major breakthrough. Previously, the systems developed by Siemens and Pennsylvania State University reached a transmission rate of Mbps and Gbps respectively.

In addition to impressive transmission rates, SiSoft also highlights other advantages of this technology. For example, because the data is transmitted through visible light, it is more difficult to crack, and therefore it is more secure (even if it is "visible", it cannot be the case ).

In addition, this technology can be deployed in hospitals that are sensitive to electromagnetic radiation, or in areas where wireless signal interference needs to be blocked. Of course, it can also provide lighting while providing high-speed data transmission.