100Gbps Light-Based Wireless Network

As we know that :-

Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through anoptical fiber.

Optical fiber communication networks can provide terabit aggregate capacities to buildings and offices within modern cities. Practical wireless systems are orders of magnitude below this capacity. News :-

Researchers at Oxford University are developing a wireless networking technology that uses light to beam information through the air at more than 100 gigabits per second (Gbps).

The technology could eventually provide a much faster alternative to WiFi, which currently tops out at about 7 Gbps in some of high tech. offices.or modern cities.

Light is already used to transmit data across fibre optic networks at high speed. These work by guiding the light along optical fibres using total internal reflection, so that no information is lost along the way.

However, transmitting information by beaming light through the air is more difficult, because there is no ‘light tunnel’ to guide the signal to where it needs to go.

The researchers have developed a system that uses a base station installed on the ceiling of a room to send and receive light signals from a computer.

The transmitter and receiver are both fitted with holographic beam steering technology, which uses an array of liquid crystals to create a “programmable diffraction grating” that reflects the light in the desired direction.

The technology works at distances of up to three metres, but the system requires a direct line of sight, and for now the computer must be in a fixed position,The speed of the system also depends on the field of view of the receiver; if the base station has a 60-degree field it can use six wavelengths, while a 36-degree field only supports three wavelengths.

The next step will be to develop a tracking system so that a user can place a laptop at a random spot on a table and have the system find it and create a link.

This Tech. is part of a larger effort to develop light-based wireless communications (known as LiFi), which uses the light that is already illuminating a room to send data signals.

Little Intro About LiFi

LiFi is designed to use LED light bulbs similar to those currently in use in many energy-conscious homes and offices. However, LiFi bulbs are outfitted with a chip that modulates the light imperceptibly for optical data transmission. LiFi data is transmitted by the LED bulbs and received by photoreceptors.

LiFi’s early developmental models were capable of 150 megabits-per-second. Some commercial kits enabling that speed have been released. In the lab, with stronger LEDs and different technology, researchers have enabled 10Gbps, which is faster than 802.11ad.

Benefits of LiFi:-

• Higher speeds than Wi-Fi.

• 10000 times the frequency spectrum of radio.

• More secure because data cannot be intercepted without a clear line of sight.

• Prevents piggybacking.

• Eliminates neighboring network interference.

• Unimpeded by radio interference.

• Does not create interference in sensitive electronics, making it better for use in environments like hospitals and aircraft.

By using LiFi in all the lights in and around a building, the technology could enable greater area of coverage than a single WiFi router. Drawbacks to the technology include the need for a clear line of sight, difficulties with mobility and the requirement that lights stay on for operation.

Thanks for reading , stay tuned ... :)

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About Rakshit Shah

Fullstack & Expert Software developer with Java, Angular & Node skills

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