What is the communication range for visible light?

What is the communication range for visible light?

380 nm to 750 nm
Visible Light Communication (VLC) systems employ visible light for communication that occupy the spectrum from 380 nm to 750 nm corresponding to a frequency spectrum of 430 THz to 790 THz as shown in Fig. 2.

What type of communication uses visible light?

Visible light communication (VLC) is a data communications variant which uses visible light between 400 and 800 THz (780–375 nm). VLC is a subset of optical wireless communications technologies.

Which type of light source gives high data rate?

Compared with the traditional light sources like incandescent bulbs, LEDs have high modulation performance, highly responsive, and sensitive along with other characteristics that make them suitable for the data modulation and transmission.

What do you call the application of visible light in telecommunications?

What is VLC? VLC is a free-space optical wireless communication technology that uses visible light to transmit data across distances. The concept is simple. Varying the intensity of a beam of light can be used to encode information.

How is visible light used in daily life?

When all the colors are together, they make the normal “white” light that we see. Visible light is extremely important to humans, we use it TO SEE! Without light, our eyes would not be able to see images of anything. Visible light waves also make our TV, computer and cell phone screens work.

What are the components of visible communication?

Visible light communication is a revolutionary piece of communication technology that takes advantage of the surge in popularity of solid state lighting to open up numerous additional channels in which to transmit data. A VLC system is composed of two parts: the transmitter and the receiver.

Is LiFi harmful?

Health concerns & restricted usage In contrast, LiFi transmits data through light waves on the electromagnetic spectrum, so is completely free from harmful radiofrequency radiation. Similarly, LiFi technology can be used in environments where WiFi is considered a hazard.

Why is LiFi not popular?

Li-Fi refers to this as visible light communication (VLC) which can transmit data by utilizing light up to speeds of 224 gigabits per second. This means a Li-Fi connection will not improve the performance of internet media such as video conferencing, playing video games, or talking on the phone via the internet (VoIP).

What are the effects of visible light on humans?

The visible light radiation can exert various biologic effects such as erythema, pigmentation, thermal damage and free radical production. Addtionally, visible light exposure can cause or exacerbate photodermatoses such as solar urticaria, chronic actinic dermatosis (CAD) and cutaneous porphyrias.

What is visible light used for?

Visible light is the light we can see, so is used in photography and illumination. It is also used in fibre optic communications, where coded pulses of light travel through glass fibres from a source to a receiver.

How is visible light used in wireless communication?

Visible light communication ( VLC) is a data communications variant which uses visible light between 400 and 800 THz (780–375 nm). VLC is a subset of optical wireless communications technologies. The technology uses fluorescent lamps (ordinary lamps, not special communications devices) to transmit signals…

How does visible light communication ( VLC ) work?

Visible light communication (VLC) is a wireless method that enables high-speed transmission of data with visible light. This data is transmitted by modulating the intensity of light given off by a light source. The signal is received by a photodiode device that transforms the data into forms that are readable and readily-consumed by end users.

Which is part of the electromagnetic spectrum does visible light use?

Visible light is only a small portion of the electromagnetic spectrum. Visible light communication (VLC) is a data communications variant which uses visible light between 400 and 800 THz (780–375 nm). VLC is a subset of optical wireless communications technologies.

Who was the inventor of visible light communication?

The history of Visible Light Communications (VLC) dates back to the 1880s in Washington, D.C. when the Scottish-born scientist Alexander Graham Bell invented the photophone, which transmitted speech on modulated sunlight over several hundred meters. This pre-dates the transmission of speech by radio.