Visible light communication modulation schemes?

[sherzadakhan]

visible light contains a range of frequencies i.e not of single frequency, then how visible light is used as a carrier in Visible light communication. Further more is it possible to modulate light (in tera HZ frequency range). what modulation scheme is possible and how it is implemented in VLC. Thanks

 

[scottdave]

There are lasers and diodes which can produce a very narrow frequency range (in the visible spectrum). Are you talking about beaming the signal or something like fiber optics?

 

[anorlunda]

Perhaps you are thinking of this https://en.wikipedia.org/wiki/Fiber-optic_communication#Wavelength-division_multiplexing

 

[jtbell]

The Wikipedia article https://en.m.wikipedia.org/wiki/Visible_light_communication
discusses “color shift keying”. A Google search for that term finds many articles.