An optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. (So it is not conductive.)
Optical fiber can be used as a medium for telecommunication and computer networking because it is flexible and can be bundled as cables. It is especially advantageous for long-distance communications, because light propagates through the fiber with little attenuation compared to electrical cables. This allows long distances to be spanned with few repeaters.
There are many different types of optical fiber.
Fiber with large core diameter (greater than 10 micrometers) may be analyzed by geometrical optics. Such fiber is called multi-mode fiber, from the electromagnetic analysis (see below).
The propagation of light through a multi-mode optical fiber.
A laser bouncing down an acrylic rod, illustrating the total internal reflection of light in a multi-mode optical fiber.
The price of this material depends on its thickness and length.
The link is under below.
There are some different types of fiber optic on this website.
I bought each of them to do some experiment and found that the light through them are really weak.
And even it said on the website that Side Beam fiber optic cable can transmit light over the entire length of the solid core optic, without electricity or heat, the light is very faint and only can be seen on the both ends of the filament.
Side Beam fiber optic cable
Here are some example of this material.
I am think about doing an interactive mask with this material.