What type of light do optical fibers transmit to carry data?

Optical fibers are designed to transmit light signals that are used for data transmission. The correct answer indicates that both laser light and LED light can be used for this purpose, which is accurate. Laser light is typically used in single-mode fibers, which are designed for long-distance data transmission and allow for higher bandwidth capabilities. On the other hand, LED light sources are often employed in multimode fibers, specialized for shorter distances and usually offering a more cost-effective solution.

The choice of light source influences the performance characteristics of the fiber optic system, including bandwidth, distance capabilities, and cost. Since both types of light are fundamental in various applications of fiber optics—serving different needs in telecommunications and networking—understanding that both laser and LED light can efficiently carry data is essential for professionals in the field. This is why the option indicates that both forms of light are legitimate in the context of fiber optics.