Optical Fiber Bandwidth

There is an exact Optical Fiber Bandwidth limitation of optical fiber however, and this is measured in MHz per km. The easiest way to understand why this loss happens is to refer to Figure .

All of the above attenuation aspects result in simple attenuation that is independent of bandwidth. In other words, a 3 dB loss means that 50% of the light will be lost whether it is getting modulated at 10Hz or 100 MHz.As Figure 6 demonstrates, a ray of light that goes into a fiber comparatively straight or at a slight angle (M1) has a shorter path through the fiber than light which enters at an angle close to the maximum acceptance angle (M2). As a result, different rays (or modes) of light arrive at the end of fiber at diverse times, although the original resource is the same LED or LD