Spectral broadening is a phenomenon that occurs when the bandwidth of a signal or wave is increased, leading to a widening of the range of frequencies present in the signal. This can happen through various mechanisms, such as nonlinear effects, dispersion, or modulation of the signal. Spectral broadening is commonly observed in optical systems, where it can be used to generate supercontinuum light sources or to improve the resolution of spectroscopic techniques. In telecommunications, spectral broadening can also be employed to increase data transmission rates by allowing more information to be encoded in a wider frequency range.