The chirp present in the transmitter of an optical communication system, when combined with the chromatic dispersion of the fiber, severely limits the achievable transmission rate. be repeated many times over a long distance. For example, prechirping the laser with ted in gain saturationThe temporal chirp of a light pulse is usually understood as the time dependence of its instantaneous frequency. As an example, consider a pulse with a Gaussian envelope and a quadratic. shifted fiber, so D~1 p nm km. The purpose of this paper is to describe and compare different techniques for measuring this kind of noise.
