Frequency Chirp Characteristics on WDM Direct Modulation

The paper studies the characteristic of frequency chirp in optical communication network as well as the association of the chirp and BER intended for utilization of directly modulated wavelength division multiplexing (WDM). The research was made based on a simulation of a direct modulated link for different bit rates and fiber lengths to evaluate the effect of those parameters on frequency chirp. The result shows that the performance of the WDM direct modulation link is affected by the transmission bit rates and the distance.