Measurement of Pulse Dispersion in Optical Fiber Communication System

摘要

Fiber optic communication technologies are constantly growing and facing more challenges that limit its ability to transmit for long distances with great capacity. One of these challenges is the degradation phenomenon that occurs when optical signals pass through the fiber. There are two causes of degradation-power attenuation and dispersion. Minimization of these effects will help the system to support long haul transmission with high capacity. The dispersion effect is studied and analyzed in this paper. The typical dispersion coefficient for Plastic Optical Fiber is 0.3 ns/nm.m and from practical measurement we have found it to be 22 ns/nm.m. Simulation is done to show the output response for glass fiber. It is found that for single mode fiber with 1550 nm Laser source and speed of 2.5 Gbps, the system performance is limited to a distance of 15 km and this is due to the high dispersion and attenuation effect.