Affiliation:
1. Xi’an University of Posts and Telecommunications
Abstract
A cascaded fiber Bragg grating (FBG) structure is proposed to reduce
the dispersion of optical signals in single-mode fibers. Using the
OptiSystem software for simulation, the three compensation schemes
(precompensation, postcompensation, and symmetric compensation) of
dispersion-compensated optical fiber (DCF) are analyzed, and the
results show that the best of the three schemes is the
postcompensation structure. For the postcompensation scheme, the
influence of the coding method and duty cycle on the system is
analyzed, and then the fiber grating is cascaded behind the
transmitter to obtain a narrow linewidth of the optical signal and
minimize the reflectivity sidelobe, and a chirped fiber grating is
connected in front of the receiver to compensate for the dispersion of
the channel residue. With or without cascaded FBGs, system performance
at different input powers and different transmission distances is
discussed. The results show that cascading fiber gratings can improve
the performance of the system.
Funder
Natural Science Foundation of Shaanxi
Province
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering