Length estimation of single-mode fiber links under group velocity dispersion GVD effect using 1 dB power penalty toleration

Abstract EN

Intermodal dispersion in multimode fibers leads to considerable broadening of optical pulses during transmission.

Although intermodal dispersion can be overcome by using single-mode fibers, pulse broadening does not disappear altogether.

This is due to another phenomenon called group velocity dispersion.

The main goal of this paper is to estimate the maximum optical transmission length that can be achieved under the effect of group velocity dispersion GVD when single-mode fiber is used.

Optical sources with large spectral width and small spectral width were assumed in this study.

Bit rates of 622 Mbps, 1 Gbps, 2.5 Gbps, and 10 Gbps were assumed in the study as well, as they are the most commonly used in the optical access systems.

The study was performed using Matlab software (The Mathworks, Inc., Natick, MA, USA).

Although a significant improvement were observed when using an optical source with small spectral width in which the GVD noise floor is reached at much longer fiber, a dramatic reduction in the transmission distance is encountered when the bit rate reaches 10 Gbps, which necessitates incorporation of a dispersion compensation technique in the transmission line.