Equalization of negative-exponential fading in saturated semiconductor optical amplifiers


In this paper, we discuss the mitigation of negative-exponential fading in Optical Wireless Communication (OWC) systems. The mitigation technique involves the utilization of a semiconductor optical amplifier (SOA) whose gain saturates in normal link operation, but which also provides a power-dependent varying gain when the link experiences a fade. The unbalanced SOA operation serves towards the equalization of the signal power at its output and as a result the link fades become less severe and of reduced duration. Our analytical results predict that the fade probability can be reduced by over 90% under negative-exponential fading conditions, while the scintillation index at the SOA output is also reduced by 75% if an optimal level of received power, and therefore gain saturation, is observed. Finally, our results show that the average duration of fades can also be reduced by a significant percentage of 68% for the same level of gain saturation in the SOA.

DOI: 10.1109/CSNDSP.2014.6923955

3 Figures and Tables

Cite this paper

@article{Yiannopoulos2014EqualizationON, title={Equalization of negative-exponential fading in saturated semiconductor optical amplifiers}, author={Konstantinos Yiannopoulos and Nikos C. Sagias and Anthony C. Boucouvalas}, journal={2014 9th International Symposium on Communication Systems, Networks & Digital Sign (CSNDSP)}, year={2014}, pages={894-898} }