%0 Journal Article
%T Performance Study of 1 Tbits/s WDM Coherent Optical OFDM System
%A Khaled Alatawi
%A Fahad Almasoudi
%A Mohammad A. Matin
%J Optics and Photonics Journal
%P 330-335
%@ 2160-889X
%D 2013
%I Scientific Research Publishing
%R 10.4236/opj.2013.35051
%X <p class=\"MsoNormal\">
	<span lang=\"EN-US\" style=\"font-family:Verdana;\">This</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\"><span style=\"font-family:Verdana;\">paper investigates the
architecture of Tbits/s Wavelength Division Multiplexing (WDM) system by using
a Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) with
4-QAM for long haul transmissions of </span><st1:chmetcnv tcsc=\"0\" numbertype=\"1\" negative=\"False\" hasspace=\"True\" sourcevalue=\"1800\" unitname=\"km\" w:st=\"on\"><span style=\"font-family:Verdana;\">1800
 Km</span></st1:chmetcnv><span style=\"font-family:Verdana;\"> SM. A simulation of 20 WDM channels spaced at 50 GHz, and 20
OFDM signals each with 50 Gbits/s bitrate to produce data rate of 1 Tbits/s </span></span><span lang=\"EN-US\" style=\"font-family:Verdana;\">is</span><span lang=\"EN-US\" style=\"font-family:Verdana;\"> built. The system performance is
studied by observing the constellation diagram of the signal and the
relationship of BER and OSNR with regard to transmission distance. The results
show that the BER</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\" style=\"font-family:Verdana;\">increase</span><span lang=\"EN-US\" style=\"font-family:Verdana;\">s</span><span lang=\"EN-US\" style=\"font-family:Verdana;\"> as the transmission distance increases. Also, as the transmission
distance increase</span><span lang=\"EN-US\" style=\"font-family:Verdana;\">s</span><span lang=\"EN-US\" style=\"font-family:Verdana;\">, the OSNR need</span><span lang=\"EN-US\" style=\"font-family:Verdana;\">s</span><span lang=\"EN-US\" style=\"font-family:Verdana;\"> to be increased to maintain BER </span><span lang=\"EN-US\" style=\"font-family:Verdana;\">in </span><span lang=\"EN-US\"><span style=\"font-family:Verdana;\">less than 10<span style=\"line-height:15px;\"><sup>-3</sup></span></span><span style=\"font-family:Verdana;\">.</span></span> 
</p>
%K WDM
%K QAM
%K CO-OFDM
%K BER
%K OSNR
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=36246