TITLE:
Performance Study of 1 Tbits/s WDM Coherent Optical OFDM System
AUTHORS:
Khaled Alatawi, Fahad Almasoudi, Mohammad A. Matin
KEYWORDS:
WDM; QAM; CO-OFDM; BER; OSNR
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.5,
August
26,
2013
ABSTRACT:
This 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 1800
Km 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 is 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 increases as the transmission distance increases. Also, as the transmission
distance increases, the OSNR needs to be increased to maintain BER in less than 10-3.