Transmission simulation of coherent optical （相干光传输模拟）.pdf

Transmission simulation of coherent optical OFDM signals in WDM systems Hongchun Bao and William Shieh ARC Special Research Centre for Ultra-Broadband Information Networks, Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne VIC 3010, Australia h.bao@.au; w.shieh@.au Abstract: In this letter, we first present the theoretical basis for coherent optical OFDM systems in direct up/down conversion architecture. We then demonstrate the transmission performance through simulation for WDM systems with coherent optical OFDM (CO-OFDM) including the fiber nonlinearity effect. The results show that the system Q of the WDM channels at 10 Gb/s is over 13.0 dB for a transmission up to 4800 km of standard-single-mode-fiber (SSMF) without dispersion compensation. A novel technique of partial carrier filling (PCF) for improving the non- linearity performance of the transmission is also presented. The system Q of the WDM channels with a filling factor of 50 % at 10 Gb/s is improved from 15.1 dB to 16.8 dB for a transmission up to 3200 km of SSMF without dispersion compensation. ©2007 Optical Society of America OCIS codes: (060.0060) Fiber optics and optical communications; (060.1660) Coherent communications; (0606.5060) Phase modulation References and links 1. S. Hara and R. Prasad, Multicarrier Techniques for 4G Mobile Commmications, (Artech House, Boston, 2003). 2.