Abstract
In the wavelength-division-multiplexed optical access network, the system architecture based on remodulating the downstream (DS) signal for upstream transmission resolves the issues of wavelength management and hardware cost . However, this amplitude remodulation scheme introduces intensity noise in the uplink and leads to a system performance penalty. Therefore, the DS extinction ratio () has to be optimized in order to balance the performance of up- and down- links. In this Letter, a novel technique is presented to overcome the restrictions on by introducing correlations into the levels of the DS signal to alter its spectrum. 4 dB improved tolerance to is achieved in the proposed system. The level-correlation coding technique is also able to mitigate the in-band crosstalk induced by Rayleigh backscattering. It is demonstrated that the system reach is extended by 40 km with the proposed approach.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Qi Guo and An V. Tran
J. Opt. Commun. Netw. 5(10) A119-A126 (2013)
Ching-Hung Chang, Wei-Chen Liu, Peng-Chun Peng, Hai-Han Lu, Po-Yi Wu, and Jyun-Bo Wang
Opt. Lett. 36(9) 1716-1718 (2011)
Qi Guo and An V. Tran
Opt. Express 20(26) B452-B461 (2012)