Abstract
The impact of optical OFDM (orthogonal frequency division multiplexing) with adaptive modulation on reducing the filter concatenation effect is investigated, for the first time, in intensity modulation and direct-detection transparent metropolitan/regional network systems incorporating cascaded reconfigurable optical add/drop multiplexers (ROADMs). The ROADMs considered are based on different optical filters including fiber Bragg grating, Chebyshev, thin film and wavelength-blocker/wavelength-selective switch devices. It is shown that, in comparison with conventional identical modulation, adaptive modulation can improve the system performance by a factor of up to 60%. The utilization of adaptive modulation can also significantly enhance the network tolerance to filter loss ripple, group delay ripple and frequency dip.
©2011 Optical Society of America
Full Article | PDF ArticleMore Like This
E. Giacoumidis, A. Kavatzikidis, A. Tsokanos, J. M. Tang, and I. Tomkos
J. Opt. Commun. Netw. 4(10) 769-778 (2012)
Steven Searcy, Thomas Richter, Sergey Burtsev, and Sorin Tibuleac
J. Opt. Commun. Netw. 14(6) C50-C56 (2022)
Zizheng Cao, Lei Zou, Lin Chen, and Jianjun Yu
J. Opt. Commun. Netw. 3(9) 758-766 (2011)