In this paper, a novel high-spectral-efficiency modulation scheme using square time pulses in orthogonal wavelength-division multiplexing is proposed. Experimental results demonstrate the significant reduction of the interchannel linear crosstalk-induced penalty compared with Gaussian return-to-zero (RZ) modulation. The proposed technique allows a maximum spectral efficiency of 1 b/s/Hz. Simulation studies and experimental work confirming the expected performance are presented.
© 2005 IEEE
R. Llorente, J. H. Lee, R. Clavero, M. Ibsen, and J. Martí, "Orthogonal Wavelength-Division-Multiplexing Technique Feasibility Evaluation," J. Lightwave Technol. 23, 1145- (2005)