Optical carrier erasing is demonstrated with evaluation of further remodulation up to 12.5Gbps. Small impairments achieved for all but the 7G-7G and 12.5G-12.5G cases, when spurious-pattern noise force higher penalties (respectively 2.3dB and 0.7dB).

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The amplitude modulated sinusoidal pattern over an optical carrier is suppressed by a deeply saturated ultra‐long semiconductor optical amplifier. The extinction‐ratio of the modulated signal is reduced from 16.8 to 3.9 dB at 15 GHz. The characterization of the amplitude modulation suppression is presented, with good results for broadband operation (15 nm at 1557 nm), high‐speed (up to 35 GHz) and high input extinction‐ratio (up to 16.8 dB). © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1286–1290, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26010

A technique to estimate semiconductor optical amplifiers gain parameters is presented based on spectral noise measurements. Theoretical results based on the extracted parameters were compared with experimental results using linear and non-linear semiconductor optical amplifiers of various lengths. The experimental data and the results produced by estimated parameters show good agreement, which validates the technique.