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Analysis of All-Optical Wavelength Convertem based on Cross-Gain Modulation in two cascaded Semiconductor-Optical Amplifiers

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The performance of two-stages wavelength converters based on cross-gain modulation (XGM) in semiconductor-optical amplifiers (SOA) is investigated analytically. It is shown that the extinction ratio in dB can nearly be doubled. At a bitrate of 1Gbit/s, power penalties of less than 0.4dB are obtained for wavelength shifts in the range −20 nm < Δλ < +20 nm. However, the dynamic range (8dB) is smaller, and the converter losses as well as the output power range is larger compared to XGM in a single SOA.

© 1997 Optical Society of America

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