Optical Reshaping of 40-Gb/s NRZ and RZ Signals Without Wavelength Conversion |
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Authors: | Contestabile G. Presi M. Proietti R. Ciaramella E. |
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Affiliation: | Scuola Superiore Sant'Anna, Pisa; |
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Abstract: | We experimentally demonstrate a scheme for all-optical reshaping at 40 Gb/s that is wavelength preserving and transparent to both nonreturn-to-zero and return-to-zero on-off keying signals. Eye-diagram reshaping is confirmed by means of bit-error rate versus threshold measurements on both modulation formats. The scheme is based on cross-gain compression in an semiconductor optical amplifier (SOA) and uses two SOAs that are not in interferometric configuration. Due to its working principle, this method is polarization-independent and suitable, in principle, for higher bit rates. |
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