Bit-dependent degradation caused by stimulated Brillouin scatteringin CPFSK coherent optical repeaterless systems with booster amplifiers |
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| Authors: | Ohkawa N Hayashi Y |
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| Affiliation: | NTT Opto-Electron. Labs., Kanagawa; |
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| Abstract: | An interesting phenomenon due to stimulated Brillouin scattering (SBS) is experimentally found in a CPFSK heterodyne system with a booster amplifier. We find that the demodulated waveform amplitudes of just a few distinguished bits are strongly suppressed leading to a significant increase in BER. It is confirmed that the BER degradation can be reduced by adjusting the threshold voltage bias of the receiver decision circuit |
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