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Bit-dependent degradation caused by stimulated Brillouin scattering in CPFSK coherent optical repeaterless systems with booster amplifiers

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2 Author(s)
Ohkawa, N. ; NTT Opto-Electron. Labs., Kanagawa, Japan ; Hayashi, Y.

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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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 5 )