Enhanced reflection tolerance in WDM-PON by chirped RZ modulation

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Enhanced reflection tolerance in WDM-PON by chirped RZ modulation

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Published

In a central light seeded PON, it is shown that the resilience to the Rayleigh backscattering can be strongly different for NRZ or RZ-direct modulated R-SOAs at the OLT. It is experimentally demonstrated that the RZ modulated signal has an increased tolerance to the in-band crosstalk compared to NRZ format, thanks to the spurious chirp. Error-free uplink communications down to 10 dB signal-to-crosstalk level are obtained.

Inspec keywords: optical modulation; optical crosstalk; optical fibre networks; wavelength division multiplexing; semiconductor optical amplifiers

Other keywords: reflection tolerance enhancement; in-band crosstalk; passive optical networks; NRZ direct modulated R-SOA; reflective semiconductor optical amplifiers; Rayleigh backscattering; optical line terminal; WDM-PON; RZ modulated signal

Subjects: Multiplexing and switching in optical communication; Semiconductor lasers; Laser beam modulation, pulsing and switching; mode locking and tuning; Optical fibre networks

References

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      • P.J. Urban , A.M.J. Koonen , G.D. Khoe , H. de Waardt . Interferometric crosstalk reduction in an RSOA-based WDM passive optical network. J. Lightwave Technol.
    2. 2)
      • C.F. Marki , A.F. Marki , S.C. Esener . Reduction of interferometric optical crosstalk penalty via DC blocking. Electron. Lett. , 11 , 644 - 646
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      • A. Chiuchiarelli , M. Presi , R. Proietti , G. Contestabile , P. Choudhury , L. Giorgi , E. Ciaramella . Enhancing resilience to Rayleigh crosstalk by means of line coding and electrical filtering. IEEE Photonics Technol. Lett. , 2 , 85 - 87
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    5. 5)
      • C. Arellano , K. Langer , J. Prat . Reflections and multiple Rayleigh backscattering in WDM single-fiber loopback access networks. J. Lightwave Technol. , 1 , 12 - 18
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