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中文摘要：
This paper proposes a kind of modulation architecture for wavelength-division-multiplexing passive optical network(WDM-PON)employing optical differential quadrature phase shift keying(DQPSK)downstream signals and two different modu-lation formats of re-modulated upstream signals.At the optical line terminal(OLT),10 Gbit/s signal is modulated with DQPSK.At the optical network unit(ONU),part of the downstream signal is re-modulated with on-off keying(OOK)or inverse-return-to-zero(IRZ).Simulation results show the impact on the system employing NRZ,RZ and carrier-suppressed return-to-zero(CSRZ).The analyses also reflect that the architecture can restrain chromatic dispersion and channel crosstalk,which makes it the best architecture of access network in the future.
英文摘要：
This paper proposes a kind of modulation architecture for wavelength-division-multiplexing passive optical network （WDM- PON） employing optical differentia/quadrature phase shift keying （DQPSK） downstream signals and two different modulation formats of re-modulated upstream signals. At the optical line terminal （OLT）, 10 Gbit/s signal is modulated with DQPSK. At the optical network unit （ONU）, part of the downstream signal is re-modulated with on-offkeying （0OK） or inverse-return-to-zero （IRZ）. Simulation results show the impact on the system employing NRZ, RZ and carrier-suppressed return-to-zero （CSRZ）. The analyses also reflect that the architecture can restrain chromatic dispersion and channel crosstalk, which makes it the best architecture of access network in the future.
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