Re-modulated technology of WDM-PON employing different DQPSK downstream signals

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2012,（6）
• 页码范围: 473-476
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-012-2328-0

摘要

This paper proposes a kind ofmodulation architecture for wavelength-division-multiplexing passive optical network (WDMPON) employing optical differential 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-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.