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

作　　者：高超 忻向军 余重秀 

机构地区：[1]School of Electronic Engineering,Beijing University of Posts and Telecommunications

出　　处：《Optoelectronics Letters》2012年第6期473-476,共4页光电子快报（英文版）

基　　金：supported by the National Internation Technology Cooperration(No.2012DFG12110);the National Natural Science Foundation of China(Nos.61077050and61077014);the Open Foundation of State Key Laboratory of Optical Communication Technologies and Networks(No.2010OCTN-02)

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.

关 键 词：MODULATION Passive optical networks 

分 类 号：TN929.1[电子电信—通信与信息系统]