Bi Meihua, Xiao Shilin, He Hao, Yi Lilin, Li Zhengxuan, Li Jun, Yang Xuelin, Hu Weisheng
State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Opt Express. 2013 Jul 15;21(14):16528-35. doi: 10.1364/OE.21.016528.
We propose a symmetric 40-Gb/s aggregate rate time and wavelength division multiplexed passive optical network (TWDM-PON) system with the capability of simultaneous downstream differential phase shift keying (DPSK) signal demodulation and upstream signal chirp management based on delay interferometer (DI). With the bi-pass characteristic of DI, we experimentally demonstrate the bidirectional transmission of signals at 10-Gb/s per wavelength, and achieve negligible power penalties after 50-km single mode fiber (SMF). For the uplink transmission with DI, a ~11-dB optical power budget improvement at a bit error ratio of 1e-3 is obtained and the extinction ratio (ER) of signal is also improved from 3.4 dB to 13.75 dB. Owing to this high ER, the upstream burst-mode transmitting is successfully presented in term of time-division multiplexing. Moreover, in our experiment, a ~38-dB power budget is obtained to support 256 users with 50-km SMF transmission.
我们提出了一种对称的40Gb/s聚合速率时分和波分复用无源光网络（TWDM-PON）系统，该系统能够基于延迟干涉仪（DI）同时进行下行差分相移键控（DPSK）信号解调以及上行信号啁啾管理。利用DI的旁路特性，我们通过实验证明了每波长10Gb/s信号的双向传输，并在50公里单模光纤（SMF）传输后实现了可忽略不计的功率代价。对于采用DI的上行链路传输，在误码率为1e-3时获得了约11dB的光功率预算改善，并且信号的消光比（ER）也从3.4dB提高到了13.75dB。由于这种高消光比，时分复用方式下的上行突发模式传输得以成功实现。此外，在我们的实验中，获得了约38dB的功率预算，以支持通过50公里SMF传输的256个用户。
