Multicore-fiber-enabled wsdm optical access network with centralized carrier delivery and rsoa-based adaptive modulation
Multicore-fiber-enabled wsdm optical access network with centralized carrier delivery and rsoa-based adaptive modulation
复制标题
支持多核光纤的 wsdm 光接入网络，具有集中式载波传输和基于 rsoa 的自适应调制
DOI：
10.1109/jphot.2015.2445103
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发表时间：
2015
影响因子：
2.4
通讯作者：
Shum Perry Ping
中科院分区：
文献类型：
--
作者：
Feng Zhenhua;Li Borui;Tang Ming;Gan Lin;Wang Ruoxu;Lin Rui;Xu Zhilin;Fu Songnian;Deng Lei;Tong Weijun;Long Shengya;Zhang Lei;Zhou Hongyan;Zhang Rui;Liu Shuang;Shum Perry Ping
提出并实验验证了一种基于反射半导体放大器（RSOA）的波长空分复用（WSDM）光接入网络架构，该架构采用多芯光纤（MCFs）和自适应调制技术实现集中式光载波传输。在我们的实验中，五个外核仅用于单向下行（DS）传输，而剩余的外核用作专用信道来传输上行（US）信号。用于US的光载波从光线路终端（奥尔特）通过内核传递到光网络单元（ONU），然后在无色ONU侧经RSOA放大和调制后传输回奥尔特。移动的回程（MB）服务也由内核支持。为了避免双向传输中的瑞利后向散射效应，在US传输中使用的波长应该不同于MB。采用正交相移键控-正交频分复用（QPSK-OFDM）调制格式，使用5个外核和10个波长，聚合DS容量达到250 Gb/s，并且使用16个QAM-OFDM调制的20个波长，聚合DS容量可以进一步扩展到1 Tb/s。对于US传输，仅使用低带宽RSOA就可以实现2.5 Gb/s的QPSK-OFDM传输，并且将自适应调制应用于RSOA以进一步将US数据速率提高到3.12 Gb/s。作为高速MB传输的仿真，48 Gb/s同相和正交（IQ）调制的普及分复用（PDM）-QPSK信号在MCF的内核中传输，并在奥尔特侧进行相干检测。DS和US光信号都表现出可接受的性能，具有足够的功率预算。
We proposed and experimentally demonstrated a wavelength-space division multiplexing (WSDM) optical access network architecture with centralized optical carrier delivery utilizing multicore fibers (MCFs) and adaptive modulation based on reflective semiconductor amplifier (RSOA). In our experiment, five of the outer cores are used for undirectional downstream (DS) transmission only, whereas the remaining outer core is utilized as a dedicated channel to transmit upstream (US) signals. Optical carriers for US are delivered from the optical line terminal (OLT) to the optical network unit (ONU) via the inner core and then transmitted back to the OLT after amplification and modulation by the RSOA in the colorless ONU side. The mobile backhaul (MB) service is also supported by the inner core. Wavelengths used in US transmission should be different from that of the MB in order to avoid the Rayleigh backscattering effect in bidirectional transmission. With quadrature phase-shift keying--orthogonal frequency-division multiplexing (QPSK-OFDM) modulation format, the aggregation DS capacity reaches 250 Gb/s using five outer cores and ten wavelengths, and it can be further scaled to 1 Tb/s using 20 wavelengths modulated with 16 QAM-OFDM. For US transmission, 2.5 Gb/s QPSK-OFDM transmission can be achieved just using a low-bandwidth RSOA, and adaptive modulation is applied to the RSOA to further enhance the US data rate to 3.12 Gb/s. As an emulation of high-speed MB transmission, 48 Gb/s in-phase and quadrature (IQ) modulated popularization division multiplexing (PDM)-QPSK signal is transmitted in the inner core of MCF and coherently detected in the OLT side. Both DS and US optical signals exhibit acceptable performance with sufficient power budget.