Heterogeneous radio-over-fiber passive access network architecture to mitigate Rayleigh backscattering interferometric beat noise.
Heterogeneous radio-over-fiber passive access network architecture to mitigate Rayleigh backscattering interferometric beat noise.
复制标题
DOI：
10.1364/oe.19.005735
复制
发表时间：
2011-03
期刊：
影响因子：
3.8
通讯作者：
C. Yeh;C. Chow
中科院分区：
文献类型：
--
作者：
C. Yeh;C. Chow
我们提出并实验证明了一种混合无线电光纤（ROF）波分复用和时分复用无源光网络（WDM-TDM PON）的架构，以减轻瑞利后向散射（RB）干涉拍噪声。这里，在中心局（CO）处仅需要单个波长来生成用于光有线应用的下行基带数据和用于无线应用的光毫米波（mm波）信号。上行信号通过对下行信号进行再调制而产生。在光网络单元/远程天线单元（ONU/RAU）处不需要光学滤波器来分离光学有线和光学mm波信号。在所提出的网络中，10 Gb/s差分相移键控（DPSK）信号用于下游光有线应用，20 GHz载波上的2.5 Gb/s开关键控（OOK）信号用于光毫米波信号。在每个ONU中，反射式光半导体放大器（RSOA）用于重新调制并产生用于上行业务的2.5Gb/s OOK格式。由于下行DPSK信号和上行OOK信号产生的后向反射在不同的光纤路径中传播，因此可以完全减轻CO处的RB噪声。
We propose and experimentally demonstrate a hybrid radio-over-fiber (ROF) wavelength division multiplexed and time division multiplexed passive optical network (WDM-TDM PON) architecture to mitigate Rayleigh backscattering (RB) interferometric beat noises. Here, only a single wavelength is needed at the central office (CO) to generate the downstream baseband data for optical wired application and optical millimeter-wave (mm-wave) signal for wireless application. The upstream signal is produced by remodulating the downstream signal. No optical filter is required at the optical network unit/remote antenna unit (ONU/RAU) to separate the optical wired and optical mm-wave signals. In the proposed network, 10 Gb/s differential phase shift keying (DPSK) signal is used for the downstream optical wired application and 2.5 Gb/s on-off keying (OOK) signal on 20 GHz carrier is used for the optical mm-wave signal. In each ONU, a reflective optical semiconductor amplifier (RSOA) is used to remodulate and produce a 2.5 Gb/s OOK format for upstream traffic. As the back-refection produced by the downstream DPSK signal and the upstream OOK signal is traveling in different fiber path, RB noise at the CO can be completely mitigated.