Wu Beilei, Zhu Ming, Xu Mu, Wang Jing, Wang Muguang, Yan Fengping, Jian Shuisheng, Chang Gee-Kung
Opt Lett. 2015 May 1;40(9):2103-6. doi: 10.1364/OL.40.002103.
A novel technique to simultaneously compensate dispersion-induced power fading for multi-service radio-over-fiber (RoF) links is proposed. At the central office (CO), a phase-coherent orthogonal lightwave generator (POLG) consisting of a polarization rotator (PR) and a single-driver Mach-Zehnder modulator (MZM) is used. By adjusting a polarization controller (PC) in the base station (BS), the phase difference between the orthogonal polarization carrier and two sidebands can be controlled, and the frequency response can be flexibly shifted for individual radio frequency (RF) service. We experimentally shift the destructive interference to the constructive interference at various frequencies for 25 km and 30 km fiber links. The performances of two services carrying 1 Gb/s on-off keying (OOK) data at 9 GHz and 16.6 GHz over a 30 km fiber in the proposed system show receiver sensitivity improvement of ∼12 dB at the bit error rate (BER) of 10(-3) compared with the conventional double sideband (DSB) modulation case.
提出了一种同时补偿多业务光纤无线（RoF）链路中色散引起的功率衰落的新技术。在中心局（CO），使用了一种由偏振旋转器（PR）和单驱动马赫-曾德尔调制器（MZM）组成的相位相干正交光波发生器（POLG）。通过在基站（BS）中调整偏振控制器（PC），可以控制正交偏振载波与两个边带之间的相位差，并且可以针对各个射频（RF）服务灵活地移动频率响应。我们通过实验将25 km和30 km光纤链路在各种频率下的相消干涉转换为相长干涉。在所提出的系统中，在30 km光纤上承载9 GHz和16.6 GHz的1 Gb/s开关键控（OOK）数据的两种服务的性能表明，与传统双边带（DSB）调制情况相比，在误码率（BER）为10^(-3)时，接收机灵敏度提高了约12 dB。
