Thakur Manoj P, Medeiros Maria C R, Laurêncio Paula, Mitchell John E
Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E-7JE, UK.
Opt Express. 2011 Dec 12;19(26):B457-68. doi: 10.1364/OE.19.00B459.
A novel optical dispersion tolerant millimetre-wave radio-over-fibre system using optical frequency tripling technique with enhanced and selectable sideband suppression is demonstrated. The implementation utilises cascaded optical modulators to achieve either an optical single sideband (OSSB) or double sideband-suppressed carrier (DSB-SC) signal with high sideband suppression. Our analysis and simulation results indicate that the achievable suppression ratio of this configuration is only limited by other system factors such as optical noise and drifting of the operational conditions. The OSSB transmission system performance is assessed experimentally by the transport of 4 WiMax channels modulating a 10 GHz optical upconverted RF carrier as well as for optical frequency doubling and tripling. The 10 GHz and tripled carrier at 30 GHz are dispersion tolerant resulting both in an average relative constellation error (RCE) of -28.7 dB after 40 km of fibre.
展示了一种新型的耐光色散毫米波光纤无线系统，该系统采用光频三倍频技术，具有增强的和可选择的边带抑制功能。该实现方案利用级联光调制器来实现具有高边带抑制的光单边带（OSSB）或双边带抑制载波（DSB-SC）信号。我们的分析和仿真结果表明，这种配置可实现的抑制比仅受其他系统因素（如光噪声和工作条件漂移）的限制。通过传输调制10 GHz光上变频射频载波的4个WiMax信道以及进行光频倍频和三倍频，对OSSB传输系统性能进行了实验评估。10 GHz载波和三倍频后的30 GHz载波具有耐色散特性，在经过40 km光纤传输后，平均相对星座误差（RCE）均为-28.7 dB。
