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研究了一种基于高非线性光纤(HNLF)中交叉相位调制效应的全光频率上转换射频耦合到光纤无线通信(ROF)系统。数值计算结果表明,由于交叉相位调制引起的调制不稳定性,波长1.54μm,重复频率为40 GHz的抽运光可使波长为1.56μm,载有速率为2.5 Gbit/s的非归零码作为下行链路数据的弱信号光光波分裂,产生与载波距离为40 GHz且与载波相干的两个一阶调制边带,抽运光脉宽、抽运光功率和光纤长度对载波与边带功率差有较大影响。仿真实验结果证实了以上原理,速率为2.5 Gbit/s的数据信号在高非线性光纤中被上转换到40 GHz毫米波上。信号光功率为0 dBm时,得到的优化光纤长度为600 m,抽运光功率为17 dBm。
An all-optical frequency upconversion RF-coupling to optical fiber wireless communication (ROF) system based on the cross-phase modulation effect in highly nonlinear fiber (HNLF) was investigated. The numerical results show that due to the modulation instability caused by cross-phase modulation, the pump wavelength of 1.54μm and the repetition frequency of 40 GHz can make the wavelength of 1.56μm, and the non-return-to-zero code carrying the rate of 2.5 Gbit / s The weak signal light splitting of the downlink data generates two first-order modulation sidebands with a carrier distance of 40 GHz and coherence with the carrier wave, the pump pulse width, the pump light power and the fiber length to the carrier and sideband power Poor has a greater impact. Simulation results confirm that the above principle, the data rate of 2.5 Gbit / s is upconverted to 40 GHz millimeter wave in high nonlinear fiber. When the optical signal power is 0 dBm, the optimized optical fiber length is 600 m and the pump optical power is 17 dBm.