基于平衡探测的RoF系统的毫米波研究

Research of millimeter wave in RoF system based on the balanced detection

通过理论建模,在中心站利用法布里-珀罗(F-P)滤波器从可调谐激光器中滤出两束相位近似相等的相干光,经过2×2光纤耦合器耦合之后,在基站利用两个光电探测器进行平衡探测产生了毫米波信号。经仿真对比,相位噪声和系统强度噪声得到了极大的改善。

Through the theoretical modeling,two beam phase approximately equal coherent light are filtered from tunable laser by fabry-perot（F-P） filter in the central station.After 2×2 fiber coupler,millimeter wave signal are produced in base station using two photoelectric detector with balance detection.The simulation results show that phase noise and system intensity noise have been greatly improved.