基于波分复用的长距离射频光传输串扰研究

Research on Crosstalk in Long-Distance RF Optical Transmission Based on Wavelength Division Multiplexing

基于波分复用的多波长射频光传输系统能通过单根光纤传输多路射频信号,该技术被广泛应用于国防军事等领域中。在同一根光纤中传输时,由于光与光纤的相互作用会形成同频串扰。本研究通过搭建多通道波分复用的射频光传输系统,利用矢量网络分析仪来测量通道间的串扰。结合已有的理论对通道间的串扰进行仿真研究,并对受激拉曼散射和交叉相位调制形成的串扰进行计算,理论仿真与测试符合较好。对该串扰的测量与形成机制的分析可指导实际射频光传输的信号频率与光波长的分配。

The multi-wavelength RF optical transmission system based on wavelength division multiplexing can transmit multiple RF signals through a single fiber.This technology is widely used in defense and military fields.When propagating in the same fiber,the same frequency crosstalk will be formed due to the interaction between light and fiber.In this study,by building a multi-channel wavelength division multiplexing RF optical transmission system,vector network analyzer is used to measure the crosstalk between channels.Combined with the existing theory,the crosstalk between channels is simulated,and the crosstalk formed by stimulated Raman scattering and cross-phase modulation is calculated.The theoretical simulation and test are in good agreement.The analysis of the measurement and formation mechanism of this crosstalk can guide the distribution of signal frequency and light wavelength in actual RF optical transmission.