基于载波抑制双边带的光纤微波频率传递系统优化  

Optimization of the optical fiber radio frequency transfer system based on double-sideband with carrier suppression

作　　者：孔梦雅 胡亮[1] 陈建平[1] 吴龟灵[1] KONG Mengya;HU Liang;CHEN Jianping;WU Guiling(State Key Lab of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《光通信技术》2022年第1期25-29,共5页Optical Communication Technology

基　　金：国家自然科学基金项目(61627817)资助。

摘　　要：针对采用分立器件实现载波抑制双边带(DSBCS)调制的被动补偿光纤环路微波频率传递方案的缺陷,对基于DSBCS调制的光纤环路微波频率传递系统进行稳定性优化设计和测试验证,设计了基于微波芯片的一体化接入节点电路,以腔体分隔的金属和高精度的温度控制模块屏蔽串扰、减小外界温度影响,实验测试了系统电路底噪、60 km光纤环路系统性能。测试结果表明:采用集成化的接入节点电路显著降低了系统电路底噪和1 m光纤传递底噪,在60 km光纤环路的20 km/40 km、40 km/20 km处输出频率的相对稳定度均优于4×10^(-14)/s、2×10^(-17)/day,长期稳定度比采用分立器件实现的节点电路时优化约一个量级。Aiming at the defects of passive compensation optical fiber loop radio frequency transfer scheme using discrete devices to realize double-sideband with carrier suppression(DSBCS)modulation,the stability optimization design and test verification of optical fiber loop radio frequency transmission system based on DSBCS modulation are carried out.An integrated access node circuit based on radio chip is designed to shield crosstalk and reduce the influence of external temperature with cavity separated metal and high-precision temperature control module.The system circuit bottom noise and 60 km optical fiber loop system performance are tested.The test results show that the integrated access node circuit significantly reduces the system circuit bottom noise and 1 m optical fiber transmission bottom noise.The relative stability of the output frequency at 20 km/40 km and 40 km/20 km of 60 km optical fiber loop is better than 4×10^(-14)/s and 2×10^(-17)/day.The long-term stability is about one order of magnitude better than that when the node circuit is realized by separate devices.

关 键 词：微波频率传递 载波抑制 优化 温度 电路底噪 

分 类 号：TN256[电子电信—物理电子学]