摘要
针对微波光子链路在实际应用中信号相位受光纤温度变化产生的波动,利用检波器矢量和原理检测微波信号的相位偏差量,并设计了信息处理模块控制可调谐电移相器进行精准的相位补偿,实现微波信号的相位稳定传送。在理论模型的基础上,实验测试了温度变化对微波光链路相位的影响,并构造了微波稳相光传输系统,使用25 km的标准单模光纤传输10 GHz微波信号,对系统输出信号进行了长时间测量,相位波动稳定控制在±2°以内,实验结果验证了该方案的可行性。
Aiming at the fluctuation problem of the signals phase in microwave fiber-optic system affected by the tempera- ture change of optical fiber, an information processing module is designed to control tunable phase shifter for precise phase com- pensation. Thus the phase-stable transmission of microwave signals is achieved by using the principles of vector sum to detect a phase deviation of the microwave signal. Based on the theoretical model, the influence of temperature variation on the phase in- formation of microwave optical link is experimented and tested, and the microwave phase-stable optical transmission system is structured. 10GHz microwave signals are transmitted with 25km standard single-mode fiber for a long time, the test result show that the phase fluctuations is stable controlled within ±2°, thus the feasibility of the scheme is demonstrated.
出处
《现代电子技术》
2014年第3期42-44,48,共4页
Modern Electronics Technique
关键词
微波光子学
光纤链路
相位稳定
矢量和
microwave photonics
optical fiber link
phase stability
vector sum
