摘要
针对相位调制微波光子链路输出信号无法被光电探测器直接探测的问题,采用双平行相位调制器搭建微波光子链路,从而实现相位调制的直接探测。双平行相位调制器微波光子链路采用2个相位调制器,通过调节调制器的相位偏移差为π,使2路相位调制信号在接收端拍频时不会相互抵消,实现微波信号相位调制直接探测。采用光仿真软件Optisystem进行链路模拟仿真设计和性能分析,仿真结果表明:优化后的链路可有效传输相位调制信号,并具有结构简单和噪声小等优势。
As the output signal of the phase modulator can not be directly detected by PD,the dual-parallel phase modulators have been used to build microwave photonic links that can achieve direct detection.The dual-parallel phase modulators mi-crowave photonic links use two phase modulators.By setting the phase deviation difference between two PM asπ,two phase modulated signals do not cancelleach other at the receiving.Then the phase modulated signals can transmit in direct detec-tion.This paper analyzes the theory of the links and simulates the model of the links.The results of the simulation show this link can effectively transmit phase modulated signal to the receiver and has some features such as simple structure,low noise,etc.
出处
《桂林电子科技大学学报》
2014年第3期184-187,共4页
Journal of Guilin University of Electronic Technology
基金
广西自然科学基金(2013GXNSFGA019003)
广西教育厅科研项目(201202ZD041
201106LX177)
桂林市科学研究与技术开发计划(20120104-8
20130107-4)
中国博士后基金(2012M521127
2013T60566)
关键词
微波光子链路
强度调制器
相位调制器
相位偏移
探测
microwave photonic links
intensity modulator
phase modulator
phase deviation
detection
