摘要
MZM是一种电光晶体,是光矢量调制中一种重要器件。但MZM电光晶体自身特性参数会因为外部条件(温度等)和内部微结构(随时间)的改变而产生相应的变化,导致其传输曲线发生变化。因此要产生高质量的调制信号,就必须对MZM的偏置点偏移进行实时监测,并以此进行闭环的实时控制,补偿偏移。本研究首先对MZM直流偏置漂移的原因进行了数理分析,接着提出了一种MZM偏置电压的控制算法,该算法将输出功率的偏微分处理作为检测偏置点偏移的依据,具有不受输入光功率和前端插入损耗波动影响的优点。为验证理论的正确性,本研究进行初步的Matlab仿真,仿真结果表明:在输入光功率信号波动情况下,此算法依然有效。
MZM is an electro-optic crystal and an important device in optical vector modulation.However,the characteristic parameters of MZM electro-optic crystal will change with the change of external conditions(temperature,etc.)and internal microstructures(with time),resulting in the change of its transmission curve.Therefore,in order to produce high-quality modulation signals,it is necessary to monitor the offset of MZM in real time,and to compensate the offset in real-time closed-loop control.Move.Firstly,the reason of MZM DC bias drift is analyzed mathematically.Then a control algorithm of MZM bias voltage is proposed.The algorithm takes the partial differential processing of output power as the basis of detecting offset point drift,and has the advantage of not being affected by input optical power and insertion loss fluctuation of front end.In order to verify the correctness of the theory,a preliminary matlab simulation is carried out in this paper.The simulation results show that the algorithm is still effective under the fluctuation of the input optical power signal.
作者
王永塔
张爱兵
贺一峰
徐进
赵妍
周超
宫景丰
WANG Yongta;ZHANG Aibing;HE Yifeng;XU Jin;ZHAO Yan;ZHOU Chao;GONG Jingfeng(China Academy of Space Technology(Xi'an),710000)
出处
《空间电子技术》
2019年第6期28-32,共5页
Space Electronic Technology
关键词
偏微分
MZM
偏置电压
控制算法
激光通信
MZM
Mach Zeng De
Bias drift detection
Control algorithm
Laser communication
