论文部分内容阅读
主要研究基于IQ光调制器的16进制正交振幅调制(16-QAM)光发射机中多偏置电压反馈控制性能,着重分析了装置内部两个马赫曾德尔调制器(MZM)的偏置电压与马赫曾德尔干涉仪(MZI)的偏置电压之间的协同控制问题,以及以光发射机的平均输出光功率作为反馈控制两个MZM偏置电压的监测信号所面临的多极值问题。研究证明了当MZM偏置电压处于传输曲线的最低点时监测的输出光功率为极值,且不受MZI偏置电压的影响。分析发现,合适的驱动信号幅度可保证两个MZM偏置电压的反馈控制过程中不存在多局部极值问题。
In this paper, the multi-bias voltage feedback control performance of 16-QAM optical transmitter based on IQ optical modulator is mainly studied. The bias of two Mach-Zehnder modulators (MZM) Voltage and Mach-Zehnder Interferometer (MZI), and the multi-extremum problem faced by using the average output optical power of the optical transmitter as feedback to monitor the monitoring signals of two MZM bias voltages . The research proves that when the MZM bias voltage is at the lowest point of the transmission curve, the monitored output optical power is extreme and is not affected by the MZI bias voltage. The analysis shows that the proper driving signal amplitude can ensure that there is no multi-local extremum problem in the feedback control of two MZM bias voltages.