光模块接收无光监控异常的解决方法  

Solution of no light monitoring abnormality in optical module receiver

作　　者：程木海 高枫 CHENG Muhai;GAO Feng(Hymax Optoelectronics Co.,Ltd.,Zhangjiakou Hebei 075400,China)

机构地区：[1]河北华美光电子有限公司,河北张家口075400

出　　处：《光通信技术》2023年第4期38-41,共4页Optical Communication Technology

摘　　要：为了解决无光输入时光收发一体模块的接收监控有时会出现异常的问题,提出了一种精确选择跨阻放大器解耦电容和软件校准相配合使用的方法。首先,测试了监控异常时的I2C总线波形和接收电源噪声波形,验证了多种型号跨阻放大器和不同监控解耦电容值对接收监控的影响,确认了接收无光监控异常主要是由跨阻放大器监控残留噪声和监控电容解耦2个原因造成的;然后,通过实验选取合适的监控信号解耦电容,同时使用二阶方程进行软件校准。测试结果表明,该方法可以完全解决无光时的接收监控异常问题。In order to solve the problem of abnormal with reception and monitoring of the optical transceiver integrated module without optical input,a method of accurately selecting trans-impedance amplifier decoupling capacitors and using software calibration is proposed.First,the I2C bus waveform and receiving power noise waveform are tested in case of abnormal monitoring,and the impact of various types of trans-impedance amplifiers and different monitoring decoupling capacitor values on receiving monitoring are verified.It is confirmed that the abnormal receiving monitoring is mainly caused by two reasons:the trans-impeda-nce amplifier monitoring residual noise and monitoring capacitance decoupling.Then,select appropriate decoupling capacitor of the monitoring signal through experiments,and using the second-order equation for software calibration.The test results indicate that this method can completely solve the problem of receiving monitoring anomaly when there is no light inputting.

关 键 词：光纤通信 光电收发一体模块 监控校准电路噪声 

分 类 号：TN929.1[电子电信—通信与信息系统]