基于MZ调制器工作点控制的前端电路设计  

Front Control Circuit Design of the Working Point of MZ Modulator

作　　者：王晓丽[1] 陈福深[1] 孙豹[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都611731

出　　处：《半导体光电》2013年第1期145-147,共3页Semiconductor Optoelectronics

摘　　要：设计了马赫-曾德尔(MZ)调制器工作点控制的前端电路。利用运放OP27设计文氏桥电路,产生1kHz余弦波,作为扰动信号加到MZ调制器的RF端。运用运放OP27设计带通滤波器,从探测器分别提取一次谐波和二次谐波。利用乘法器MLT04实现对一次谐波和二次谐波的检波,分别得到一次谐波的幅度调制信号和二次谐波的幅度调制信号。这两个调制信号含有调制器工作点的相位信息,为后续的软件控制提供了两路含有相位信息的信号,使整个控制系统的实现更准确。The front control circuit of the working point of MZ modulator is designed. OP27 is used to design Wien bridge circuit to generate 1 kHz cosine wave, and the 1 kHz cosine wave will be added to RF of MZ modulator as a disturbance signal. Band-pass filter designed by OP27 extracts a harmonic and the second harmonics. The modulated signals of a harmonic and the second harmonics are achieved by multiplier MLT04. The modulated signals contain phaseshift information of the working point of MZ modulator, providing two road signals containing phase-shift information of the working point of MZ modulator and making the whole control system more accurate.

关 键 词：MZ调制器 工作点 扰动信号 滤波器 乘法器 

分 类 号：TN108.7[电子电信—物理电子学]