级联MZM型高消光比信号产生装置的实现与验证

摘要

消光比是表征光发射机传输性能的重要参数,在诸多国际标准中均有针对消光比的限制.消光比参数的校准一般通过标准源比对的方式,此方法关键在于建立稳定、可调消光比的光信号源,并能够产生尽可能大的消光比数值.本文实现了一种基于级联MZM结构的高消光比信号产生装置,能产生12.5 Gb/s以下速率可调的光数字信号,并能保持输出消光比在12 dB以上.%Extinction Ratio (ER) is the essential parameter which evaluates the transmission performance of an optical transmitter.Restrictions over ER are also found in international standards.Calibration on ER parameter is primarily implemented through direct comparisons according to the standard ER source.But the critical step is to establish a stable, ER-adjustable optical signal source, which can generate high ER as possible.This paper has implemented a novel structure of a high ER generator based on cascade Mach-Zender Modulator (MZM), which can generate data-rate-adjustable signal (12.5 Gb/s below), and maintain the output ER above 12dB.