The principles and devices of the offset joint method for the measurement of mode field diameter of single mode fibers, which is one of the recommendations by CCITT, are described, and the experimental results are presented.

• 论述了用横向错移法测量单模光纤模场直径的测量原理、测量装置和测量结果，该方法是国际电信电报咨询委员会（CCITT）所推荐的单模光纤模场直径测量方法之一。