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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。本套测量装置具有位移测量准确，系统稳定度高和自动化程度高等优点。对一系列光纤样品所作的测试与连续变孔径法（远场法）测量值的比对表明，两者符合在３％以内
The measuring principle, measuring device and measuring result of measuring mode field diameter of single-mode fiber by transverse shift method are discussed. This method is one of the recommended mode-measuring single mode fiber mode-field diameter by CCITT. This set of measuring device has the advantages of accurate displacement measurement, high system stability and high degree of automation. A comparison of the measurements made with a series of optical fiber samples with the continuous variable aperture method (far-field method) shows that both are within 3%