A method is presented to measure the transmission parameters （dispersion

MFD

cut off wavelength

non linear effective area and so on） of the match cladding single mode optical fiber synthetically.It depends on the curve of the index profile measured by a Refractive Index Profiler

and those parameters are calculated out through data processing and culculation.The new way of the data processing can provide high measurement accuracy.Comparing these calculations with measured results by instruments

the deviation is less than ±2 nm for zero dispersion wavelength λ 0

and less than ±0.2 μm for MFD.