Method of measuring time delays with respect to Differential Mode Delay, DMD, of a multi-mode fiber, MMF, or a few-mode fiber, FMF.

摘要

A method of measuring time delays with respect to Differential Mode Delay, DMD, of a multi-mode fiber, MMF, or a few-mode fiber, FMF, for at least two different wavelengths in a measurement arrangement, said measurement arrangement comprising a laser device arranged to emit laser pulses at said at least two different wavelengths, a single mode fiber, SMF, arranged to couple emitted laser pulses into said MMF or said FMF, a first component arranged to couple laser pulses emitted by said laser device into said SMF, a second component arranged to align said SMF to said MMF or said FMF, a detector module arranged for detecting emitted laser pulses exiting said MMF or FMF, and a third component arranged to couple said emitted laser pulses exiting said MMF or said FMF to said detector module.