A comparison of three bandwidth measurement techniques for multimode optical fibers

The results of an experiment comparing three distinct methods of measuring the bandwidth of a telecommunication grade multimode optical fiber are presented. The three methods are: (1) the time-domain method; (2) the frequency-domain method; and (3) the pulse-spectrum analysis method. Good agreement between the frequency-domain method and the pulse-spectrum analysis method was found,but the time-domain method yielded results that were lower than the other two for the cases considered.