Accurate Measurement Of Multimode Bandwidth In The Frequency Domain

The purpose of this paper is to describe the accurate measurement of multimode bandwidth from a system measurements standpoint. The parameter of multimode bandwidth is probably the most difficult measurement to acheive. To describe the measurement, basic theory of multimode fiber waveguide propagation will be discussed. Types of measurement methods to measure multimode bandwidth will be discussed. This paper will explain why the frequency domain measurement method is an acceptable technique. The measured swept frequency bandwidth data for 50 micron 0.2 N.A. fiber will be compared to a reputable master reference bench, and differences in the results will be shown to be insignifigant. Finally, conclusions will be given.