Investigation on modal noise in ZBLAN fiber

Abstract

The problem of modal noise is often encountered in high resolution spectrograph and in high speed communication fiber links. The experimental approach proved to be a deep mean of investigation of this problem, and it is a good starting point to try to understand and attenuate this source of noise. Through the observation of the spectrum image of known light source, and the comparison between a set of spectrum images, the modal noise has been clearly highlighted.