Answers are grounded in this paper and cite their sources.
For measuring reproducibily the baseband frequency response of a graded-index fibre, a mode exciter utilising an ordinary step-index multimode fibre has been proposed. The input mode power distribution and the frequency response of the fibre with the exciter are altered very little for axis offset. Input mode distribution excited indicates that excitation of nearly all modes takes place.
No takes yet. Share an insight, caveat, or question.
Tanifuji et al. (1979) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: