Measurement of intermodal delay in a dual-mode optical fibre

24 October 1985

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 21 (22) , 1031-1033
https://doi.org/10.1049/el:19850732

Abstract

A novel measurement technique for intermodal dispersion between the LP₀₁ and LP₁₁ modes of a dual-mode optical fibre is described. A frequency-modulated optical source produces a beat frequency, proportional to intermodal delay, by interference of the two modes at the fibre output. Experimental results agree with theoretical predictions.

Keywords

FREQUENCY-MODULATED OPTICAL SOURCE
LP11 MODES
DUAL-MODE OPTICAL FIBRE
INTERMODAL DELAY
MODE INTERFERENCE
INTERMODAL DISPERSION
MEASUREMENT TECHNIQUE
LP01 MODE
BEAT FREQUENCY

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