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Measurement of intermodal dispersion in a twin-core optical fibre
Peterka, Pavel ; Kaňka, Jiří ; Honzátko, Pavel
The intermodal dispersion (IMD), that arises from the difference of group delays of the two fundamental modes of the twin-core fibre (TCF), could have a detrimental effect for usage of TCF in high-speed applications. Therefore, its accurate determination is of a high interest. We have estimated the IMD from the fibre refractive index profile and we have determined it from the interference pattern in spectral domain and from the repetition rate of passively mode-locked fibre laser incorporating TCF.

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