Title :
Second order distortion in Er-doped fibres
Author :
Povlsen, J.H. ; Bjarklev, A. ; Rasmussen, T. ; Rottwitt, Karsten
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
It is shown that AM signals introduce travelling inversion waves in the Er-doped fibre amplifier. A formula for the induced distortion is found. Especially for Er-doped fibres with high numerical aperture the distortions may reach magnitudes which are problematic in relation to AM-FDM optical video links.
Keywords :
amplitude modulation; erbium; fibre lasers; frequency division multiplexing; optical communication equipment; optical links; optical modulation; video signals; AM signals; AM-FDM optical video links; Er-doped fibre amplifier; analogue optical links; induced distortion; numerical aperture; second order distortion; travelling inversion waves;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921152
