Results are presented of experimental spectropolarimetric investigations of
multimode fiber-optic waveguides with core diameters between 65 and 404 mu
m in the infrared (0.8, 1.3, and 1.55 mu m). A theoretical explanation is
proposed for the results. (C) 1998 American Institute of Physics. [S1063-78
50(98)01412-8].