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glossary
Fiber optic: long cylindrical optical component guiding light
Multimode fiber optic: fiber optic enabling the propagation of several transverse modes
Single mode fiber optic: fiber optic enabling the propagation of only one transverse mode ( the fundamental mode )
Cutoff wavelength: wavelength above which a fiber optic is single mode and below which it is multimode
Refraction index: for a transparent medium, ratio between the light speed in the air and the light speed in the medium ; for a reflective surface in the air or vacuum, the refraction index is « - 1 »
Core: central part of a fiber optic in which lightwaves are guided
Cladding ( fiber optic ): part of a fiber optic surrounding the core
