MULTIMODE OPTICAL FIBER WITH HIGH BANDWIDTH OVER AN EXTENDED WAVELENGTH RANGE AND CORRESPONDING MULTIMODE OPTICAL SYSTEM

摘要

The present invention relates to a multimode optical fiber having a refractive index profile having at least two α values and a graded refractive index co-doped with at least fluorine F and germanium GeO ₂ . According to the invention, the concentration of fluorine F at the core center ( ) Is 0 to 3 wt% and the concentration of fluorine F in the radius outside the core ( ) Is 0.5wt% to 5.5wt%, to be. For wavelengths comprised between 850 nm and 1100 nm, the multimode optical fiber has an overfield launch bandwidth (OFL-BW) of greater than 3500 MHz.km and a calculated effective greater than 4700 MHz.km over a continuous operating wavelength range of greater than 150 nm. Has a mode bandwidth (EMBc).