Multi-mode fiber optic, methods for transmitting radiation in high power along an optical fibre and for optimizing the refractive index profile of an optical fiber and optical cable.

摘要

The present invention relates to a multimode optical fiber (99) for continuous transmission of electromagnetic radiation in high power.The said fiber defining a geometrical axis of fiber and comprising a core (110) and a coating (120) surrounding the core.And in that the multi-mode fiber optic fiber is a gradual index multi-mode fiber refractive index profile in the following essentially the formula (1), where the formula (a),? R is the distance from the geometric axis of the fiber. N (R) is the nominal refractive index as a function of distance from the geometric axis of the fiber.? N1 is the refractive index in the geometric axis nominal fiber? N2 is the refractive index of the cladding,? A is the radius of the core, and? G is a parameter that defines the shape of the profile.? Where the diameter of the core 2a is between 90 m and 190 u00b5 m,? The parameter g is between 1.2 and 1.8, and the numerical aperture (NA) of the fiber, where the formula (b),Is between 0.2 and 0.3.