High-Power Laser Fibre System
AssigneeThales
InventorsJean-Paul Pocholle, Francois-Xavier Doittau
Life of this patent
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Abstract
The invention relates a power fiber laser system including at least one single-mode fiber laser, emitting at a signal wavelength, the fiber including at least one outer cladding and a core, in which the core of the fiber has a radially graded index. The fiber includes, at least over a part of its length, a geometrical section having a graded fiber-core radius that decreases between an input end of the section and an output end of the section, the core radius and the index variation between the cladding and the fiber at the input end being such that the normalized frequency at the signal wavelength is less than the normalized cutoff frequency at which the fiber becomes unimodal.
Claims18
A power fiber laser system comprising at least one single-mode fiber laser, emitting at a signal wavelength, said fiber comprising at least one outer cladding and a core, wherein the core of said fiber has a radially graded index and comprises, at least over a part of its length, a geometrical section having a graded fiber-core radius that decreases between an input end of the section and an output end of the section, the core radius and the index variation between the cladding and the fiber at the input end being such that the normalized frequency at the signal wavelength is less than the normalized cutoff frequency at which the fiber becomes unimodal.
Dependencies are inferred from the claim text.