Optical transmission fiber and manufacturing method thereof

Abstract

An optical transmission fiber (10) for transmitting a laser beam (S0) generally has at least one fiber core (1), at least one fiber sheath (2, 3) and a fiber sheath (2 , 3) the coating layer (5), wherein an intermediate layer (4) is provided between the fiber sheath (2, 3) and the coating layer (5), and the refractive index of the intermediate layer is smaller than the refractive index of the corresponding fiber sheath (2, 3) in contact with said intermediate layer (4). In this case, the fiber ( 10 ) is configured with at least one outcoupling device ( 11 ).

Description

Optical transmission fiber and manufacturing method thereof technical field The invention relates to an optical fiber according to the preamble of claim 1 as well as a method for producing an optical fiber and a method for bonding an optical fiber. Background technique Optical fibers are used as transmission fibers for transmitting light. The transmission of particularly high-intensity laser power is carried out by means of such fibers, for example in material processing (high-power applications) for processing heads. In this case, only a part of the fiber (the core) conducts light with the desired properties, while the sheathing layer realizes the optical frame conditions and the mechanical stability of the fiber for its specific use. However, in particular when coupling light into fibers and at transitions between fibers, for example at connectors or splices, so-called scattered beams from the core enter the sheathing layers, in particular the so-called cladding. )mid...

AI Technical Summary

Problems solved by technology

Poor beam quality is precisely in single-mode fibers and is a big problem for applications that require very good beam quality, such as laser cutting

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