Characterization of multi-clad fibers: approaches to measure the beam divergence angle and its degradation in the fiber
Dörte Schönfeld,
Daniel Reul,
Philipp Raithel
et al.
Abstract:Multi-cladding (MC) fibers with undoped silica core and alternating highly fluorine doped and undoped silica cladding layers are a new standard for high power laser beam transmission. Such MC-fibers allow tailoring the output beam profile of a single laser source to the desired application.An important factor for these applications is to avoid additional scattering of the guided light in the different regions leading to an increased output divergence, so-called focal ratio degradation (FRD).In this work, we co… Show more
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