Abstract:
The development of single mode fibre lasers and amplifiers, due to the wide area of applications, is the topic of great interest. We present nanostructurization, the new ...Show MoreMetadata
Abstract:
The development of single mode fibre lasers and amplifiers, due to the wide area of applications, is the topic of great interest. We present nanostructurization, the new method applied within the fibre core to control precisely optical properties of the active fibre. The nanostructured core is composed of two or more kind of glasses with the size of a fraction of the light wavelength. The glass areas are made with glass rods creating the structure, repetitive along the fibre. The refractive index of that kind material can be treated as a compound of refractive indices of each glass area averaged over a certain neighbourhood inside the material. It results in continuous-like refractive index profile according to the design, which can be described with effective medium theory. The nanostructurization opens new opportunities for development of fibres with a core composed of glasses doped with active or photosensitive ions. It allows to control precisely not only the refractive index distribution, but also the active dopants distribution or photosensitivity distribution in the fibre core, providing perspectives for novel optical fibre designs for laser applications. We introduce recent developments of nanostructured core fibres made of ytterbium doped phosphate and silica glass. Active fibres with additional germanium dopants are also reviewed.
Date of Conference: 09-13 July 2019
Date Added to IEEE Xplore: 19 September 2019
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