Spatial beam reshaping and large-band nonlinear conversion in rectangular-core phosphate glass fibers

Abstract

Here we present the ability of Nd³⁺-doped zinc-phosphate glasses to be shaped into rectangular core fibers. At first, the physico-chemical properties of the developed P₂O₅-based materials are investigated for different concentrations of neodymium oxide and core and cladding glass compositions are selected for further fiber development. A modified stack-and-draw technique is used to produce multimode large rectangular-core optical fibers. Self-guided nonlinear effects acting as spatial beam reshaping processes occurring in these newly-developed photonic structures lead to the generation of spectral broadenings in the visible and near-infrared spectral domains.

Graphical abstract

Keywords

Phosphate glasses / Neodymium / Optical fibers / Self-focusing / Super-continuum

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