Double clad aluminosilicate optical fibre doped with $\mbox{\sffamily\bfseries Nd}^{\hbox{\sffamily\bfseries\fontsize{12}{12}\selectfont 3+}}$ ions

Abstract.

Double clad aluminosilicate optical fibre doped with neodymium ions was obtained. Aluminosilicate glasses with low silica (25 mol%) content possess very good optical, thermal and mechanical properties. Simultaneously they are characterized by high solubility of rare earth elements. A set of physical measurements including: DTA, DSC, DL analysis, absorption spectroscopy and thermo-physical properties (thermal stability parameters, refractive index, thermal expansion coefficient, microhardness, density and molar volume) were determined. Double-crucible drawing technique was applied to obtain neodymium doped double clad optical fibre with ${\rm NA}\kern-2pt =\kern-2pt 0.12$. Luminescence spectra of aluminosilicate glass and fibre doped with Nd^{3 +} ions are presented.