Hydrogen loading and UV-irradiation induced etch rate changes in phosphorus-doped fibers

F. D�rr, G. Kulik, H. G. Limberger, R. P. Salath�, S. L. Semjonov, E. M. Dianov
2004 Optics Express  
We show strong changes in chemical etching of phosphorusdoped fiber cores due to hydrogen loading and subsequent UV-irradiation using an atomic force microscope. The etch rate of the fiber core in a low concentration hydrofluoric acid solution (HF) is decreasing after hydrogen loading by as much as 30%. In contrast, UV-irradiation of the hydrogenated fiber increases the core etch rate to values of 27% above the etch rate of the pristine fiber. The UV-induced change in etch rate does not depend
more » ... te does not depend on pulse fluence, but only on total dose. We attribute the changes in etch rate to a hydrogen-and radiation-induced modification of color center population.
doi:10.1364/opex.12.005770 pmid:19488214 fatcat:zmhljibambb2dacc2tblyoeize