The Influence Of The Vitreous Matrix For The Determination Of The Lanthanides Doping Concentration From The Optical Transmission Spectra

In contrast with transitional metals whose spectra and color depends a lot of the ligands strength field, the sensitivity of the rare earth spectra is significantly weaker. This is the reason why the color of these ions is the same whatever the basic vitreous matrix. These properties permit to establish a relation fo the determination of the concentration off these ions in vitreous matrix directly formt he optical transmission spectra. The paper presents some samples of silica and phosphate glasses with lanthanides content for non-linear optical applications synthesised at a laboratory scale. VIS-NIR transmission curves are presented, for several compositions. For the corelation of then lanthanides content with the specific optical absorption peak one used a method strating from the Lambert - Beer Law.