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SPECTRAL AND LUMINESCENT PROPERTIES OF GLASSES DOPED WITH ERBIUM IONS BASED ON 98MgCaSrBaYAl2F14-2Ва(РО3)2

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The article is devoted to spectral and luminescent properties of glasses of 98MgCaSrBaYAl2F14-2Ва(PO3)2 composition with ErF3 content 0; 0.1; 0.5 and 1.0 mol.%. Samples of glasses were prepared by high-temperature synthesis in an argon atmosphere. It was found that the matrix of fluoroaluminate glass, has a wide spectral transparency range from 0.2 to 6.7 μm, which indicates the great practical importance of the glassy composition under study as a material for optoelectronics devices. From the infrared transmittance spectra, absorption bands were identified, due to the presence of hydroxyl and phosphate groups, the maxima of which are about 3.0 and 4.7 μm, respectively. It has been established that the fluoroaluminate glassy matrix has a relatively low content of impurities of OH groups. For the samples doped with erbium upon excitation with a wavelength of 487 nm the luminescence spectra were obtained in the spectral range 500–900 nm. The nature of these bands is explained on the basis of a simplified energy diagram of erbium ion in a glassy matrix. Analysis of the concentration dependences of the integral intensities of the luminescence bands was also carried out, in the course of which it was found that a sample containing 0.1 mol. % ErF3 has the maximum efficiency. The 2H11/2→4I15/2 radiative transition was found to be the one mostly exposed to concentration quenching.

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