tailieunhanh - Structure and Physico-Chemical properties of silica gels doped with optically activated Er3+ ions by Sol-Gel process

This paper is devoted to the study of the relationship between structure and optical properties of silica glasses doped with optically active Er3+ ions and reported the influence of the suitably selected heat treatment on the optical properties of silica glasses. The physico-chemical properties of Er3+doped silica are presented, which has been related with the effects of hydroxyl groups on the luminescence property of Er3+ in the host matrix of silica. | Journal of Chemistry Vol. 45 1 P. 114 -119 2006 STRUCTURE AND PHySICO-CHEMICAL PROPERTIES OF SILICA GELS DOPED WITH OPTICALLy ACTIVATED Er3 IONS by SOL-GEL PROCESS Received 7 July 2005 NGUyEN VIET LONG1 DU THI XUAN THAO2 NGUyEN Duc CHIEN3 PHAM THANH BINH4 international Faculty of Higher Education Teaching Posts and Telecommunications Ins. Tech. 2University of Mining and Geology institute of Engineering Physics HUT international Training Institute of Materials Science ITIMS HUT SUMMARy This paper is devoted to the study of the relationship between structure and optical properties of silica glasses doped with optically active Er3 ions and reported the influence of the suitably selected heat treatment on the optical properties of silica glasses. The physico-chemical properties of Er3 doped silica are presented which has been related with the effects of hydroxyl groups on the luminescence property of Er3 in the host matrix of silica. I - INTRODUCTION The development of new photonic materials has been studied for the purpose to generate guide switch multiplex and amplify light which has become very necessary in many areas in photonic technology such as high power fiber solid state lasers. To date Er3 -doped silica is one of the most attractive and potential photonic materials for Er3 -doped fiber amplifiers EDFA . Moreover sol-gel technology has been used to incorporate erbium ions into silica gel. Specially trivalent erbium is characterized by an optical transition at pm an important standard wavelength in optical telecommunication which is utilized for optical amplification to compensate the loss of information signal occurring in the longdistance transmission networks 1 . The main problems that influence the optical performance of sol-gel method-based devices are the none-radiative relaxation channels due to rare earth concentration quenching and vibrations of the OH groups 2 - 3 . However the relationships between the structure and physico-chemical properties .