Preparation And Optical Spectroscopy Of Multi-component Oxide Glasses Doped With Er～(3+) Ions

Materials with light amplification is a main part of light amplifier, which determine the power efficiency and flat gain bandwidth of light amplifier. In this paper the mechanism of light amplification and the preparation based on multi-component oxide glass doped with Er3+ ions have been reviewed, including the factors which influence the efficiency of light amplification, such as concentration quenching for Er3+, solubility of Er3+ ions in multi-component glasses, the 4Ii3/2--> 4I15/2 transition strengths and bandwidths for Er3+ doped glasses in 1550nm gaining band.High erbium doped multi-component oxide glasses and Yb3+-Er3+-codoped lithium silicate glass for optics amplifiers were fabricated by the technique of high-temperature melting. Absorption from the 4I15/2 ground state, emission spectra under the excitation of 976nm laser diode have been performed at room temperature on these materials. The intense emission peak is located at 1.5399m, and the full-width at half-maximum (FWHM) is ~50nm, corresponding to the 4I13/2-->4I15/2 transition of the Er3+ ion, when the Er3+:Yb3+-doped concentration are 2.41 xl020 ions/cm3 (0.5mol %)and 2.17xl021 ions/cm3(4.5mol %), respectively. Li+-Na+ion exchange experiment on EY-6 glass indicate the glass has perfect ion exchange capacity. Oscillator strengths (f) measured from the absorption spectra have been analyzed using the Judd-Ofelt theory to evaluate the three intensity parameters (=2,4,6). The infrared luminescent property of Er3+have been calculated .The results indicate that lithium silicate glass (EY-6) is an attractive material for 1.55/im gradient refractive index optical amplifiers, because it exhibits a high solubility for Er3* and Yb3+ ion, wide-band tenability, superior ion exchange capacity.