The Preparation And Performance Characterization Of Cr/Tm/Ho Co-doped Fluorophosphate Glass

In recent years, due to the potential broad applications in the field of laser technique, laser glass has a rapid development and gives an impulse to the improvement of laser, also becomes an important kind laser material applied to high power and high energy laser, such as Ho3+-doped solid laser arising special attention recently.In this paper, the structure, the components and the process parameters of the host glass were devised , also the Fluorophosphate glasses doped rare earth ion with better laser performance were fabricated by high temperature melting in order to meet the require of the high power laser. Fluorophosphate glasses with various Al ((PO3)3 content were prepared , and their structure , thermal properties and spectral properties were studied. The spectra parameters of the glasses were calculated by the theory of Judd-Ofelt, and the absorption spectra were determined with Lambda 900UV/VIS/NIR Spectrometer, and the fluorescence spectra were obtained by Niclet-800 Fourier Transform infrared spectrometer, The emission properties at around 2.0μm in Cr3+/Tm3+/Ho3+ co-doped Fluorophosphate glasses with different mole fractions of Tm3+were studied. spectral strength parametersΩt(t=2,4,6) of those glasses have been calculated. Meanwhile, the spectral parameters including oscillator strength ,spontaneous emission probability and branching rations of Ho3+ have been calculated.The effects of the concentration of rare earth ion and glass construction on the spectra characteristic are displayed by the theoretical calculation and the performance analysis, and the materials applied for the Ho3+-doped fluorophosphate glasses are fabricated. The results indicate that absorption from the 5I8ground state, emission spectra under the excitation of 786nm laser diode have been performed at room temperature on these materials. The intense emission peak is located at 2.036μm, and the full-width at half-maximum (FWHM) is 96.2nm, corresponding to the 5I7→5I8 transition of the Ho3+ ion, when the Ho3+:Tm3+-doped concentration are 11.296×1019 ions/cm3 (0.5mol %) and 9.212×1020 ions/cm3 (4.5mol %), respectively. Oscillator strengths (f)measured from the absorption spectra have been analyzed using the Judd-Ofelt theory to evaluate the three intensity parameters ?t(t=2,4,6). The infrared luminescent property of Ho3+ have been calculated . furthermore, Fluorophosphate glasses glass (P8) is an attractive material for 2.0μm solid laser, because it exhibits a high solubility for Ho3+ and Tm3+ ion, wide-band tenability。...