铒激活重掺杂银硼酸盐玻璃光谱性质

制备了铒激活的重掺杂银硼酸盐玻璃样品,测量了该样品的吸收光谱、X射线衍射谱。研究结果表明样品中没有金属银簇或金属银纳米粒子存在。应用Judd-Ofelt理论计算了该玻璃中的Er³⁺离子的J-O 参数,计算了辐射跃迁几率、辐射跃迁寿命及⁴I_13/2能级的量子效率。发现银引入到硼酸盐玻璃后,降低了基质的声子能量,提高了基质的折射率,增加了Er³⁺的⁴I_13/2量子效率和发射截面积,从而增强了1.5 μm光发射。同时该玻璃样品1.5 μm光发射有较宽的半峰全宽,约为80 nm,但量子效率仍然较低。

Spectroscopic Properties of Er3+ Doped Borate Glass Containing More Silver

Recently, most of interest in luminescent rare-earth ions have concentrated on one species: trivalent erbium, in particular its emission band around 1.5 μm. Because the 1.5 μm is the wavelength for telecommunications,and trivalent erbiums emission band around 1.53 μm offered several advantages including the capability to produce gain at many different wavelengths simultaneously—a key requirement for wavelength division multiplexing (WDM). As for all amplifiers, broad emission cross sections are essential. Er³⁺-doped borate glass has broad emission cross-section. However, the high phonon energy prevents it from application for Er³⁺-doped fibre amplifier.In this paper, Er³⁺-doped borate glass containing high Ag⁺ contents was synthesized and their absorption spectra were measured. The results showed that no metal silver cluster exists in the glass and silver element was equably distributed into the glass as sliver ions. Judd-Ofelt parameters, radiative lifetimes as well as the quantum efficiency were calculated. It is found that introducing high content of Ag⁺ into Er³⁺ doped borate glass leads to an enhancement of the refractive index and reduces the phonon energy in glass host. As a result, the quantum efficiency and emission cross-sections increase, and the 1.5 μm emission intensity increases. Meanwhile, Er³⁺-doped borate glass containing high content of Ag⁺ shows the broad full width at half maximum (FWHM)of about 80 nm.