掺铒碲-钨-钠玻璃基质的光谱性质研究

制备了用于离子交换法制备光波导器件的掺铒碲-钨-钠玻璃基质。应用扎得-奥菲而特(Judd—Ofelt)理论计算了玻璃样品的三个强度参量，由强度参量计算了Er^3+离子的自发跃迁几率、荧光分支比等光谱参量；应用麦克库玻(McCumber)理论，计算了Er^3+离子在1．5μm的受激发射截面，荧光测试发现Er^3+离子的荧光半峰全宽可达65nm。比较了Er^3+离子在不同玻璃基质中的光谱特性。结果表明，Er^3+离子在碲-钨-钠玻璃中具有较高的受激发射截面和较宽的荧光半峰全宽，可以用于宽带光波导器件的制备。

A New Er3+-doped TeO2-WO3-Na2O glass for ion-exchanged waveguide devices has been fabricated and characterized. The measured absorption and emission spectra of the glass were analyzed by the Judd-Ofelt and McCumber theories. The intensity parameters are Ω2=7.01×10-20 cm2, Ω2=1.80×10-20 cm2, Ω2=1.03×10-20 cm2. The glass has high and broadband absorption and stimulated emission cross-sections at 1.5 μm. The maximum emission cross-section is 0.91×10-20 cm2 at 1.533 μm, and a broad 1.5 μm emission spectrum of 65 nm full width at half maximum (FWHM) is demonstrated. Emission properties for 4I13/2→4I15/2 transition of Er3+ in different glasses are compared with each other. It is indicated that Er3+-doped TeO2-WO3-Na2O glasses will be a promising candidate for broadband ion-exchanged waveguide devices.