掺铒碲-钨-钠玻璃基质的光谱性质研究

Spectroscopic Properties of Er 3^(+)-Doped TeO_2-WO_3-Na_2O Glasses for Ion-Exchanged Waveguide Devices

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Er3+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Er3+离子在1.5μm的受激发射截面,荧光测试发现Er3+离子的荧光半峰全宽可达65 nm。比较了Er3+离子在不同玻璃基质中的光谱特性。结果表明,Er3+ 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&rarr4I15/2 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.