研制了一种用于宽带波导放大器的掺铒碲钨酸盐激光玻璃材料,对玻璃热稳定性、光谱性质进行了表征,并在其上采用离子交换法制作了平面光波导.掺铒碲钨酸盐玻璃的转变温度Tg和析晶开始温度Tx分别为377.1和488.5℃;荧光半高宽为52nm;应用McCumber理论,计算得出Er3+离子4I13/2→4I15/2跃迁在峰值波长1532nm的受激发射截面为0.91×10-20cm2. 不同条件下制作了在632.8nm处多模的平面光波导,通过拟合得到Ag+离子在300℃的有效扩散系数De为2.82×10-16μm2,活化能Q为149.7kJ/mol.研究结果表明掺铒碲钨酸盐玻璃具有较好的热稳定性、优良的光谱性能和离子交换性能,有望成为宽带放大的集成光学材料.
Er3+-doped tungsten-tellurite glass for broadband waveguide amplifier application was fabricated and characterized by the thermal stability, spectroscopic properties and ion exchange property. The
glass transition temperature Tg and crystallization onset temperature Tx are 377.1 and 488.5℃, respectively. The fluorescence spectrum indicates that the fluorescence width
at half maximum (FWHM) is 52nm. Calculated by McCumber theory the peak stimulated emission cross section of Er3+ from the upper level 4I13/2 to the ground level 4I15/2 is 0.91×10-20cm2.
Multi modes at 632.8nm were detected in Er3+-doped tungsten-tellurite glass, and the fitting effective diffusion coefficient De of Ag+ ion at 300℃ and the activation energy Q were calculated to be 2.82×10-16μm2 and 149.7kJ/mol, respectively. The results show that Er3+ doped tungsten-tellurite glass is a prospective candidate for broadband integrated optical
amplifier materials.
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