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首页> 外文期刊>Optical Materials >Sol--gel silica/titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 μm
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Sol--gel silica/titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 μm

机译：溶胶-凝胶二氧化硅/硅二氧化钛掺Er / Yb的波导，用于1.5μm的光放大

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摘要

By combining the sol--gel method and the spin-coating technique, silica-on-silicon Er-doped glass optical planar waveguides were fabricated. The active guiding layer consisted of SiO_2--TiO_2--Er_2O_3--Yb_2O_3--Al_2O_3 and its composition was optimized by measuring the fluorescence lifetime τ of the 4~I_l3/2 metastable level of Er~3- ions. The Er concentration was chosen as the quenching concentration, which was found to be l.4 x l0~20 ions/cm~3. The Yb concentration was found to have little influence on τ, whereas a concentration of l.5 x l0~21 ions/cm~3 of AlO_3/2 was found to be enough to maximize τ. The 7laluminum concentration barely influenced the flatness of the amplified spontaneous emission spectrum. Strip-loaded waveguides were designed by reactive ion etching of the cladding layer and their performance as candidates for integrated optical amplifiers was assessed. Propagation losses of 0.7 dB/cm and loss reduction of 2.7 dB (for a 5.7 cm long waveguide) were measured.
机译：通过结合溶胶-凝胶法和旋涂技术，制备了掺硅Er的玻璃光学平面波导。活性导向层由SiO_2--TiO_2--Er_2O_3--Yb_2O_3--Al_2O_3组成，通过测量Er〜3-离子的4〜I_l3 / 2亚稳态能级的荧光寿命τ来优化其组成。选择Er浓度作为猝灭浓度，发现其为1.4×10 20离子/ cm 3。发现Yb浓度对τ几乎没有影响，而发现AlO_3 / 2的1.5×10 -21离子/ cm〜3的浓度足以使τ最大化。 7铝浓度几乎不影响放大的自发发射光谱的平坦度。通过对包层进行反应性离子刻蚀来设计带状加载的波导，并评估其作为集成光放大器候选器件的性能。测量的传播损耗为0.7 dB / cm，损耗减小为2.7 dB（对于5.7 cm长的波导）。

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