Zhang Meiling, Yin Jiao, Jia Zhixu, Song Weiye, Wang Xibin, Qin Guanshi, Zhao Dan, Qin Weiping, Wang Fei, Zhang Daming
J Nanosci Nanotechnol. 2016 Apr;16(4):3564-9. doi: 10.1166/jnn.2016.11864.
Gain characteristics of polymer waveguide amplifiers based on NaYF4:Yb3+, Er3+ nanocrystals (NCs) at 0.54 µm wavelength were investigated through numerical simulations. NaYF4:18%Yb3+, 1 0%Er3+ NCs were doped into SU-8 2005 polymer matrix as the core of a polymer waveguide. The absorption spectrum and photoluminescence spectrum of the NCs were recorded and analyzed. The Judd-Ofelt parameters were achieved by means of Judd-Ofelt theory: Ω2 = 6.302 x 10(-20) cm2, Ω4 = 0.69 x 10(-20) cm2, Ω6 =7.572 x 10(-20) cm2. We simulated the gain characteristics of the waveguide amplifier at 0.54 µm wavelength by combining the atomic rate equations with power propaga- tion equations. The gain curves had the saturation effects. A maximum gain -4.3 dB for the 5 cm waveguide with the Er3+ concentration of ~7.5 x 1025 m-3 was obtained.
通过数值模拟研究了基于NaYF4:Yb3+、Er3+纳米晶体（NCs）的聚合物波导放大器在0.54μm波长下的增益特性。将NaYF4:18%Yb3+、10%Er3+的NCs掺杂到SU-8 2005聚合物基体中作为聚合物波导的芯层。记录并分析了NCs的吸收光谱和光致发光光谱。通过Judd-Ofelt理论得到Judd-Ofelt参数：Ω2 = 6.302×10(-20) cm2，Ω4 = 0.69×10(-20) cm2，Ω6 = 7.572×10(-20) cm2。通过将原子速率方程与功率传播方程相结合，模拟了波导放大器在0.54μm波长下的增益特性。增益曲线具有饱和效应。对于Er3+浓度约为7.5×1025 m-3的5 cm波导，获得了最大增益-4.3 dB。
