Er3+/Yb3+共掺Al2O3光波导放大器的成分优化

摘要

Using the rate equation propagation model of Er/Yb co-doped Al2O3 waveguide amplifier with copropagating pump at 980 nm,the dependence of the gain on the rare earth ions concentration is investigated.In this model,stimulation and absorption emission process,spontaneous emission and energy transfer process,etc.are considered.The close relationship between rare earth ion concentration and gain is revealed.The results indicate that codoping with appropriate Yb3+ concentration can increase the gain of the amplifier.The optimum Er3+ or Yb3+ concentration of the waveguide amplifier is a relative value,and is affected by the pump power and the waveguide length,etc.The reason for disagreement of the best doping concentrations reported is revealed.%利用980 nm泵浦光激发下Er3+/Yb3+共掺Al2O3光波导放大器的粒子数速率方程,研究了稀土离子掺杂浓度对Er3+/Yb3+共掺Al2O3光波导放大器光学增益的影响.在此模型中,充分考虑到受激吸收、受激发射、自发辐射、能量转移等过程,揭示了稀土离子掺杂浓度和光学增益之间的紧密关系.结果表明,适量Yb3+的共掺杂能够显著提高Al2O3光波导放大器的光学增益.光波导放大器中Er3+/Yb3+的最佳共掺杂浓度不是固定值,受到泵浦功率、光波导放大器长度等因素影响,揭示了各有关报道中最佳掺杂浓度结果不一致的原因.