摘要
利用速率方程模型,通过求稳态解,比较了1 480、980、820 nm 3种波长泵浦时的掺Er3+ Al2O3平面光波导放大器的增益与泵浦功率和掺铒浓度的关系. 在确定的泵浦功率下, 存在最佳掺铒浓度,可得到最大增益；并且泵浦功率增大,最佳掺铒浓度也增大. 同时分析了 激发态吸收和合作上转换对增益的影响；高功率泵浦时,激发态吸收对增益的影响明显,高浓 度掺Er3+时,合作上转换对增益的影响显著,并提高了放大器阈值泵浦功率.
The gain characteristics of Er3+ doped Al2O3 spiral waveguide amplifi er are theoretically obtained using steady-state rate equations. The dependence of gain on pump power and Er3+ concentration is depicted respectively pum ping at 1 480 nm, 980 nm, 820 nm. It is shown that for certain pump power, an op timum Er3+ concentration exists corresponding to the maximum possible gain . The effect of excited state absorption and cooperative upconversion on optical gain is analyzed. At high pump power, the effect of ESA is great and the effect of CUC is remarkable at high Er3+ concentration. By comparison, 980 nm pu mping is more efficient.
出处
《大连理工大学学报》
CAS
CSCD
北大核心
2001年第1期24-28,共5页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(69787001,69889701).
关键词
光波导理论
激发态吸收/光增益
合作上转换
waveguide theory
excited state absorption/optical gain
cooperative upconversion
