Simulation of Ultrafast Cross-Gain Modulation in Optically-Pumped GaN/AlN Intersubband Optical Amplifiers
Simulation of Ultrafast Cross-Gain Modulation in Optically-Pumped GaN/AlN Intersubband Optical Amplifiers
复制标题
光泵浦 GaN/AlN 子带间光放大器中超快交叉增益调制的仿真
DOI：
10.1143/jjap.42.5607
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
N. Suzuki
中科院分区：
文献类型：
--
作者：
N. Suzuki
采用一维时域有限差分（FDTD）模型分析了光泵GaN/AlN子带间光放大器（ISOA）中亚皮秒光脉冲的交叉增益调制（XGM）。在泵浦功率为6-7 W时，1.544 µm处的计算信号增益约为20 dB。在100 fJ的控制脉冲能量下预测了10 dB的增益抑制。这种开关能量比利用GaN/AlN量子威尔斯中的子带间跃迁的可饱和吸收开关小一个数量级。模拟表明，即使在1 Tb/s下，XGM开关也没有严重的模式效应。
Cross-gain modulation (XGM) of sub-picosecond optical pulses in optically-pumped GaN/AlN intersubband optical amplifiers (ISOA) has been analyzed by a one-dimensional finite-difference time-domain (FDTD) model. The calculated signal gain at 1.544 µm was about 20 dB at a pumping power of 6–7 W. A 10-dB gain suppression was predicted at a control pulse energy of 100 fJ. This switching energy is one order of magnitude smaller than that in saturable-absorber switches utilizing the intersubband-transition in GaN/AlN quantum wells. The simulation suggested that the XGM switches operate without serious pattern effect even at 1 Tb/s.