非相干光四波混频研究半导体光放大器超快过程  

Study of Ultrafast Process of Semiconductor Optical Amplifier by Four-Wave Mixing with Incoherent Light

作　　者：胡振华 黄德修[1] 孙军强 张新亮 高劭宏[1] 

机构地区：[1]华中科技大学光电子工程系 [2]武汉理工大学物理学系武汉430063

出　　处：《光学学报》2003年第8期897-901,共5页Acta Optica Sinica

基　　金：国家 973高科技计划 (G2 0 0 0 36 6 0 5 );国家自然科学基金(6 0 1770 15 )资助课题

摘　　要：具体推导了相位共轭型非相干光时延四波混频信号强度随时间延迟的一般变化规律。结果表明 :对于用有限线宽非相干光激发源非相干光时延四波混频信号强度随时间延迟的变化规律具有对称性 ,且强度峰与激发光场带宽成正比 ,与纵向弛豫速率成反比。这一结果为利用发光二极管作抽运源研究半导体光放大器及有源光波导超快动力学过程提供了理论基础。A general formulae of signal intensity on time-delay four wave mixing with incoherent light (TDFWM-IL) is deduced based on two-level model. The result shows that signal intensity in TDFWM-IL is symmetric for linewidth-limited light beams, the signal peak is proportional to the linewidth of excitation beams and inversely proportional to longitudinal relaxation rate. The result is applicable to the study of ultrafast dynamic process in semiconductor optical amplifier (SOA) and active light waveguide. Furthermore, an effective experimental scheme based on the TDFWM-IL structure of LED is proposed for the observation of inter and intra-band carrier relaxation rates in the active medium.

关 键 词：四波混频 半导体光放大器 有源光波导 弛豫过程 非相干光 超快过程 超高时间分辨 

分 类 号：TN722.3[电子电信—电路与系统] O437[机械工程—光学工程]