光学学报, 2003, 23 (8): 897, 网络出版: 2006-06-27
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
非线性光学 四波混频 半导体光放大器 有源光波导 弛豫过程 超高时间分辨 nonlinear optics four wave mixing semiconductor optical amplifier (SOA) active optical waveguide relaxation process ultrahigh time resolution
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.进而提出了用发光二极管结构的非相干光时延四波混频测量有源介质带间和带内载流子弛豫速率的有效方案.
Abstract
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 dynamitic 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.
胡振华, 黄德修, 孙军强, 张新亮, 高劭宏. 非相干光四波混频研究半导体光放大器超快过程[J]. 光学学报, 2003, 23(8): 897. 胡振华, 黄德修, 孙军强, 张新亮, 高劭宏. Study of Ultrafast Process of Semiconductor Optical Amplifier by Four-Wave Mixing with Incoherent Light[J]. Acta Optica Sinica, 2003, 23(8): 897.
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