利用圆锥辐射优化飞秒荧光光谱的光学参量放大  

Optimization of Optical Parametric Amplification on Femtosecond Fluorescence Spectra by Referring to Cone Emission

作　　者：李锋铭[1] 王树峰[1] 龚旗煌[1] 

机构地区：[1]北京大学物理学院,介观物理国家重点实验室,北京100871

出　　处：《光谱学与光谱分析》2011年第5期1283-1285,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10504001,60878019,10821062,10934001,60677002,10828407);国家基础研究发展计划项目(2009CB930504,2007CB307001,2006CB921601,2006CB806007)资助

摘　　要：基于非共线光学参量放大的飞秒时间分辨荧光光谱技术是一种新的超快光谱研究方法。文章研究了荧光放大的参量过程。超连续的种子光其瞬时光强可以被线性放大。由于系统高达107的放大能力,泵浦脉冲能量的微小不稳定性在最终放大输出信号中将产生很大起伏。提出了一种利用圆锥辐射作为参考消除此干扰的方法。研究表明,探测的荧光动力学曲线有显著改善。Femtosecond time-resolved fluorescence spectra technique based on non-collinear optical parametric amplification is a new method for ultrafast spectroscopy research.In the present report,the authors discuss the dynamic range for amplifying fluorescence.The supercontinuum seed can be amplified linearly to its transient intensity.Due to large amplification ratio up to 107,small instability in pump pulse energy produces large fluctuation in final output amplitude.Here the authors introduce a method using cone emission as reference to overcome this difficulty.The results show significant improvement in fluorescence dynamics curve.

关 键 词：飞秒 光学参量放大 圆锥辐射 荧光动力学 

分 类 号：O644[理学—物理化学]