Pulsed digital micro-holography of femto-second order by double-wavelength recording  

作　　者：WANG Ming-wei WANG Xiao-lei ZHAI Hong-chen 

机构地区：[1]Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science ＆ Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China

出　　处：《Optoelectronics Letters》2007年第2期133-135,共3页光电子快报（英文版）

基　　金：This work is financially supported by the National Natural Sci-ence Foundation of China (Grant No. 60377008)

摘　　要：Double-wavelength recording used in a pulsed digital micro-holographic system to record ultra-fast processing of the order of femto-second is reported for the first time, where a BBO crystal is used to generate harmonic wave of the incident laser wave, and both of the basic and the frequency doubled waves are time-delayed and introduced to a Michelson＇s interferometer to record two sub-holograms with different spatial frequencies on a single frame of a CCD. In the experiment, an ultrafast dynamic process of air ionization induced by a single femto-second laser pulse is recorded with holography by this system, and both of intensity and phase difference images digitally reconstructed are obtained through Fourier transformation and digital faltering, which show clearly the dynamic process of formation and propagation of the plasma, with a time resolution of the order of femto-second.

关 键 词：脉冲数字微全息系统 飞秒级激光脉冲 双波长记录 相差 数字重建 

分 类 号：O438.1[机械工程—光学工程]