采用波分复用方法实现飞秒级超快动态过程的脉冲数字显微全息记录和再现。在全息记录过程中,利用BBO倍频晶体对入射激光进行倍频,将基波和谐波分光,并经时间延迟后进入迈克耳孙干涉仪,从而可应用波分复用技术,先后在CCD的一帧图像上记录两张具有不同空间频率的子全息图。采用这种方法,实现了对单脉冲飞秒激光激发空气电离的超快动态过程的全息记录,并通过数字傅里叶变换和数字滤波的方法,分别再现出每张子全息图记录的波前,从而获得了具有飞秒时间分辨的空气等离子体形成和传播过程的动态振幅和相位图像,其单次曝光时间为50 fs,曝光时间间隔为400 fs,相应的曝光频率约为2.5×1012f/s。 Pulse Digital Microscopic Holography Recording and Reproduction in Femtosecond Ultrafast Dynamic Process Using Wavelength Division Multiplexing. In the holographic recording process, the BBO frequency doubling crystal frequency multiplication of incident laser, the fundamental and harmonic spectroscopy, and after a time delay into the Michelson interferometer, which can be applied to wavelength division multiplexing technology, one after another in the CCD Of two sub-holograms with different spatial frequencies are recorded on one frame of image. In this method, the holographic recording of the ultra-fast dynamic process of single-pulse femtosecond laser-induced air ionization is realized, and the wavefront recorded by each sub-hologram is reproduced respectively by digital Fourier transform and digital filtering To obtain the dynamic amplitude and phase images of the air plasma formation and propagation process with femtosecond time-resolved air plasma with a single exposure time of 50 fs and an exposure time interval of 400 fs with a corresponding exposure frequency of about 2.5 × 10 12 f / s.