飞秒脉冲时空变换整形技术

飞秒激光脉冲通过时空变换技术将时域信息变换到空域，通过空域的处理再返回到时域，是实现飞秒激光脉冲整形、测量和控制的一项重要技术。在应用方面，可产生各种所需要的波形．已广泛应用在飞秒化学、信号处理、安全通信、生物学和医学成像等方面。介绍了飞秒时空变换脉冲整形的几种方法。

The temporal pulse shape is given by Fourier transform of spatial pattern transferred from the phase and amplitude masks onto the spectrum. By changing the spectrum and the phase of an ultrafast pulse in space, the recombined laser pulse has controllable temporal shape in time. The shaped ultrafast pulse generation and characterization have been applied in the studies of ultrashort pulse code division multiple access (CDMA) communications, image processing in biomedicine, femtosecond chemistry etc. Some methods of femtosecond pulse shaping for time-to-space conversion of ultrafast optical waveforms are summarized.