Lam Billy, Guo Chunlei
Opt Lett. 2021 Apr 15;46(8):1796-1799. doi: 10.1364/OL.417997.
In this Letter, we introduce a technique to fully determine the spatio-temporal electric field (,,) of an arbitrary ultrashort pulse. By passing the beam through a wedged reversal shearing interferometer followed by a scanning Michelson interferometer, the field autocorrelation of the shearing interferograms is measured. The spectrum of the shearing interferograms is obtained after a Fourier transform by the Whittaker-Shannon sampling theorem, yielding the amplitude and wavefront information at every wavelength. With the addition of the phase information of a single point, we are able to directly reconstruct the spatio-temporal electric field (,,) of an arbitrary ultrashort pulse.
在本信函中，我们介绍一种用于完全确定任意超短脉冲的时空电场（，，）的技术。通过使光束穿过楔形反转剪切干涉仪，然后再穿过扫描迈克尔逊干涉仪，测量剪切干涉图的场自相关。根据惠特克 - 香农采样定理，经过傅里叶变换后可得到剪切干涉图的光谱，从而得出每个波长处的振幅和波前信息。加上单点的相位信息，我们就能直接重建任意超短脉冲的时空电场（，，）。
