Improved Carrier-Envelope Phase Determination Method for Few-Cycle Laser Pulses Using High-Order Above-Threshold Ionization

Recent studies indicate that the stereo-ATI carrier-envelope phase meter (CEPM) is an effective method to determine the carrier-envelope phase (CEP) of each and every single few-cycle laser pulse. In this method, a two-dimensional parametric asymmetry plot (PAP), which can be obtained with the measured data in two short time-of-flight intervals, is applied to extract the CEP. Thus, part of the data containing useful CEP information is discarded in the PAP method. In this work, an improved method was developed to effectively exploit most of the experimental data. By this method, we achieve a CEP precision of 57 mrad over the entire 2 pi range for 5.0 fs laser pulses.

Automated summary

Recent studies show that the stereo-ATI carrier-envelope phase meter is an effective method for determining the carrier-envelope phase of few-cycle laser pulses, but current methods discard some data containing important CEP information. A new improved method has been developed in this work to effectively utilize most of the experimental data, achieving a CEP precision of 57 mrad over the entire 2 pi range for 5.0 fs laser pulses.