Abstract:Pulse compression is one of the key technologies in ultrafast two-dimensional electronic spectroscopy (2DES), which determines the time resolution of the spectrometer and is of great significance for studying ultrafast dynamic such as excited-state relaxation, solvation, and coherent energy transfer. This article provides a systematic review of commonly-used pulse compression methods in 2DES. First, it introduces the time-frequency characteristics of femtosecond laser pulses. Then, it discusses in detail the principles and limitations of various pulse compression techniques, including grating pairs, prism pairs, grating-prism combinations, pulse shapers, and chirped mirror pairs. Finally, by examining representative cases, it analyzes the selection strategies for compression methods in different 2DES systems. Through a systematic review of different pulse compression methods, this article aims to facilitate the development of advanced domestically mastered ultrafast spectroscopic instruments and contribute to the advancement of ultrafast science and related interdisciplinary fields.