Abstract:Pulse compression is considered essential for achieving high temporal resolution in two-dimensional electronic spectroscopy (2DES), enabling direct observation of ultrafast phenomena such as electronic relaxation, solvation, and quantum coherent energy transfer. A comprehensive overview of pulse compression techniques commonly employed in 2DES is provided, beginning with the temporal and spectral characteristics of femtosecond laser pulses. The physical principles, benefits, and limitations of widely used compression schemes were examined, including grating pairs, prism pairs, grisms, pulse shapers, and chirped mirrors. Practical considerations for selecting appropriate methods in representative 2DES setups were discussed in detail. By consolidating current methodologies, this work aims to facilitate the development of advanced ultrafast spectroscopy and to support continued progress in the broader field of ultrafast science.