Optical arbitrary waveform generation technology is widely applied across various domains, including high-energy-density physics, laser micromachining, and optical communications. Among these applications, the stochastic temporal upconversion of pulses (STUD) technology has emerged as a focal point of interest. Nevertheless, prevailing pulse shaping techniques encounter several hurdles, such as inadequate time-domain resolution, constrained recording durations, and lingering chirp effects, which collectively hinder their ability to fulfill the stringent technical demands for STUD pulses.

To overcome these obstacles, the research team has introduced an innovative pulse time-domain arbitrary shaping technology, leveraging optical waveguide four-wave mixing (FOCUS). This groundbreaking approach has successfully yielded chirp-free pulse sequences, boasting an impressive time-domain resolution of 2 picoseconds, a recording length extending to 400 picoseconds, and a tunable center wavelength range spanning 3.5 nanometers. This technological breakthrough not only offers a viable solution for generating laser pulses tailored to STUD schemes but also paves the way for the development of integrated optical arbitrary waveform generation chips.