Abstract: Since their discovery in 1986, the cuprate superconductors have been a continual source of new scientific enigmas. At the heart of their strange behavior are the mysterious strong correlations between electron pairs, which occupy almost every section of the cuprate phase diagram: from the superconducting and pseudogap regimes, to the strange metal phase. The nature of unconventional Cooper pairing, still one of the most fiercely debated aspects of cuprate superconductivity, may hold the key to understanding such novel phases. In this talk, I will present my contributions in the development of two electron coincidence photoemission spectroscopy (2e-ARPES) as a platform to probe zero and finite-momentum pairing states in the cuprate superconductors. I will show our experimental realization of 2e-ARPES by means of two time-of-flight photoelectron analyzers and a high-harmonic generation tabletop source of XUV photons, as well as some preliminary experimental results.