Ilia, DenisDenisIliaAy, NihatNihatAyCai, MengMengCaiChen, YeYeChenGroße-Wortmann, UweUweGroße-WortmannHartl, IngmarIngmarHartlHillert, WolfgangWolfgangHillertJiang, YujiaoYujiaoJiangKlemps, AlexanderAlexanderKlempsMahnke, ChristophChristophMahnkePanuganti, HarshaHarshaPanugantiPressacco, FedericoFedericoPressaccoTavakol, HamedHamedTavakolTünnermann, HenrikHenrikTünnermann2025-09-242025-09-242025Conference on Lasers and Electro Optics Europe and European Quantum Electronics Conference, CLEO 20259798331512521https://hdl.handle.net/11420/57565Free-electron lasers (FELs) require precise temporal control of ultraviolet (UV) picosecond laser pulses to optimize photocathode performance and electron beam quality [1,2]. At the European XFEL facility, we have implemented this capability through the novel NEPAL (New Photocathode Laser) system [3], which incorporates a high-resolution spatial light modulator (SLM) for advanced pulse shaping [4].enTechnology::621: Applied Physics::621.3: Electrical Engineering, Electronic EngineeringConference Paper10.1109/CLEO/EUROPE-EQEC65582.2025.11111289Conference Paper