The HD2710 UV dispersive mirror combines reflectivity above 99% around 257 nm with high, smooth negative group delay dispersion (GDD) of −145 fs². This improved coating design enables efficient dispersion compensation and pulse compression in the ultraviolet spectral range, supporting ultrashort pulse generation and high-intensity femtosecond laser applications. Ideal for ultrafast spectroscopy, pump-probe experiments, and advanced laser research.