We report for the first time on a closed-loop cycle narrow linewidth XeF(C-A) blue laser at a repetition rate of up to 10 Hz with each pulse energy of >1 J. A FWHM linewidth of less than 1.5 nm (minimum to 1.1 nm) with a highly stable wavelength centered at 488.3 nm was achieved by employing a polarization-independent custom-designed narrowband optical filter (NBOF) into the cavity. The pulse energy, as well as the repetition rate, to the best of our knowledge. is the highest ever reported in the narrow linewidth XeF(CA) blue lasers at repetitively-pulsed mode. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement