Design of laser beam dump with high laser-induced-damage threshold

Unveiling sub-bandgap energy-level structures on machined optical surfaces based on weak photo-luminescence

“…High-power laser systems play an irreplaceable role in material processing, 1,2 the national defense industry, 3 and new energy exploration. [4][5][6][7] Recently, to cater the demands of these fields, laser output powers have been increased sharply, putting forward higher requirements for optical elements with highquality surfaces, especially their optical transmission performance (e.g., optical reflectivity, optical absorbance and laser damage resistance).…”