Research on the laser damage performance of high reflection coatings at 355 nm

The development of 355 nm high reflection (HR) coatings with high laser-induced damage threshold (LIDT) is one of the continuing challenges for the high power laser field. To increase the LIDT, many efforts have been done concerning the coating material, coating design and deposition process. By optimization of the coating design and deposition parameters, the 355 nm HR coating with LIDT higher than 18J/cm2 has been prepared. The development of the measuring technique has promoted the investigation of laser damage precursors, enabling a better understanding of laser damage mechanism.