Progress in standardizing laser-induced damage threshold testing

Over the past two decades, laser technology has made significant strides in scaling peak and average power levels. These advancements span a wide range of laser irradiation techniques, from ultrashort pulses to continuous waves, driving the development of various optical elements and coatings. However, the variability in optics sizes, ranging from optical fibers to meter-sized optics, and the presence of various failure modes pose challenges for laser damage testing. Consequently, there is a pressing need to align relevant laser damage testing standards to ensure the functional performance of optics. In this overview, we discuss recent standards-revision efforts aimed at revising the ISO 21254 family standards. Our primary focus is on improving accuracy and reliability by improving damage criteria, testing procedures, and results analysis methods. These efforts aim to tackle emerging challenges in laser damage testing while ensuring that standards remain compatible with modern technological developments.