LLNL - Laser Damage Resistant Anti-Reflection Grating Debris Shield
Photo credit: Lawrence Livermore National Laboratory
AR-GDS at Lawrence Livermore National Laboratory (LLNL) is the world’s most laser-damage resistant fused silica optic used at UV wavelengths. AR-GDS' are a cost-effective way to measure power and energy of fusion-class laser systems such as the 192-beam National Ignition Facility. The average number of damage sites per optic has dropped by a factor of 20 while providing approximately 3.6% more energy to the target. These improvements led to a decrease in the operating cost of GDSs of more than 600 percent.
AR-GDS is the result of years of research at LLNL involving the development of the Advanced Mitigation Process, the hexamethyldisilazane sol-gel coating, and advanced photolithographic techniques.