UID marking was accomplished with a 20-watt q-switched ytterbium fiber laser with a 160 mm focal length lens. The small gear sample was marked on both sides. The side with the etched mark had a cycle time of 0.977 seconds. The side with the dark anneal mark had a cycle time of 6.33 seconds. All the 2D codes on the samples read at the lab. The dark 2D matrix code read best at the lab.