The costive LM-DP-FL is especially suitable for the line marking of metal and plastics. The LM-DP-FL marking system adopts end pumped architecture with Q-switch, and the careful selection of highly dependable TE cooled diode laser pumps, assure the overall reliability and consistence of performance of the system. The high beam quality along with elevated peak power over a very short pulse duration, permits the LM-DP-FL to achieve very aggressive results on metals, and at the same time limiting its thermal effect on plastics. The elevated irradiance (>108W/cm²) of the spot, also obtainable for long focal lengths, produces ideal marking results for a wide variety of materials over a large marking area.