Additive manufacturing systems and methods for the same

An additive manufacturing device, comprising:

• a stage configured to support a substrate;
• a printhead disposed above the stage, the printhead configured to heat a build material to a molten build material and deposit the molten build material on the substrate in the form of droplets to fabricate an article;
• a controlled heating and ablation system disposed proximal the printhead, wherein the controlled heating and ablation system comprises a laser, wherein an output from the laser comprises:
• a power of from about 40 watts (W) to about 1500 W,
• an irradiance of from about 1 W/cm2 to about 10,000 W/mm2,
• a wavelength of from about 355 nm to about 1200 nm,
• a fluence (F) of from about 0.1 J/cm2 to about 50 J/cm2,
• a pulse energy of from about 1 microjoule (μJ) to about 50 millijoules (mJ),
• a pulse repetition rate of from about 5 kHz to about 250 MHz,
• a pulse width of from about 0.5 ns to about 100 ms,
• a pulse duration that is lower than a thermal relaxation time of the substrate to minimize a temperature increase of the substrate,
• wherein the output is configured to concurrently heat the substrate and ablate oxides on a surface of the substrate, and wherein an area on the surface that is heated by the output has a diameter of from about 0.025 mm to about 2.0 mm;
• a monitoring system configured to monitor a temperature of the substrate;
• and
• a computing system configured to adjust the controlled heating and ablation system based on the temperature of the substrate provided by the monitoring system.