Lecture
This lecture covers the technological aspects of additive processes, focusing on the consolidation tools used, with a special emphasis on the laser as the most common tool. It delves into the quantum dynamics of a standard laser architecture, explaining the concept of population inversion. The lecture also discusses stimulated emission and absorption processes, detailing the principles of Stimulated Emission of Radiation (SER) and Stimulated Absorption of Radiation (SAR). Furthermore, it explores the stabilization of the travelling intensity within the laser resonator, highlighting the role of photons in this process.