Bogdan – Ștefăniță Călin is a junior scientific researcher at the Center for Advanced Laser Technologies from the National Institute for Laser, Plasma and Radiation Physics in Măgurele, Bucharest, Romania. He received an engineering degree in physical engineering, a master’s degree in lasers and particle accelerators engineering, and a PhD in Physics, from University “Politehnica” of Bucharest, Romania. His current field is high resolution laser processing, micro-scale 3D printing and their applications in optics, particle acceleration and tissue engineering. Marian Zamfirescu is a senior scientific researcher at the Center for Advanced Laser Technologies from the National Institute for Laser, Plasma and Radiation Physics in Măgurele, Bucharest, Romania. He received an engineering degree in physical engineering and a master’s degree in optics and nonconventional techniques using lasers and plasma, from University of Bucharest, Romania, and a PhD in physics from Blaise-Pascal University from Clermont-Ferrand, France. His scientific research activity is currently dealing with laser spectroscopy and laser micro- and nano-structuring using ultrafast pulsed lasers. Niculae – Tiberiu Pușcaș is an emeritus professor at the Department of Physics – University “Politehnica” of Bucharest, Romania. He received a bachelor’s degree in physics from University “Babeș – Bolyai” of Cluj-Napoca, Romania, and a PhD in physics from University of Bucharest. His teaching and research activities include courses for laser physics and engineering, integrated optics and photonics, optical materials, and 37 research projects.