Laser Systems and Atomic Transitions

This lecture covers the modules of the 2013 course on laser systems, including basic laser operation, different types of lasers, noise characteristics, optical fibers, modulation techniques, ultrafast lasers, and nonlinear frequency conversion. The instructor explains the atomic transitions and gain in laser systems, focusing on the amplification process of light and its relation to the atomic structure. The lecture also reviews the electron oscillator model to understand light attenuation and absorption in lasers. Additionally, it discusses the effect of the modified complex wave vector relation and absorption coefficient in laser systems.