Condensed Matter Physics
Astronomy and Astrophysics
Laser and Optical
or laser physics is a branch of optics
that describes the theory and practice of lasers.
Laser science is
principally concerned with quantum electronics, laser construction, optical cavity design, the physics of
producing a population inversion in laser media, the temporal evolution of
the light field in the laser, and associated fields such as nonlinear optics and quantum optics.