The contents of the book cover the optics of rays, waves and beams, fourier optics, electromagnetic theory of light, polarization optics, optics of photon crystals, waveguides and resonators, elements of statistical and quantum optics, interaction of photons with atoms, laser amplifiers and lasers, semiconductor optics, semiconductor photon sources and receivers, acousto- and electro-optics, basics of nonlinear optics, including the optics of ultra-short pulses of light, as well as basic information about optical communication systems and their elements - optical connectors and switches.