This course is an introduction to photonics from an electrical engineering point of view. Photonics (sometimes called optical electronics or optoelectronics) is an umbrella term describing the study of the interaction of electrical, acoustical, and optical fields; and its applications to devices and systems used in modern information and telecommunications technology. It should be of interest to those specializing in optics, devices, telecommunications, waves and fields, as well as anyone who might need to use optical sources or detectors. Topics: Photons. Optical resonators. Interaction of light and matter. Lasers. Semiconductor sources and detectors. Nonlinear optics, electro- and acousto-optics. Introduction to photonic switching, computing and communications.