Photonic devices used in telecommunication systems. The wave propagation equation and the fundamentals of optical wave guiding: single-mode, multi-mode optical fibers and introduction to the design and modeling of Photonic Integrated Circuits (PICs) using software tools based on numerical solution of the wave equation. Propagation of optical signals in single-mode fibers and signal quality degradation. Loss: origin of optical loss in fibers and loss management. Dispersion: Group Velocity Dispersion (GVD), third order dispersion, waveguide dispersion, dispersion-induced degradation of optical systems, dispersion compensation and management approaches. Nonlinear effects: Self Phase Modulation (SPM), Cross Phase Modulation (XPM), Four Wave Mixing (FWM), Stimulated Brillouin Scattering (SBS), and Stimulated Raman Scattering (SRS). Passive photonic devices: directional couplers, optical filters, optical isolators, optical circulators. Fiber interferometers: Mach-Zehnder Interferometer, Fabry-Perot Interferometer and Sagnac Interferometer. Polarization of optical signals and polarization control. Active photonic devices: semiconductor lasers, optical amplifiers, optical modulators and optical receivers. Introduction to all-optical data processing: Ultrafast optical logic using Sagnac fiber logic gates. Introduction to multiplexing schemes in optical communication systems: Optical Time Division Multiplexing (OTDM) and Wavelength Division Multiplexing (WDM).