Introduction. Step- and graded-index optical fibers. Multi-mode and single-mode optical fibers. Attenuation and dispersion in optical fiber. Guided wave propagation. Fields and modes in optical fiber. Principles of laser generation. Semiconductor lasers. Light amplifiers and their applications. Optical modulation techniques: Direct modulation and external modulation. Multiplexing methods. Optical detectors and receivers: PIN and APD. Optical system performance. Optical integrated circuits. Practical considerations in optical systems. Optical communication systems: Optical modem, digital optical networks. Introduction to nonlinear optics and soliton systems. Numerical simulation techniques in optical systems.