Recent progress in optical communications has focused on the next generation of the Internet—the Optical Internet. From fundamental to modern aspects, this book provides an understanding of lightwave communication systems in which the lightwave is used as the carrier to transport information over the optical guided media. The text presents optical communication techniques and applications, employing single mode optical fibers as the transmission medium. Additional topics include optical transmitters, optical receivers, optical fiber amplifiers, and optical fiber communication systems. The author also offers both MATLAB ® and Simulink models to illustrate methods.