Components and Devices provides a comprehensive account of the state of the art of lightwave technology and is devoted to active and passive components including a discussion of optical fibers, couplers, Bragg gratings, filters, interferometers, multiplexers and demultiplexers, waveguide-grating routers, wavelenth converters, and optical switches. An attempt is made to include as much recent material as possible so tghat students are exposed to the recent advances in this exciting field. The reference list at the end of each chapter is more elaborate than what is common for a typical textbook. The listing of recent research papers should be useful for researchers using the book as a reference. A set of problems is included at the end of each chapter. Telecommunication Systems is devoted to the systems design issues with emphasis on WDM systems. It includes a discussion of the dispersive and nonlinear effects (including polarization-mode dispersion) that affect the quality of the signal as it is transmitted through optical fibers. Other topics include receiver noise, loss, dispersion, and fiber nonlinearity management techniques, and various system design issues relevant to modern WDM systems.