Nanostructure Semiconductor Optical Amplifiers reviews all-optical processing methods currently available and presents semiconductor optical amplifiers (SOAs) as a new building block for this purpose. The authors discuss the overcomes of high frequency operation of SOAs and propose a new all-optical pumping method for the implementation of semiconductor optical amplifiers. From the reviews:This book mainly focuses on quantum-dot-based semiconductor optical amplifiers. It includes basic principles, design and simulation methods, optical characterizations, high-speed switching performances and functional applications. It is well organized, and it includes references in each chapter... a very good guide for graduate students as well as researchers and engineers working in the research and development of semiconductor optical amplifiers and all-optical signal processing. Lisa Tongning Li, "Optics & Photonics News"