This comprehensive, in-depth reference offers an extensive treatment of recent developments in optical performance monitoring for the first time. The book, which is written by foremost authorities in the field, gives a summary of current advancements in the field and discusses OPM's place in upcoming optical systems and networks. To demonstrate their principles, a number of advanced techniques are covered in detail. ASPECTS: explains the concepts and uses of sophisticated OPM techniques and provides a comparative analysis of how well they monitor specific parameters like chromatic dispersion, polarization mode dispersion, and optical signal-to-noise ratio. explains the fundamentals of the many advanced optical signal processing methods and how they are used in OPM. investigates the function and uses of OPM in optical networks, such as long-distance optical transmission systems, coherent optical systems, and optical transport networks. explains OPM's current methods in the global standard. SDH/SONET Technical experts and researchers who wish to comprehend and assess cutting-edge OPM techniques and their implications for the realistic design of next-generation optical systems and networks will find this book to be of great use.