Nonlinear optical phenomena have been widely investigated and well understood since the invention of the Laser. Lots of applications of the nonlinear optical phenomena have always been advanced in various fields, such as, optical information storage, all-light computing, optical switch, optical limiters, micro-nano-fabrication, etc. Nonlinear optics has been developed into a subfield of optics, and there is no indication that either the developments of nonlinear optics or its applications are slowing down. In nonlinear optics, the characterization and measurement techniques of the nonlinear index are critical for understanding the nonlinear physical process and developing new applications. In this book, different optical nonlinearity characterization and measurement methods are introduced and nonlinear problems are discussed theoretically. This book is invaluable to advanced undergraduates, graduate students and researchers working in the fields of physics, materials, and chemistry.
