This book presents an overview of the state of the art of the developing topic of nonlinear optics with contributions from leading experts in the field in China, ranging from weak light nonlinear optics, ultrafast nonlinear optics to electro-optical theory and applications. In the past decade, nonlinear optics has evolved into many different branches, depending on the form of the material used for studying the nonlinear phenomena. The growth of research in nonlinear optics is closely linked to the rapid technological advances that have occurred in related fields, such as ultra-fast phenomena and optical communications. Nonlinear-optics activities range from the fundamental studies of the interaction between matter and radiation to the development of devices, components, and systems of tremendous commercial interest for widespread applications in optical telecommunications, medicine, and biotechnology. This book reviews the development of some nonlinear optics researches in China, not only the discovery of new principles, but also potential applications of nonlinear optics for various industries.

This book includes six chapters. The first chapter introduces the characteristics and the classification of POPs; the second chapter explains the harm of POPs from the perspective of environmental science; the third chapter introduces in detail the distribution characteristics of POPs in China; the fourth chapter analyses the need for legal governance to prevent and control pollution of POPs in China from the perspective of legislation; the fifth chapter comprehensively reviews the relevant laws, regulations and rules on prevention and control of POPs in China, from the macro level and micro level; and the sixth chapter analyses the problems during the process of legal governance and offers some suggestions from four links, including legislation, enforcement, judicature and law-abiding. The authors hope this research can play a role in the legal governance of POP pollution in China and also hope readers will understand the state of legal governance of POPs in China. The authors ask that they give some valued comments for the environmental protection of China.