Optical Physics

A. Thetford

Sergei A. Akhmanov, S. Yu. Nikitin

Abstract Based on a course offered at Moscow State University, this text comprehensively presents the fundamentals of modern physical optics. The concepts of classical and quantum radiation theories, nonlinear physics, statistics, and Fourier transformations are shown to form the bedrock of modern optics and optical physics. Subjects include lasers, nonlinear optics, optical spectroscopy, and optical fields. The material is much more topical than that in conventional textbooks, and it provides a picture of physical optics as an expert would see it, but in a form accessible to a student.

Max Garbuny, Allen L. King

Zhenxing Wang, Mable P. Fok, Paul R. Prucnal

Data security at the physical layer of optical networks, or optical layer security, has received considerable research attention due to the rapid growth of optical network capacity [1]. Among various optical layer approaches, optical codedivision multiple access (OCDMA) systems are considered to be promising because of the physical encoding and decoding processes comprising these systems. Generally, physical encoding is an important concept in the field of optical layer security, which implements encoding to the transmitted optical signals, and protects the transmitted data from attack. In this paper, we provide an overview of various OCDMA systems, and discuss the impact of different physical encoding methods on OCDMA systems, in terms of security assurance. Furthermore, we introduce the application of physical encoding to optical steganography and optical transmission with wireless CDMA for security improvement.

Ying Du, Zhaoyun Li, Li Wang +2 more

Optical network has the characteristics of high speed, large capacity, long distance, and no electromagnetic interference. It is widely used in global information network. More than 90% of the world's information is transmitted through optical network, and has become an important strategic infrastructure of modern information society. Optical network physical layer security is one of the important indicators of optical network communication quality. It represents the ability of the optical network physical layer information to resist human interception and attacks. This paper summarizes the development of physical layer security technology of optical network, including physical layer security system of optical network, optical information protection and optical layer firewall, analyzes the development trend of the technology, and puts forward some suggestions on the development of physical layer security technology of optical network from the perspective of long-term development strategy and recent development focus.

A. E. Kaplan