Preface

The book *Optical Fiber and Wireless Communications* provides a platform for practicing re‐ searchers, academics, PhD students, and other scientists to review, plan, design, analyze, evaluate, intend, process, and implement diversiform issues of optical fiber and wireless sys‐ tems and networks, optical technology components, optical signal processing, and security. The 17 chapters of the book demonstrate the capabilities and potentialities of optical commu‐ nication to solve scientific and engineering problems with varied degrees of complexity.

The first six chapters, related to optical fiber systems and networking, provide details of software-defined optical networking, network virtualization over elastic optical networks, and multiperiod attack-aware optical network planning. Also, a future electrical multiplex‐ ing technique, the OFDM technique in cooperation with intensity modulation and direct de‐ tection, and a technique of selective mode excitation are taken into consideration for advanced optical fiber systems.

The second three chapters, associated with optical wireless systems, demonstrate possibili‐ ties of holograms in optical wireless communications, visible light communication with in‐ put-dependent noise, and receiver performance in radio-over-fiber network transmissions.

The next five chapters are concerned with components for optical technologies, especially with parametric and hybrid optical amplifiers, universal traffic switching and flexible opti‐ cal transponders, novel single-mode multifiber connectors, power-over-fiber, and ultrafast all-optical memory applications.

The last three chapters deal with the optical signal processing and security represented by DPS techniques for compensating and equalizing transmission impairments, physical-layer encryption based on digital chaos, and protection architecture feasibility for passive optical networks.

I hope that beginners and professionals in the field would benefit by going through the de‐ tails given in the chapters of this book.

> **Rastislav Róka** Slovak University of Technology, Institute of MICT, FEI STU Bratislava, Slovakia

**Optical Fiber Systems and Networking**
