The flexible, transparent fiber made by silica or plastic is known as an optical fiber. The process to transfer information between two or more points which do not use electrical conductor as a medium to perform the transfer is termed as wireless communication. Optical fibres are used in communication, sensors, power transmission, optical-fibre lamps, structural health monitoring, and in various experiments of physics. Wireless communications are used in radio wireless technology, cellular telephones, headphones, headsets, data communications, peripheral and wireless energy transfer. The services permitted by wireless operations are in mobile and interplanetary communications, which are practically impossible to implement by using wires. This book contains some path-breaking studies in the field of optical fiber and wireless communications. It brings forth some of the most innovative concepts and elucidates the unexplored aspects of this field. This book will help new researchers by foregrounding their knowledge in this branch.