Optical Fiber Communication (OFC) revolutionizes modern telecommunications, enabling rapid data transfer across long distances with minimal signal loss. This comprehensive review explores OFC's historical evolution, core principles, components, and versatile applications. Total internal reflection prevents light inserted into one end of the fibre from escaping through the sides. It traces OFC's. Over the last five decades fiber optic communication has been the most important means of human communication. The content covers fundamental aspects of optical fiber technology, including materials, fabrication techniques. Fiber optics has developed so rapidly during the last 30 years that it has become the backbone of our communications systems, critical to many medical procedures, the basis of many criti-cal sensors, and utilized in many laser manufacturing applications. This book is part of the Handbook of Optics.