This paper systematically introduces the structures and characteristics of various tapered optical fiber sensors, providing a comprehensive overview of their applications in biosensing, environmental monitoring, and industrial surveillance. Furthermore, it offers insights into the developmental. Optical splitters, also known as fiber optic splitters, are integral components in fiber optic networks, enabling one fiber input to be divided into multiple outputs. This process makes the fiber thinner over a length that can range from a few millimeters to several centimeters. FBT splitters are one of the earliest types of fiber optic splitters. This topic aims to show an alternative, green-technology based, economic and user-oriented communication.