Fiber optical sensors (FOS) have been widely used to ensure physical parameter monitoring such as strain, temperature, vibration, etc. Fiber Bragg grating (FBG) sensors are of interest mainly as they offer relatively easy integration, multiplexing capabilities, and. This paper presents a review of the recent trends and the current state of the art in the application of fiber optic fiber Bragg gratings (FBG) sensing technology to condition the monitoring (CM) and testing of practical electric machinery and the associated power equipment. FBG technology has. Optical fibers are specialized glass or plastic threads designed for transmitting data in the form of light. The integration of gratings into these fibers has revolutionized the field. This study provides a comprehensive review of FBG sensor technology and its.