ABSTRACT
The most important characteristic of Brillouin optical correlation domain analysis (BOCDA) is distributed strain and temperature sensing with high spatial resolution. This chapter explains the history of the BOCDA development such as principle and basic functions of BOCDA, measurement equipment developed to date, advantages of BOCDA for aircraft Structural health monitoring (SHM), and application scenarios. SHM contributes to reducing maintenance costs, improving flight safety, and fuel efficiency. The BOCDA-SHM system has a big potential to reduce maintenance costs, improve flight safety, and fuel efficiency. The application scenarios of the BOCDA-SHM system are whole structure monitoring utilizing the characteristics of the system such as distributed wide area monitoring, high spatial resolution, and high sampling rate. Optical fiber sensor, which is one of the attractive sensor using SHM technologies, has great characteristics such as lightweight, high corrosion durability, high electromagnetic durability, and capability to be embedded into composites.
