Fiber Bragg gratings (FBGs) using femtosecond laser inscription technology exhibit stable thermal ability at approximately 1000 ℃. High temperature sensors based on femtosecond FBGs demonstrate good repeatability and consistency with thin steel tube packages. The temperature measurement accuracy of the sensor reaches ±5 ℃ within 1000 ℃, which indicates that the femtosecond FBG high temperature sensor can measure temperature up to 1000 ℃. Applications of the sensor in quasi-distributed temperature sensing of the top, middle, and bottom parts of an aeroengine using a three FBG sensor array with 15 femtosecond FBGs was conducted. The results reveal that the highest temperature of the top, middle, and bottom parts is 460 ℃, 600 ℃, and 520 ℃, respectively. Moreover, the circumferential temperature distribution is approximately same. This successful application of the femtosecond FBG high temperature sensor in quasi-distributed temperature sensing of the cylindrical parts indicates good performance in accurate temperature measurement and temperature distribution.