An embedded fiber Bragg grating (FBG) sensor, which fabricated in IMS, for temperature sensing was proposed. The temperature responses of the in-fiber Bragg gratings (FBGs) have been investigated. It was found that these responses ranged from pm/°C to pm/°C. The temperature sensitivity of the FBGs was °C. The strain responses remained temperature independent over a temperature range of 20 – 180 ◦C.